A NEW METHOD FOR ACCOMPLISHING ROBINSON-NAZAROV ANNELATIONS ... John E. Ellis, John S. Dutcher, and Clayton H. Heathcock* ... Berkeley, California 94120 Department of Chemistry, University of California ... Robinson annelations using ethyl 3-0x0-4-pentenoic acid 1 (gf?_zf?rwt_s reage”, 1) bonylcyclohexenones (eg, 2-+_4). are an important route to a-ethoxycar- 1 ... 71 Copyright@ 1974 by Marcel Dekker, Inc. All Rights Reserved. ...