Catalytic asymmetric aza Diels–Alder reactions of hydrazones using a chiral zirconium catalyst
作者:Yasuhiro Yamashita、Yumiko Mizuki、Shū Kobayashi
DOI:10.1016/j.tetlet.2005.01.111
日期:2005.3
Catalyticasymmetric aza Diels–Alderreactions of acylhydrazones with Danishefsky’s dienes have been developed. A chiral zirconium complex derived from zirconium propoxide and 3,3′,6,6′-I4BINOL was found to be effective in this reaction, and the desired optically active 2,3-dihydro-4-pyridone derivatives were obtained with high enantioselectivities. Asymmetric formal synthesis of a natural product