Effective 1,5-stereocontrol in Pd(0)/InI promoted reactions of chiral N-Ts-4-vinylazetidin-2-ones with aldehydes. An efficient entry into nonracemic semi-protected (3Z)-2,6-anti-enediols

Abstract

ε-Amido-allylindiums generated in situ from N-Ts-4-vinylazetidin-2-ones in the presence of 2 eq. of InI and catalytic amounts of Pd(PPh₃)₄ react with a number of aromatic and aliphatic aldehydes with effective remote 1,5-stereocontrol to afford (3Z)-2,6-anti-enediols as major products in good yields and with excellent diastereoselectivity.