[EN] A NOVEL METHOD FOR SYNTHESIS OF OPTICALLY PURE BETA-AMINO ALCOHOLS<br/>[FR] NOUVEAU PROCÉDÉ DE SYNTHÈSE DE BÊTA-AMINO ALCOOLS OPTIQUEMENT PURS
申请人:EMBIO LTD
公开号:WO2015198108A1
公开(公告)日:2015-12-30
A method for the preparation of β-amino alcohol of formula (III) in which R1 is Ph, (substituted) Ph, R2 is C1-8 alkyl or C4-6 cyclo alkyl, R3 = R4R5CHNH2 where, R4 = H, C1-8 alkyl, C4-6 cyclo alkyl, or - COOR6 (R6=C1-C8 alkyl); R5 = (subst) aryl], the method including subjecting an α-hydroxy ketone of formula (I) in which R1 and R2 are as defined above is reacted with a chiral amine of formula R3NH2 where R3 = R4R5CH- where, R4 = H, C1-8 alkyl, C4-6 cycloalkyl, or - COOR6 (R6=C1-8 alkyl), R5 = (subst) aryl] to produce a compound of formula (II) in which R1, R2 and R3 are as defined above, followed by reduction to form the compound of formula (III).
The stereodivergent synthesis of variously substituted norephedrines has been attained starting from the cheap and commercially available corresponding aromatic aldehydes through a bi-enzymatic synthetic sequence. In the first step, a benzoin-type condensation is mediated by the (S)-selective acetoin:dichlorophenolindophenol oxidoreductase (Ao:DCPIP OR), while in the second step either a (R)- or a
各种取代的去甲麻黄碱的立体发散合成已经通过双酶合成序列从廉价且市售的相应芳香醛开始实现。在第一步中,安息香型缩合由 ( S )-选择性乙偶姻:二氯苯酚靛酚氧化还原酶 (Ao:DCPIP OR) 介导,而在第二步中,则由 ( R )- 或 ( S )-氨基转氨酶 ( ATA)用于进行氨基转移并获得最终产品。 14 种底物阵列与 6 种不同的 ATA 相结合,并根据转化率和对映体过量对产品进行了表征。
A NOVEL METHOD FOR SYNTHESIS OF OPTICALLY PURE BETA-AMINO ALCOHOLS
申请人:Embio Limited
公开号:EP3160937A1
公开(公告)日:2017-05-03
(<i>S</i>
)-Selectivity in Phenylacetyl Carbinol Synthesis Using the Wild-Type Enzyme Acetoin:Dichlorophenolindophenol Oxidoreductase from <i>Bacillus licheniformis</i>
作者:Pier Paolo Giovannini、Lindomar Alberto Lerin、Michael Müller、Giovanni Bernacchia、Morena De Bastiani、Martina Catani、Graziano Di Carmine、Alessandro Massi
DOI:10.1002/adsc.201600359
日期:2016.9.1
well known biocatalysts for the asymmetric synthesis of α‐hydroxy ketones with preferential (R)‐selectivity. Pharmaceutically relevant phenylacetyl carbinol (PAC) has been prepared with absolute (S)‐configuration only on a few occasions using enzyme variants suitably designed through rational site‐directed mutagenesis approaches. Herein, we describe the synthesis of (S)‐phenylacetyl carbinol products with