Intramolecular concerted insertion of vinyl cations into C-H bonds: hydroalkylating cyclization of alkynes with alkyl chloroformates to give cyclopentanes.
Biermann
Ursula
U
Institute of Pure and Applied Chemistry, University of Oldenburg, P.O. Box 2503, 26111 Oldenburg, Germany.
Koch
Rainer
R
Metzger
Jürgen O
JO