Synthesis of (+)- and (−)-milnaciprans and their conformationally restricted analogs
作者:Satoshi Shuto、Shizuka Ono、Yukako Hase、Noriko Kamiyama、Akira Matsuda
DOI:10.1016/0040-4039(95)02221-x
日期:1996.1
converted to (+)-milnacipran [(+)-1], by which the absolute stereochemistry of (+)-1 was confirmed. (1S,2R)-1-Phenyl-2-[(S)-1-aminoethyl]-cyclopropane-N,N-diethylcarboxamindes (2), a conformationally restricted analog of 1, was also synthesized in high enantiomeric purity from 4. Starting from (S)-epichlorohydrin [(S)-5], their corresponding enantiomers, namely (−)-milnacipran [(−)-1] and ent-2, were
(R)-表氯醇[(R)-5 ]与苯乙腈(6)在NaNH 2的存在下在苯中的反应生成环丙烷衍生物,其被分离为内酯4 [(1 S,2 R)-2-氧-在氰基进行碱性水解后,96%ee的1-苯基-3-氧杂双环[3,1,0]己烷]的收率为67%。化合物4容易地转化为(+)-米那普仑[(+)- 1 ],由此证实了(+)- 1的绝对立体化学。(1 S,2 R)-1-苯基-2-[((S)-1-氨乙基]-环丙烷-N,N-diethylcarboxamindes(2),构象受限的1的类似物,还从4合成高对映体纯度。从(S)-表氯醇[(S)-5 ]开始,还合成了它们相应的对映异构体,即(-)-米那普仑[(-)- 1 ]和ent-2 。