Stereoselective synthesis of α,α-disubstituted amines by a sequential nucleophilic addition to O-protected cyanohydrins
摘要:
The first enantioselective double nucleophilic addition reaction to O-protected cyanohydrin was achieved in 71% yield and 82:18 enantiomeric ratio by using a bis(BINOL)titanium Lewis acid complex. New (4S,5S)-2,2-dialkyl-4,5-bis(hydroxymethyl)-1,3-dioxolane titanium complexes were synthesized and they displayed good levels of enantioselection in the nucleophilic addition reaction. (C) 1999 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of α,α-disubstituted amines by a sequential nucleophilic addition to O-protected cyanohydrins
摘要:
The first enantioselective double nucleophilic addition reaction to O-protected cyanohydrin was achieved in 71% yield and 82:18 enantiomeric ratio by using a bis(BINOL)titanium Lewis acid complex. New (4S,5S)-2,2-dialkyl-4,5-bis(hydroxymethyl)-1,3-dioxolane titanium complexes were synthesized and they displayed good levels of enantioselection in the nucleophilic addition reaction. (C) 1999 Elsevier Science Ltd. All rights reserved.