Synthesis of novel functionalized 3-spiropyrrolizidine and 3-spiropyrrolidine oxindoles from baylis-hillman adducts of isatin and heteroaldehydes with azomethine ylides via [3+2]-cycloaddition

A novel regioselective synthesis of a number of functionalized 3-spiropyrrolizidine and 3-spiropyrrolidine oxindoles from Baylis-Hillman adducts; of isatin and heteroaldehydes via [3+2] cycloaddition of azomethine ylides in excellent yields has been reported.