Sonogashira Coupling of 2-Iodo-2-cycloalkenones: Synthesis of (+)- and (−)-Harveynone and (−)-Tricholomenyn A
作者:Michael W. Miller、Carl R. Johnson
DOI:10.1021/jo962295y
日期:1997.3.1
Strictly Regiocontrolled α-Monosubstitution of Cyclic Carbonyl Compounds with Alkynyl and Alkyl Groups via Pd-Catalyzed Coupling of Cyclic α-Iodoenones with Organozincs
derivatives readily undergo Pd-catalyzed cross coupling with α-iodoenones. Although (s-Bu)2Zn also undergoes Pd-catalyzed cross coupling, only the n-Bu-substituted products were obtained. α-Benzylation and α-homobenzylation can proceed satisfactorily, whereas allylzinc and propargylzinc derivatives undergo only addition to the carbonyl group. Although some promising results have been obtained in α-homoallylation