Palladium-catalysed ring-opening [3 + 2]-annulation of spirovinylcyclopropyl oxindole to diastereoselectively access spirooxindoles†
Xiu-Liang Cheng,Yu-Chun Li,Jin-Lian Li,Peng-Ju Xia,Hua Yang
Organic & Biomolecular Chemistry Pub Date : 11/29/2018 00:00:00 , DOI:10.1039/C8OB02859A
Abstract

A novel palladium-catalysed ring-opening [3 + 2]-annulation of spirovinylcyclopropyl oxindole with α,β-unsaturated nitroalkenes is reported. A series of spirooxindole derivatives were synthesized in high yields and good to excellent diastereoselectivities. This developed protocol offers a new and efficient pathway for the assembly of spirooxindoles.

Graphical abstract: Palladium-catalysed ring-opening [3 + 2]-annulation of spirovinylcyclopropyl oxindole to diastereoselectively access spirooxindoles