Alfred Viola John H. MacMillan.
A Novel Steric Effect in the Thermolysis of Prop-2-ynyl Vinyl Carbinols, Google DocsThe formation of both acetylvinylcyclopropane and 4-acetylcyclopentene during the thermolysis of 3-methylhex-1-en-5-yn-3-ol has been verified and the mechanistic discontinuity can be interpreted on the basis of a torsional effect in the transition state