申请人:Snam Progetti S.p.A.
公开号:US04053521A1
公开(公告)日:1977-10-11
A prochiral or racemic substrate such as a prochiral ketone is converted into an optically active product through a process wherein said substrate is subjected to an asymmetric hydrogen transfer reaction by means of an optically active amino-alane or polyimino-alane represented by the formula H.sub.2 AlNR.sub.1 R.sub.2, H Al(NR.sub.1 R.sub.2).sub.2 or (H AlNR).sub.n wherein R, R.sub.1 and R.sub.2 are alkyl, aryl or cycloalkyl radicals, n is an integer higher than 4, and which contains an Al -- N direct bond and an Al -- H bond per aluminum atom, and the third substituent bound to aluminum is halogen, --H, ##STR1## or --OR wherein R has the aforesaid meaning, and wherein the asymmetry center is constituted by a primary or secondary amine group containing an optically active alkyl radical.
一个具有手性中心或外消旋底物,如一个具有手性中心的酮,通过一种过程转化为光学活性产物,在该过程中,所述底物经历一个不对称氢转移反应,该反应通过一种由代表为公式H.sub.2 AlNR.sub.1 R.sub.2、H Al(NR.sub.1 R.sub.2).sub.2或(H AlNR).sub.n的光学活性氨基铝或聚亚氨基铝来实现,其中R、R.sub.1和R.sub.2是烷基、芳基或环烷基基团,n是大于4的整数,且其中包含每个铝原子的一个Al-N直接键和一个Al-H键,铝键合的第三个取代基是卤素、-H、##STR1##或-OR,其中R具有上述含义,并且不对称中心由含有光学活性烷基基团的一级或二级胺基团构成。