Hydrogen Bonded To A Benzene Ring Is Replaced By Carbon Patents (Class 558/376)
  • Patent number: 10577307
    Abstract: A task is to provide a method for producing a polycyclic aromatic aminophenol compound through a reduced number of steps at a low cost with high safety. The method for producing a polycyclic aromatic aminophenol compound includes the step of reacting a compound represented by the general formula (1) below and an aromatic amino compound with each other: Wherein n represents an integer of 1 to 8, Ar represents a benzene ring optionally having a substituent, or a naphthalene ring optionally having a substituent, each of R1 and R2 independently represents a hydrogen atom, a hydrocarbon group having 1 to 6 carbon atoms and optionally having a substituent, or an aromatic group optionally having a substituent, and R3 represents a hydroxyl group, a methoxy group, or a halogen atom.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: March 3, 2020
    Assignee: DIC Corporation
    Inventors: Kazuo Arita, Tomohiro Shimono, Junji Yamaguchi
  • Patent number: 5672728
    Abstract: An electrophotographic photoconductor comprises an electroconductive substrate and a photoconductive layer formed thereon comprising as an effective component at least one pyrenylamine derivative of formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, w, j, k, l, m and n are specifically defined in the specification. Furthermore, a novel pyrenylamine derivative for use in the above electrophotographic photoconductor, an aldehyde compound, which is an intermediate for producing the pyrenylamine derivative, and methods of preparing the pyrenylamine derivative and the aldehyde compound are disclosed.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: September 30, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Chiaki Tanaka, Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada, Hiroshi Adachi
  • Patent number: 5214186
    Abstract: A process for the preparation of arylidene dyes comprises the reaction of an aromatic amine with an enolate salt of a formylated active methylene compound in the presence of a sulfonyl halide compound. An enol sulfonate is postulated as a reactive intermediate in the reaction. The process gives high yields of products under mild reaction conditions and allows the use of aromatic groups containing substituents such as hydroxy that lead to side reactions and low product yields with previously known methods for making arylidene dyes.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: May 25, 1993
    Assignee: Eastman Kodak Company
    Inventor: Leslie Shuttleworth
  • Patent number: 5072017
    Abstract: Para-substituted o-benzylphenols are prepared by reacting p-substituted phenols with benzylating agents in the presence of zeolites of the faujasite type at elevated temperature.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 10, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Buysch, Gunter Klug, Peter Mues, Lothar Puppe
  • Patent number: 5026912
    Abstract: A process for selectively producing ortho-alkylated aromatic amines in high selectivity relative to N-alkylated aromatic amines. The process comprises reacting an aromatic amine, having at least one hydrogen atom in a position ortho to the amine functionality, and an olefin under conditions sufficient to effect an alkylation reaction, in the presence of a zeolite catalyst which has been thermally pretreated by heating the catalyst to a temperature greater than about 500.degree. C. for a period ranging from 0.5 to about 10 hours while sweeping an inert gas over the heated catalyst to remove water and ammonia formed during the thermal treatment, and subsequently recovering the alkylated aromatic amine.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: June 25, 1991
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Rakesh Agrawal, Steven R. Auvil
  • Patent number: 4824989
    Abstract: A (trifluoromethyl)naphthalene which has been prepared by reacting a halonaphthalene with a trifluoroacetate salt in the presence of cuprous iodide and a dipolar aprotic solvent is recovered by (1) replacing the dipolar aprotic solvent in the final reaction mixture with an alkane containing 6-12 carbons, (2) heating the resultant slurry to a temperature sufficient to dissolve the organic ingredients, (3) allowing the inorganic ingredients of the slurry to settle, (4) decanting the organic layer, and (5) cooling to precipitate the (trifluoromethyl)naphthalene.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: April 25, 1989
    Assignee: Ethyl Corporation
    Inventor: Gary D. Heidebrecht
  • Patent number: 4824988
    Abstract: In a process for preparing a (trifluoromethyl)napthalene by reacting a halonapthalene with a trifluoroacetate in the presence of cuprous iodide and a dipolar aprotic solvent and separating out the inorganic ingredients of the final reaction mixture in the recovery of the product, the cuprous iodide is recovered by washing the separated inorganic ingredients with an alcohol and a carboxylic acid and then with water to purify the cuprous iodide.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: April 25, 1989
    Assignee: Ethyl Corporation
    Inventors: Ronny W. Lin, Venkataraman Ramachandran
  • Patent number: 4774331
    Abstract: A process for ortho-cyanation of phenols or phenylamines which comprises reacting a phenyl compound having hydroxy or optionally substituted amino or cyclic amino, of which ortho position is vacant, with trichloroacetonitrile, C.sub.1 -C.sub.5 alkyl thiocyanate or C.sub.6 -C.sub.12 aryl thiocyanate in the presence of a boron trihalide and treating the resultant product with an alkali is provided, and said process is useful in the synthesis of intermediates for medicinals or pesticides.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: September 27, 1988
    Assignee: Shionogi & Co., Ltd.
    Inventors: Makoto Adachi, Hiromu Matsumura, Tsutomu Sugasawa
  • Patent number: 4760184
    Abstract: This invention relates to a process for producing ring alkylated aromatic amines. In accordance with this process an aromatic amine is reacted with an olefin, diolefin or an alcohol using a non-zeolitic molecular sieve as a catalyst. Under the conditions of the process the catalyst is extremely active, and with aromatic amines that are capable of alkylation at the ortho and para positions, high selectivity to the ortho alkylated isomer can be achieved.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: July 26, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Ronald Pierantozzi