Affiliation:
1. Department of Chemistry University of Science and Technology of China 230026 Hefei Anhui P. R. China
Abstract
AbstractMethylenecyclobutenes are useful precursors to provide other organic compounds. We report intermolecular [2+2] cycloaddition of allene ethers and alkynes at 100 °C, which gives methylenecyclobutenes in 50–60 % yields. The reaction does not require any metal catalyst and shows broad substrate scope, high regioselectivity and high stereoselectivity.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities