... 6803 Mario D. Bachi,* Eric Bosch, Daniella Denenmark, and Diana Girsh Department of Organic Chemistry, The Weizmann Institute of Science, Rehovot 76100, Israel Received May 21, 1992 ... Page 3. Tributylstannane-Mediated Cyclization J. Org. Chem., Vol. 57, No. ...