Synthesis of 2-Pyrrolidinones by Palladium-Catalyzed [3+2] Cycloaddition of Isocyanates
作者:Rolf Breinbauer、Marko Kljajic、Thomas Schlatzer
DOI:10.1055/s-0037-1610692
日期:2019.3
Pd/DPEphos catalyzes the [3+2] cycloaddition of various alkyl isocyanates with 2-acetoxymethyl-3-allyltrimethylsilane as a synthetic equivalent of trimethylenemethane (TMM). Taking advantage of 2-acetoxymethyl-3-allyltrimethylsilane acting both as nucleophile as well as electrophile this reaction gives a convenient access to 5-ring lactams with an exocyclic alkene moiety. The formation of the β,γ-unsaturated