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公开(公告)号:US5981267A
公开(公告)日:1999-11-09
申请号:US590530
申请日:1996-01-24
申请人: Chi-Huey Wong , Bernard Orsat , Wilna J. Moree , Shu Takayama
发明人: Chi-Huey Wong , Bernard Orsat , Wilna J. Moree , Shu Takayama
CPC分类号: C12P13/001 , C12P13/02
摘要: Racemic amines are enzymically converted by enantioselective carbamation to produce to chiral carbamates. Simple homocarbonates employed as substrates. The chiral carbamates may then be deprotected to yield the original amine in a chiral form. Alternatively, the chiral carbamates may be reduced so as to produce methylated chiral amines.
摘要翻译: 外消旋胺通过对映选择性氨基甲酸酯化反应生成手性氨基甲酸酯。 简单的碳酸氢盐用作底物。 然后将手性氨基甲酸酯脱保护,得到手性形式的原始胺。 或者,可以还原手性氨基甲酸酯以产生甲基化手性胺。
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公开(公告)号:US06215009B1
公开(公告)日:2001-04-10
申请号:US09484905
申请日:2000-01-18
IPC分类号: C07C5100
CPC分类号: C07C403/12 , C07C2601/16
摘要: The invention provides a process for the manufacture of a retinyl acylate of the formula I: wherein R1 is an optionally substituted C1-23-alkyl, a C2-23-alkenyl having 1 to 5 double bonds, an optionally aromatically substituted phenyl-C1-6-alkyl, or an optionally substituted phenyl. This process includes treating a compound of formula II: wherein R1 is defined above and R2 is hydrogen or COR1, with an agent that is an acid anhydride or a complex of sulfur trioxide in the presence of dimethylformamide. In addition to dimethylformamide, an aprotic organic solvent may optionally be present in the reaction. The products of the present invention are useful as intermediates for the manufacture of compounds of the vitamin A group or in certain cases as the compounds themselves.
摘要翻译: 本发明提供了制备式I的视黄酯酰化物的方法:其中R1是任选取代的C1-23-烷基,具有1至5个双键的C2-23-烯基,任选芳族取代的苯基-C1- 6-烷基或任选取代的苯基。 该方法包括在二甲基甲酰胺的存在下,使用作为酸酐或三氧化硫络合物的试剂处理式II化合物:其中R 1如上定义且R 2为氢或COR 1。 除了二甲基甲酰胺之外,非质子有机溶剂可以任选地存在于反应中。 本发明的产品可用作制造维生素A组的化合物或在某些情况下作为化合物本身的中间体。
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公开(公告)号:US5902738A
公开(公告)日:1999-05-11
申请号:US829280
申请日:1997-03-31
申请人: Bernard Orsat , Paul Spurr , Beat Wirz
发明人: Bernard Orsat , Paul Spurr , Beat Wirz
IPC分类号: C12N9/20 , C07C35/18 , C12P7/40 , C12P7/62 , C12P7/64 , C12P23/00 , C12P7/02 , C07C67/02 , C12N11/02
摘要: A process for making a compound of formula ##STR1## wherein R signifies a C.sub.1-23 -alkyl group or a C.sub.2-23 -alkenyl group containing 1 to 3 double bonds, comprising the steps of (a) reacting a compound of formula ##STR2## with an acylating agent which is in a mixture comprising (i) an organic solvent and (ii) a lipase which is present in suspension, so as to form the compound of formula I; and (b) recovering the compound of formula I is provided for. The process can be used to make (11Z,13Z)-7,10-dihydro-10-hydroxy-retinyl acetate, an starting material for the production of vitamin A acetate.
摘要翻译: 一种制备下式化合物的方法,其中R表示C1-23-烷基或含1〜3个双键的C2-23链烯基,包括以下步骤:(a)使式的化合物与酰化剂反应, 是在(i)有机溶剂和(ii)存在于悬浮液中的脂肪酶的混合物中,以形成式I化合物; 和(b)回收式I化合物。 该方法可用于制备(11Z,13Z)-7,10-二氢-10-羟基 - 视黄基乙酸酯,一种生产维生素A乙酸酯的原料。
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