申请人:Ciba-Geigy Corporation
公开号:US04785089A1
公开(公告)日:1988-11-15
The invention relates to novel sulfonic acid esters of formula I ##STR1## wherein R.sup.1 is C.sub.5 -C.sub.6 cycloalkyl which is unsubstituted or substituted by C.sub.1 -C.sub.7 alkyl, unsubstituted or substituted phenyl, R.sup.2 is C.sub.1 -C.sub.7 alkyl, R.sup.3 is phenyl which is substituted by halogen or nitro, and the asterisk denotes a carbon atom that is either present in the preponderant number of molecules in the S configuration or in the preponderant number of molecules in the R configuration. These compounds can be prepared by enantio-selective reduction of 4--R.sup.1 --substituted .alpha.-oxobutyric acid compounds and subsequent conversion of the resultant .alpha.-hydroxy group into the --OSO.sub.2 --R.sup.3 group. The compounds of formula I are suitable intermediates for the preparation of ACE inhibitors or precursors thereof.
本发明涉及公式I的新型磺酸酯化合物,其中R.sup.1是未取代或取代的C.sub.1-C.sub.7烷基、未取代或取代的苯基的C.sub.5-C.sub.6环烷基,R.sup.2是C.sub.1-C.sub.7烷基,R.sup.3是取代了卤素或硝基的苯基,星号表示一个碳原子,其在大多数分子中以S构型或R构型存在。这些化合物可以通过对4-R.sup.1-取代的α-羟基丁酸化合物进行对映选择性还原,然后将所得的α-羟基转化为-OSO.sub.2-R.sup.3基团来制备。公式I的化合物是制备ACE抑制剂或其前体的合适中间体。