Stereoselective reactions of N-acyl-N,O-acetals with 2-(trimethysilyloxy)furan
摘要:
Reactions of acyclic chiral N-acyl-N,O-acetals with 2-(trimethylsilyloxy)furan and BF3.Et2O produces 4-(aminoalkyl)-2-buten-4-olides in 30% to 62% yield and variable diastereomeric excesses of the syn (threo) stereoisomer. Selectivity is dependent on the structure of N-acyl-N,O-acetal used.