Catalytic Asymmetric [4+2] Cyclization of Hydroxyphenyl Indolinone with Azlactone to Construct Spirooxindole δ‐Lactone
作者:Xuerui Wang、Weiwu Ren
DOI:10.1002/cjoc.202400777
日期:2024.12.15
An efficient asymmetric [4+2] cyclization of hydroxyphenyl indolinone with azlactone for the synthesis of spirooxindole δ-lactone has been developed, which realized the first asymmetric reaction of hydroxyphenyl indolinone. A series of intricate structures with congested vicinal quaternary chiral centers were provided in good yields with excellent enantioselectivities via the in situ generated o-QM