Oxygen Bonded Directly To A Benzene Ring Patents (Class 562/64)
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Patent number: 6841667Abstract: The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisomerically- and/or regioisomerically-enriched product. The present invention also relates to hydrolytic kinetic resolutions of racemic and diastereomeric mixtures of epoxides.Type: GrantFiled: July 7, 2003Date of Patent: January 11, 2005Assignee: President and Fellows of Harvard CollegeInventors: Eric N. Jacobsen, Makoto Tokunaga, Jay F. Larrow
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Patent number: 6800766Abstract: The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisomerically- and/or regioisomerically-enriched product. The present invention also relates to hydrolytic kinetic resolutions of racemic and diastereomeric mixtures of epoxides.Type: GrantFiled: July 26, 2002Date of Patent: October 5, 2004Assignee: President and Fellows of Harvard CollegeInventors: Eric N. Jacobsen, Makoto Tokunaga, Jay F. Larrow
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Patent number: 6448414Abstract: The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisomerically- and/or regioisomerically-enriched product. The present invention also relates to hydrolytic kinetic resolutions of racemic and diastereomeric mixtures of epoxides.Type: GrantFiled: July 5, 2001Date of Patent: September 10, 2002Assignee: President and Fellows of Harvard CollegeInventors: Eric N. Jacobsen, Makoto Tokunaga, Jay F. Larrow
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Patent number: 6262278Abstract: The present invention relates to a process for stereoselective or regioselective chemical synthesis which generally comprises reacting a nucleophile and a chiral or prochiral cyclic substrate in the presence of a non-racemic, chiral catalyst to produce a stereoisomerically- and/or regioisomerically-enriched product. The present invention also relates to hydrolytic kinetic resolutions of racemic and diastereomeric mixtures of epoxides.Type: GrantFiled: August 14, 1998Date of Patent: July 17, 2001Assignee: President and Fellows of Harvard CollegeInventors: Eric N. Jacobsen, Makoto Tokunaga, Jay F. Larrow
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Patent number: 6096889Abstract: An aromatic amino sulfonic acid compound is purified by a process including steps of:(a) dissolving the aromatic amino sulfonic acid compound in aqueous medium having a basic pH;(b) acidifying the aqueous medium with acetic acid to precipitate the aromatic amino sulfonic acid compound; and(c) removing the precipitated aromatic amino sulfonic acid compound from the aqueous medium.Using acetic acid in the process results in removal of more impurities and undesirable sulfate and chloride salts to provide an improved material for synthesizing dyes and pigments.Type: GrantFiled: June 1, 1999Date of Patent: August 1, 2000Assignee: BASF CorporationInventors: Kevin P. Cusack, Louis Molinsek
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Patent number: 5977173Abstract: The invention provides novel PGF analogs. In particular, the present invention relates to compounds having a structure according to the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, X, Y, and Z are defined below. This invention also includes optical isomers, diastereomers and enantiomers of the formula above, and pharmaceutically-acceptable salts, biohydrolyzable amides, esters, and imides thereof.The compounds of the present invention are useful for the treatment of a variety of diseases and conditions, such as bone disorders and glaucoma. Accordingly, the invention further provides pharmaceutical compositions comprising these compounds. The invention still further provides methods of treatment for bone disorders and glaucoma using theses compounds or the compositions containing them.Type: GrantFiled: September 4, 1998Date of Patent: November 2, 1999Inventors: John August Wos, Mitchell Anthony deLong, Jack S. Amburgey, Jr., Biswanath De, Haiyan George Dai, Yili Wang
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Patent number: 4948919Abstract: A process for the preparation of arylaminonitrophenyl hydroxyethyl sulfones of the formula (1) ##STR1## in which Z denotes the radical ##STR2## in which R.sub.1 denotes a hydrogen atom or an --NH.sub.2, --NH--R or --N(R).sub.2 group, R representing a C.sub.1 -C.sub.4 -alkyl group, R.sub.2 denotes a hydrogen atom, a C.sub.1 -C.sub.4 -alkyl group or a C.sub.1 -C.sub.4 -alkoxy group, R.sub.3 represents a hydrogen, chlorine or bromine atom or a sulfonic acid, sulfonamide, carboxylic acid, carboxamide, hydroxyl, carbomethoxy, carboethoxy or hydroxyethylsulfonyl group, R.sub.4 denotes a hydrogen, chlorine or bromine atom or a sulfonic acid, carboxylic acid, hydroxy or C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkyl group, it being possible for 1-3 different R.sub.1 -R.sub.3 substituents, not more than two of which may, however, be identical, to be present in the radical Z.sub.a, and for 1-4 different R.sub.1 -R.sub.Type: GrantFiled: January 24, 1989Date of Patent: August 14, 1990Assignee: Hoechst AktiengesellschaftInventors: Werner Brodt, Theodor Papenfuhs