... R. C. Larock,* S. Varaprath, HH Lau, and C. A. Fellows Contribution from Iowa State University, Department of Chemistry, Ames, Iowa 5001 1. Received February 6, 1984 ... 0002-7863/84/1506- 5274$01.50/0 0 1984 American Chemical Society Page 2. ... Chem. SOC., Vol. 106, No. ...