Cycloaddition reactions of allenes with N-phenylmaleimide. A two-step, diradical-intermediate process
作者:Daniel J. Pasto、Peter F. Heid、Steven E. Warren
DOI:10.1021/ja00377a022
日期:1982.6
e process. The stereochemical features controlling the formation of the stereoisomeric diradical intermediates and their ring closures are discussed. In addition to the cycloaddition processes, competitive ene reactions occur to produce intermediate dienes, which react further to produce 1:2 adducts or nonreactive alkyne-containing 1:1adducts. These ene reactions also appear to proceed via diradical