The Five-membered Hetero Ring Is Unsubstituted Or Alkyl Substituted Only (e.g., Pyrrole, Etc.) Patents (Class 548/564)
  • Patent number: 5907044
    Abstract: A method of isolating 1-?N.sup.2 -((S)-ethoxycarbonyl)-3-phenylpropyl)-N.sup.6 -trifluoroacetyl!-L-lysyl-L-proline (lisinopril (TFA) ethyl ester, LPE). The solvent or solvent mixture used for the extraction is also a main constituent of the solvent or solvent mixture from which the crystallization takes place. High yield as well as good purity of the end product are obtained, without distillation. 1-?N.sup.2 -((S)-ethoxycarbonyl)-3-phenylpropyl)-N.sup.6 -trifluoroacetyl!-L-lysyl-L-proline (lisinopril (TFA) ethyl ester, LPE) is described as a precursor for producing an ACE inhibitor.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: May 25, 1999
    Assignee: Degussa Aktiengellschaft
    Inventors: Matthias Kottenhahn, Roland Moller, Michael Kraft, Karlheinz Drauz, Klaus Stingl
  • Patent number: 5883106
    Abstract: Novel compounds having the ability to inhibit 5-lipoxygenase enzyme and having the following formula I: ##STR1## and the pharmaceutically acceptable salts thereof, wherein Ar.sup.1 is a heterocyclic moiety which is selected from imidazolyl, pyrrolyl, pyrazolyl, 1,2,3-triazolyl, 1,2,4-triazolyl, indolyl, indazolyl and benzimidazolyl, which is bonded to X.sup.1 through a ring nitrogen atom, and which may be optionally substituted with one or two substituents selected from halo, hydroxy, cyano, amino, and C.sub.1-4 alkyl; X.sup.1 is a direct bond or C.sub.1-4 alkylene; Ar.sup.2 is phenylene optionally substituted with halo, hydroxy, cyano, and amino X.sup.2 is --A--X-- or --X--A-- wherein A is a direct bond or C.sub.1-4 alkylene and X is oxy, thio, sulfinyl or sulfonyl; Ar.sup.3 is phenylene, pyridylene, thienylene, furylene, oxazolylene or thiazolylene optionally substituted with one or two substituents selected from halo, hydroxy, cyano, amino and C.sub.1-4 alkyl; R.sup.1 and R.sup.2 are each C.sub.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: March 16, 1999
    Assignee: Pfizer Inc.
    Inventors: Rodney W. Stevens, Takashi Mano, Kazunari Nakao, Yoshiyuki Okumura
  • Patent number: 5869696
    Abstract: Universal solid support oligonucleotide synthesis reagents, oligonucleotide synthesis processes, and reagents for cleaving oligonucleotides from solid supports are disclosed. Oligonucleotide synthesis reagents have the following general formula:SS--R.sup.6 --O--R.sup.3 Iwherein SS is a solid support; R.sup.6 is ##STR1## where R.sup.5 is hydrogen or alkyl and R.sup.4 is a phosphate protecting group; and R.sup.3 is a ring moiety having vicinal groups --XR.sup.1 and --YR.sup.2 wherein each of X and Y is independently selected from the group consisting of O, S and NH and one of R.sup.1 and R.sup.2 is a blocking moiety and the other is hydrogen or a hydroxy protecting group. Oligonucleotide cleaving reagents include methylamine and/or ammonium hydroxide and trimethylamine.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: February 9, 1999
    Assignee: Beckman Instruments, Inc.
    Inventors: M. Parameswara Reddy, Maged A. Michael, Firdous Farooqui
  • Patent number: 5817691
    Abstract: There are provided arylthio, -sulfinyl and -sulfonyl pyrrole compounds having the structural formula I ##STR1## Further provided are compositions and methods comprising those compounds for the control of insects.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: October 6, 1998
    Assignee: American Cyanamid Company
    Inventors: Keith Douglas Barnes, Robert Eugene Diehl, Susan Hensen Trotto, Yulin Hu
  • Patent number: 5792778
    Abstract: The present invention addresses 2-substituted aryl pyrroles, as well as compositions containing such compounds and methods of treatment. Cytokine mediated diseases refers to diseases or conditions in which excessive or unregulated production or activity of one or more cytokines occurs. Interleukin-1 (IL-1), Interleukin-6 (IL-6), Interleukin-8 (IL-8) and Tumor Necrosis Factor (TNF) are cytokines which are involved.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: August 11, 1998
    Assignee: Merck & Co., Inc.
    Inventors: Stephen E. de Laszlo, Nigel J. Liverton, Gerald S. Ponticello, Harold G. Selnick, Nathan B. Mantlo
  • Patent number: 5773660
    Abstract: A process for preparing amines of the formula I ##STR1## where R.sup.1,R.sup.2,R.sup.3,R.sup.4,R.sup.5 and R.sup.6 are each hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.2 -C.sub.20 -alkynyl, C.sub.3 -C.sub.20 -cycloalkyl, C.sub.4 -C.sub.20 -alkylcycloalkyl, C.sub.4 -C.sub.20 -cycloalkylalkyl, aryl, C.sub.7 -C.sub.20 -alkylaryl or C.sub.7 -C.sub.20 -aralkyl,R.sup.1 and R.sup.2 are together a saturated or unsaturated C.sub.3 -C.sub.9 -alkylene dichain, andR.sup.3 or R.sup.5 is C.sub.21 -C.sub.200 -alkyl or C.sub.21 -C.sub.200 -alkenyl or together they are a C.sub.2 -C.sub.12 -alkylene dichain,by reacting olefins of the formula II ##STR2## where R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each as defined above, with ammonia or primary or secondary amines of the formula III ##STR3## where R.sup.1 and R.sup.2 are each as defined above, at temperatures from 200.degree. to 350.degree. C.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: June 30, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Karsten Eller, Rudolf Kummer, Eugen Gehrer
  • Patent number: 5691337
    Abstract: Oxy-phenyl-(phenyl)glycinolamides with heterocyclic substituents are prepared by reaction of the corresponding oxyphenylcarboxylic acids with heterocyclic substituents with phenylglycinol. The new substances are suitable as active compounds in medicaments, in particular in agents having an antiatherosclerotic action.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: November 25, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Muller, Richard Connell, Siegfried Goldmann, Klaus-Helmut Mohrs, Siegfried Raddatz, Michael Matzke, Rudi Grutzmann, Martin Beuck, Stefan Wohlfeil, Hilmar Bischoff, Dirk Denzer
  • Patent number: 5502213
    Abstract: A process for purifying crude pyrroles obtained in the preparation of pyrroles of the general formula I ##STR1## where R is hydrogen or a C.sub.1 -C.sub.6 -alkyl radical, which comprises treating the mixture containing the crude pyrrole with an acid or an activated carboxylic acid derivative and removing the pyrrole from the mixture by distillation at reduced pressure and at a bottom temperature of up to 160.degree. C.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: March 26, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Pfab, Peter Wahl, Dieter Franz
  • Patent number: 5422335
    Abstract: A herbicidal composition containing one or more substituted 2-aminothiophenes of the formula I ##STR1## where R.sup.1 and R.sup.2 together from a C.sub.4 -alkylene chain to which a benzene ring may be fused,R.sup.3 is --CN or CX--R.sup.6, where R.sup.6 is hydroxyl, C.sub.1 -C.sub.4 -alkoxy or amino,R.sup.4 is hydrogen or a phenyl group which may carry one or two nitro radicals,--PO(OR.sup.8).sub.2, --CX--R.sup.9, --SO.sub.2 R.sup.10, --CX--N(H) --CO--R.sup.8 or --CX--N(R.sup.7)--SO.sub.2 --R.sup.11,whereR.sup.8 is hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl groupR.sup.9 is C.sub.1 -C.sub.20 -alkyl, partially or completely halogenated C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.6 -cycloalkyl, or amino, C.sub.1 -C.sub.4 -alkylamino, C.sub.3 -C.sub.8 -cycloalkylamino, phenyl or phenylamino, where the aromatic moiety may carry at least one of nitro and halogen;R.sup.10 is C.sub.1 -C.sub.4 -alkyl or phenyl, which may carry one C.sub.1 -C.sub.4 -alkyl radical;R.sup.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: June 6, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmut Hagen, Gerhard Nilz, Helmut Walter, Andreas Landes
  • Patent number: 5367084
    Abstract: A process for preparation of new or previously known pyrrol derivatives is provided. The process involves reacting a nitroalkane or a nitroalkene with an isocyanoacetate in the presence of a proprophosphatrane "super base" to prepare the pyrrol compounds. Through production of new pyrrol compounds, new pyrrol derivatives such as dipyrromethane and porphyrin may be synthesized. In addition, the high yields of pyrrol compounds produced according to the method of the invention provide for more efficient production of previously known dipyrromethane and porphyrin compounds. The invention further provides a mild, high yield process for de-esterification of esterified pyrrol and dipyrromethane compounds. The invention also provides a synthetic method for the production of high yields of oxazoles through reaction of an aryl halide or acid anhydride with an isocyanoacetate in the presence of a prophosphatrane "super base".
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: November 22, 1994
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: John Verkade, Jiansheng Tang
  • Patent number: 5132307
    Abstract: New tetralin derivatives of the formula I ##STR1## wherein R.sup.1 to R.sup.8 and Z have the meanings indicated herein and salts thereof, exhibit an effect on the cardiovascular system.
    Type: Grant
    Filed: November 7, 1989
    Date of Patent: July 21, 1992
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Manfred Baumgarth, Rolf Gericke, Rolf Bergmann, Jacques De Peyer, Ingeborg Lues
  • Patent number: 5118704
    Abstract: Optically active or racemic compounds are provided having the formula ##STR1## where R.sub.2, R.sub.3, R.sub.4 and R.sub.6 are defined in the specification; R.sub.1 is selected from the group consisting of ##STR2## wherein Y is selected from the group consisting of hydroxy, nitro, cyano, azido, amino, acylamino, carboxyamido, trifluoromethyl, sulfate, sulfonamido, halogen, hydrocarbyl and hetero atom-substituted hydrocarbyl radicals, wherein said heteroatoms are selected from the group consisting of halogen, nitrogen, oxygen, sulfur and phosphorus and said hydrocarbyl radicals comprise from 1 to 12, preferably 1 to 6, carbon atoms, and a is an integer of from zero to 3, for instance zero to 2; and pharmaceutically acceptable salts thereof; as dopaminergics.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: June 2, 1992
    Assignee: Whitby Research, Inc.
    Inventors: Gevork Minaskanian, James V. Peck
  • Patent number: 5086074
    Abstract: Compounds of the formula ##STR1## and pharmaceutically acceptable salt thereof, wherein R.sup.2 is selected from hydroxy and lower alkoxy, R.sup.5 is lower alkyl, and R.sup.11 and R.sup.12 are independently selected from hydrogen, halo, hydroxy, methoxy, and lower alkyl, are selective .alpha..sub.2 adrenergic receptor antagonists useful in the treatment of glaucoma.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: February 4, 1992
    Assignee: Abbott Laboratories
    Inventors: John F. DeBernardis, Robert E. Zelle, Fatima Z. Basha
  • Patent number: 4906758
    Abstract: Pyrroles of the formula I ##STR1## are prepared by a process in which a dialkoxytetrahydrofuran of the formula II ##STR2## where R.sup.2 to R.sup.5 in the formulae (I) and (II) are identical or different and are each hydrogen, a straight-chain or branched alkyl or alkenyl radical of not more than 12 carbon atoms, a cycloalkyl or cycloalkenyl radical of 5 to 8 carbon atoms, an aryl, alkylaryl or aralkyl radical of 6 to 16 carbon atoms, and two non-adjacent radicals R.sup.6 to R.sup.9 are alkoxy and the other two radicals R.sup.6 to R.sup.9 are hydrogen, is reacted with ammonia or a primary amine H.sub.2 NR.sup.1, where R.sup.1 in formula (I) is hydrogen, alkyl, aryl, alkylaryl, aralkyl or cycloalkyl, in the presence of an acidic, solid, heterogeneous catalyst. Zeolites, for example those of the pentasil type or faujasite type, or phosphates, acidic oxides, phosphoric acid or boric acid on a carrier can be used as the solid heterogeneous catalysts.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: March 6, 1990
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Hoelderich, Michael Hesse, Hardo Siegel
  • Patent number: 4863522
    Abstract: A composition comprising(a) a dianthraquinonyl pigment of formula I ##STR1## (b) a compound of formula II ##STR2## wherein X.sup..sym. is H.sup..sym. or a group of formula M.sup.n.sym. /n or N.sup..sym. (R)(R.sub.1)(R.sub.2)(R.sub.3), M.sup.n.sym. is a monovalent metal cation of valency n, n is 1, 2 or 3, each of R, R.sub.1, R.sub.2 and R.sub.3 independently is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.6 cycloalkyl, phenyl or phenyl which is substituted by C.sub.1 -C.sub.18 alkyl, or R.sub.2 and R.sub.3, together with the linking nitrogen atom, are a pyrrolidine, imidazolidine, piperidine, piperazine or morpholine radical, or R.sub.1, R.sub.2 and R.sub.3, together with the linking nitrogen atom, are a pyrrole, pyridine, picoline, pyrazine, quinoline or isoquinoline radical, r and t are each independently of the other 0 or 1, with the proviso that at least one of r and t must be 1.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: September 5, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Max Jost, Edward E. Jaffe, Philippe Bugnon
  • Patent number: 4798894
    Abstract: Compounds containing at least one N,N-dialkylatable amino or amido group (e.g., aniline, dodecylamine, acetamide) are converted in a highly efficient manner into gem cyclodialkylated compounds by reaction with an unstrained cyclic ether (e.g., tetrahydrofuran) or a polyol (e.g., 1,4-butane diol) cyclizable to an unstrained ether using titanium dioxide catalysts that have prior to use:(1) a surface area of at least 70 square meters per gram (as determined by the BET method), and(2) the capability of chemically adsorbing at 100.degree. C. at least 35.times.10.sup.4 millimoles of gaseous ammonia per square meter of surface area.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: January 17, 1989
    Assignee: Ethyl Corporation
    Inventor: Duane C. Hargis
  • Patent number: 4762929
    Abstract: Saturated nitrogen-containing five-membered and six-membered heterocycles are aromatized by dehydrogenation in the gas phase in the presence of a supported palladium catalyst containing an alkaline earth metal halide, at from 150.degree. to 350.degree. C. and under from 0.1 to 10 bar.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: August 9, 1988
    Assignee: BASF Aktiengesellschaft
    Inventor: Walter Rebafka
  • Patent number: 4668691
    Abstract: 1-Oxo-1,3,4,7-tetrahydrobenzofuranes of the formula ##STR1## in which X is O or S,R is optionally substituted phenyl or heteroaryl,R.sup.1 is OH, monoalkylamino or dialkylamino, andR.sup.2 is an acyl or esterified carboxy radical, or pharmacologically acceptable salts thereof, which are active in circulation, e.g. they increase myocardial contractility, increase the flow of Ca.sup.2+ into the cell, increase blood pressure, reduce blood sugar, reduce swelling of mucous membranes and affect the salt and/or fluid balance.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: May 26, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Siegfried Goldmann, Matthias Schramm, G/u/ nter Thomas, Rainer Gross
  • Patent number: 4626592
    Abstract: Amines and amides are N,N-cyclodialkylated by reaction with an unstrained cyclic ether in the presence of a B-subgroup metal oxide alkylation catalyst, preferably a Group IV-B metal oxide such as titanium dioxide.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: December 2, 1986
    Assignee: Ethyl Corporation
    Inventor: Duane C. Hargis
  • Patent number: 4582575
    Abstract: Electrically conductive composites comprising a dielectric porous substance, e.g. fiberglass fabric, and a pyrrole polymer deposited in the pores of such substance. The composites are produced by contacting the porous substance with an anode in an electrolytic cell containing an electrolyte comprising a pyrrole monomer and a substantially non-nucleophilic anion such as bisulfate, and passing an electric current through the cell, thus electrochemically precipitating a conductive pyrrole polymer in the pores of such substance.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: April 15, 1986
    Assignee: Rockwell International Corporation
    Inventors: Leslie F. Warren, Dean S. Klivans, Louis Maus
  • Patent number: 4560769
    Abstract: Pyrroles are prepared by a process in which ammonia or an amine is reacted with a but-2-ene-1,4-diol in the presence of a supported catalyst containing copper, silver, zinc, palladium, nickel, cobalt and/or platinum and/or compounds of these metals as catalytic materials, and in the presence or absence of compounds of chromium and/or manganese as additional catalysts, in the gas phase.The pyrroles obtainable by the process of the invention are useful starting materials for the preparation of dyes, corrosion inhibitors, drugs and pesticides.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: December 24, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmuth Menig, Martin Fischer, Karl Baer
  • Patent number: 4548724
    Abstract: Dispersant additives in lubricating oils are formed by reaction of polyacids such as 1,3,6-hexane tricarboxylic acid and polyisobutenyl succinimide of a polyamine.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: October 22, 1985
    Assignee: Texaco Inc.
    Inventors: Thomas J. Karol, Rodney L. Sung, Benjamin J. Kaufman
  • Patent number: 4521602
    Abstract: A pyridine or a pyrrole is obtained in a one-stage process directly from an .alpha.,.omega.-dinitrile of appropriate carbon skeleton when the dinitrile is reacted in the gas phase with hydrogen, over a hydrogenation catalyst.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: June 4, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Rebafka, Gerd Heilen, Klaus Halbritter, Wolfgang Franzischka
  • Patent number: 4485243
    Abstract: A process is described for the catalytic gas phase reduction of 4-oxoalkanenitriles to form 2-alkylpyrroles in high yields and conversions.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: November 27, 1984
    Assignee: Stamicarbon B.V.
    Inventors: Roland E. van der Stoel, Petrus H. J. Janssen, Cornelis G. M. van de Moesdijk
  • Patent number: 4465678
    Abstract: Aminopropiophenone derivatives of the formula ##STR1## in which X is a keto group or an oxime radical of the formula>C.dbd.N--O--R.sup.4,Y each independently is an alkyl radical, a halogen atom, or a halogenoalkyl, alkoxy, alkythio, halogenoalkoxy, halogenoalkylthio, cycloalkyl or cyano radical,n is 0, 1, 2, or 3,R.sup.1 and R.sup.2 each independently is an alkyl radical, or,R.sup.1 and R.sup.2, together with the nitrogen atom to which they are bonded, complete an optionally substituted heterocyclic radical of the formula ##STR2## or in addition, if X is >C.dbd.N--O--R.sup.4, also may complete an optionally substituted heterocyclic radical of the formula ##STR3## R.sup.3 is a hydrogen atom or an alkyl radical, and R.sup.4 is a hydrogen atom or an alkyl, alkenyl, alkinyl or aralkyl radical,or physiologically acceptable acid addition salts thereof, which possess fungicidal activity.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: August 14, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Joachim Knops, Wolfgang Kramer, Paul-Ernst Frohberger
  • Patent number: 4417048
    Abstract: Organonitrogen compounds bearing a labile hydrogen atom directly bonded to a reactive nitrogen function, e.g., nitrogen heterocycles or substituted anilines, are N-alkylated with an N-alkylating agent in the presence of inorganic base and at least one sequestering agent having the structural formula:N--CHR.sub.1 --CHR.sub.2 --O--(CHR.sub.3 --CHR.sub.4 --O).sub.n --R.sub.5 ].sub.3 (I)wherein n is a number ranging from 0 to 10, R.sub.1, R.sub.2, R.sub.3, R.sub.4, which may be identical or different, each represents a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms, and R.sub.5 represents an alkyl or cycloalkyl radical having 1 to 12 carbon atoms, a phenyl radical, or a radical of the formula --C.sub.m H.sub.2m --.phi., or C.sub.m H.sub.2m+1 --.phi.--, m ranging from 1 to about 12 and .phi. being phenyl.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: November 22, 1983
    Assignee: Rhone-Poulenc Specialties Chimiques
    Inventors: Gerard Soula, Maurice Balme
  • Patent number: 4401545
    Abstract: Electrically conductive complexes of polypyrroles with nitroaromatic anions are prepared by polymerizing pyrrole, an N-alkylpyrrole and/or an N-arylpyrrole by anodic oxidation in a polar solvent, in the presence of a salt of an acidic nitroaromatic compound.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: August 30, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Naarmann, Dieter Naegele, Klaus Penzien, Johannes Schlag, Volker Kiener, Hugo Boehm
  • Patent number: 4374991
    Abstract: This invention relates to a method of using compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen, alkyl or alkenyl; R.sup.2 is hydrogen, alkyl, cycloalkyl or mononuclear aryl or R.sup.1 and R.sup.2, taken together with the carbon atom to which they are attached, form a cycloalkyl or cycloalkoxyalkyl; R.sup.3 is hydroxy, alkyl, alkoxycarbonyl, hydroxy lower alkyl or a radical of the formula: --C(.dbd.Y)NR.sup.4 R.sup.5 wherein R.sup.4 is hydrogen, alkyl, alkenyl, R.sup.5 is alkyl, alkenyl, alkoxyalkyl, carbalkoxy, mononuclear aryl, or R.sup.4 and R.sup.5 may be joined together with the nitrogen atom to which they are attached to form a 5 to 7 membered heterocyclic ring having from 1 to 3 hetero atoms; Y is O or S; X is alkyl, alkoxycarbonylalkyl or cyano; m is an integer of 0 to 2 and n and n' are integers each having a value of 1 to 2 and the dotted line indicates an optional double bond anywhere in the ring, compositions containing said compounds as insect repellents and to novel compounds.
    Type: Grant
    Filed: December 29, 1981
    Date of Patent: February 22, 1983
    Assignee: Rohm and Haas Company
    Inventor: Joel R. Smolanoff
  • Patent number: RE32896
    Abstract: Amines and amides are N,N-cyclodialkylated by reaction with an unstrained cyclic ether in the presence of a B-subgroup metal oxide alkylation catalyst, preferably a Group IV-B metal oxide such as titanium dioxide.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: March 28, 1989
    Assignee: Ethyl Corporation
    Inventor: Duane C. Hargis