Enantiopure β-methoxy carboxyl derivatives from a chiral titanium enolate and dimethyl acetals
摘要:
Lewis acid-mediated reaction of the titanium enolate arising from (S)-N-acetyl-4-isopropyl-1,3-thiazolidine-2-thione with dimethyl acetals furnishes beta -methoxy carboxyl adducts in good yields and stereoselectives. The adducts can be, in turn, transformed into a wide range of enantiopure alpha -unsubstituted beta -methoxy carboxyl derivatives in excellent yields. (C) 2001 Elsevier Science Ltd. All rights reserved.
Enantiopure β-methoxy carboxyl derivatives from a chiral titanium enolate and dimethyl acetals
摘要:
Lewis acid-mediated reaction of the titanium enolate arising from (S)-N-acetyl-4-isopropyl-1,3-thiazolidine-2-thione with dimethyl acetals furnishes beta -methoxy carboxyl adducts in good yields and stereoselectives. The adducts can be, in turn, transformed into a wide range of enantiopure alpha -unsubstituted beta -methoxy carboxyl derivatives in excellent yields. (C) 2001 Elsevier Science Ltd. All rights reserved.