Enantiomerically pure (R)- or (S)-1,1-dialkoxy-2-propanamines 5 are obtained in good chemical and optical yields, by asymmetric reduction of chiral imines prepared from 1,1-dialkoxy-2-propanones, using (R)- or (S)-1-phenylethylamine ((R)- or (S)-2) as an inexpensive, efficient chiral auxiliary.
通过使用廉价高效的(R)- 或(S)-1-苯
乙胺((R)- 或(S)-2)作为手性辅助剂,对由1,1-二烷氧基-2-
丙酮制备的手性
亚胺进行不对称还原,可以以良好的
化学和光学产率获得纯的(R)- 或(S)-1,1-二烷氧基-
2-丙胺5。