作者:R.G. Kostyanovsky、G.V. Shustov、N.L. Zaichenko
DOI:10.1016/0040-4020(82)85074-6
日期:1982.1
diaziridine 2c is rearranged in these conditions with ring-expansion. Complete asymmetric transformation has been found to take place on the formation of the solid phase of diastereomers 2d and 2j, and a closed cycle of diastereomeric transformations has been accomplished. Diaziridine 2g with chiral centres only at the nitrogen atoms has been obtained with the optical purity of 85.5% by resolution via
通过邻甲苯磺酰肟1a与炔丙基胺的反应,甘氨酸和(S)-α-丙氨酸的酯,β-乙酰氧基乙胺和β-二甲基氨基乙胺经官能团取代的3,3-双(三氟甲基)二氮丙啶2a-g具有已获得。在与更大体积的胺,(S)-苯丙氨酸Et酯,(R,S)-α-苯乙胺和叔丁胺的反应中,1a用作甲苯磺酸化试剂。重氮丙啶2e中的酯基很容易被酒精性碱皂化,而重氮丙啶2c在这些情况下,通过扩环重新排列。已经发现在非对映异构体2d和2j的固相的形成上发生了完全的不对称转化,并且已经完成了非对映异构转化的封闭循环。通过与d-(+)-樟脑-3-羧酸的盐5c拆分,获得了仅在氮原子上具有手性中心的二氮丙啶2g,其光学纯度为85.5%。(+)- 2g及其季盐(+)- 2h的绝对构型已从CD光谱中确定。旋光(-)- 2小时在1–10-樟脑磺酰基肟1b的基础上,还通过不对称合成获得了盐(光学纯度为2.0%)。根据2g,h消旋和2d,e,i,j,k