申请人:Sumitomo Chemical Company, Limited
公开号:US05308820A1
公开(公告)日:1994-05-03
A catalyst for asymmetric induction is provided which comprises an amino acid amide derivative represented by the formula [I]: ##STR1## wherein R.sup.1 represents an isopropyl group, etc., R.sup.2 and R.sup.3 are the same or different and each represents a lower alkyl group, etc., R.sup.4 represents a chlorine atom, etc., R.sup.5, R.sup.6 and R.sup.7 are the same or different and each represents a hydrogen atom, etc., and * denotes an abosolute configuration of S or R, and a titanium (IV) alkoxide. Optically active cyanohydrins are obtained in high yield and at high purity by addition of hydrogen cyanide to aldehyde compounds in the presence of the above mentioned catalyst.
提供了一种不对称诱导催化剂,其包括由公式[I]表示的氨基酸酰胺衍生物:##STR1## 其中,R.sup.1表示异丙基基团等,R.sup.2和R.sup.3相同或不同,每个表示较低的烷基基团等,R.sup.4表示氯原子等,R.sup.5、R.sup.6和R.sup.7相同或不同,每个表示氢原子等,*表示S或R的绝对构型,以及钛(IV)烷氧基。在上述催化剂的存在下,将氢氰酸加入醛化合物中可高产率、高纯度地获得光学活性的氰基醇。