Synthesis of Heterocyclic Ketene N,S- and N,O-Acetals with Ester Substituent in the Heterocyclic Ring
摘要:
Heterocyclic ketene N,S-acetals 3 or N,O-acetals 5 were synthesized by the reaction of ketene S,S-acetals 1 with cysteine ester hydrochloride 2 or serine ester hydrochloride 4 in the presence of a base.