Disclosed herein is a process for the manufacture of (R)-phenylacetylcarbinol ((R)-PAC), (1R,2S). Ephedrine and its salts, (1R,2S)-norephedrine and its salts and 1-(Phenyl/Substituted phenyl)-2-(amino/alkylamino/dialklyamino) propan-1-ol and its salts, by enzymatic reduction of α-isonitrosopropiophenone (INP) and substituted α-isonitrosopropiophenone (substituted INP). The β-amino alcohols, produced by the process of present invention gives their corresponding diastereomers on Walden inversion. The present preparation process of (R)-PAC with (R)-PAC oxime as an intermediate has the advantage, that propiophenone as a key raw material which is easily available and has a low-price, operationally simple with high yield and a single process leading to the synthesis of several 1,2-aminoalcohol/ β- aminoalcohols active pharmaceutical ingredients. The design approach of the process is to reduce environmental impact of the product by comparing to the present manufacturing process.
本文披露了一种用于制备(R)-苯乙酰
甲醇((R)-
PAC)的过程,其中(R)-
PAC为(1R,2S)。通过对α-异硝基丙苯酮(INP)和取代的α-异硝基丙苯酮(取代INP)进行酶还原,制备(R)-
PAC、依非得林及其盐、(1R,2S)-去甲依非得林及其盐、1-(苯基/取代苯基)-2-(
氨基/烷基
氨基/二烷基
氨基)
丙醇及其盐。本发明的过程产生的β-
氨基醇在瓦尔登反转时会形成相应的对映异构体。本文介绍的(R)-
PAC制备过程以(R)-
PAC肟为中间体具有优势,即
丙酮苯作为一种关键原料易于获取且价格低廉,操作简单且收率高,并且通过单一过程合成多种1,2-
氨基醇/β-
氨基醇活性药物成分。该过程的设计方法旨在通过与现有制造过程相比减少产品对环境的影响。