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公开(公告)号:US5256816A
公开(公告)日:1993-10-26
申请号:US960989
申请日:1992-10-14
IPC分类号: C07B57/00 , C07C51/487
CPC分类号: C07C51/487 , C07B57/00
摘要: A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. In this process, the aryl-substituted aliphatic carboxylic acid is reacted with an inorganic base in the presence of an organic base to substantially enrich the precipitate in one of the enantiomers and an improved yield. Substantially pure, enantiomeric salt is separated, leaving a mother liquor comprising the solvent and aryl-substituted aliphatic carboxylic acid enriched in the other enantiomer.
摘要翻译: 描述了获得芳基取代的脂肪族羧酸的基本上纯的对映异构体的方法。 在该方法中,芳基取代的脂族羧酸在有机碱的存在下与无机碱反应,以使其中一种对映异构体中的沉淀物基本上富集,并提高了收率。 分离基本上纯的对映异构体盐,留下含有溶剂的母液和富集在另一对映异构体中的芳基取代的脂族羧酸。
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公开(公告)号:US5055235A
公开(公告)日:1991-10-08
申请号:US628331
申请日:1990-12-12
IPC分类号: B01J27/125 , B01J27/135 , C07B39/00 , C07B61/00 , C07C17/12 , C07C25/18 , C07C41/22 , C07C43/174 , C07C43/29 , C09K21/02 , C09K21/08
摘要: A process is disclosed for preparing a mixture of brominated, non-condensed ring polyaromatics, which process features multiple bromination temperatures and multiple catalyst additions for brominating the precursor non-condensed ring polyaromatic. The mixture has an average bromine number of about 6 to about 8 bromine atoms per molecule, a low melting point range, and a low amount of light end impurities.
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公开(公告)号:US5260482A
公开(公告)日:1993-11-09
申请号:US960990
申请日:1992-10-14
申请人: Patricia Pringle , William T. Murray , Douglas K. Thompson , Azfar A. Choudhury , Deepak R. Patil
发明人: Patricia Pringle , William T. Murray , Douglas K. Thompson , Azfar A. Choudhury , Deepak R. Patil
IPC分类号: C07B57/00 , C07C51/487
CPC分类号: C07C51/487 , C07B57/00
摘要: A process for obtaining a substantially pure enantiomer of an aryl-substituted aliphatic carboxylic acid is described. The process combines an aryl substituted aliphatic carboxylic acid, a base and water in an inert solvent to make a hydrated salt of the said acid. The process leads to enhanced yield of an enantiomerically enriched hydrated salt of the carboxylic acid.
摘要翻译: 描述了获得芳基取代的脂肪族羧酸的基本上纯的对映异构体的方法。 该方法将芳基取代的脂族羧酸,碱和水在惰性溶剂中混合以制备所述酸的水合盐。 该方法导致增加了对映体富集的羧酸水合盐的产率。
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