Intramolecular Heck Reactions for the Synthesis of the Novel Antibiotic Mensacarcin: Investigation of Catalytic, Electronic and Conjugative Effects in the Preparation of the Hexahydroanthracene Core
作者:Lutz F. Tietze、Scott G. Stewart、Marta E. Polomska
DOI:10.1002/ejoc.200400786
日期:2005.5
The intramolecular Heck reaction of the three complex diphenyl substrates rac-2, 5 and rac-6, containing substituents with different electronic and conjugative properties, were examined. The Pd compounds [Pd2(dba)3]/[(tBu)3PH]BF4, [Pd2(OAc)2P(o-Tol)3}2] (4), [PdCl2(PPh3)2] and Pd(OAc)2 were used as catalysts. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
研究了三种复杂的二苯基底物 rac-2、5 和 rac-6 的分子内 Heck 反应,这些底物含有具有不同电子和共轭性质的取代基。Pd 化合物 [Pd2(dba)3]/[(tBu)3PH]BF4、[Pd2(OAc)2P(o-Tol)3}2] (4)、[PdCl2(PPh3)2] 和 Pd( OAc)2用作催化剂。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)