(PCy3)2Cl2RuCHPh Catalyzed Kharasch additions. Application in a formal olefin carbonylation
摘要:
(PCy3)(2)Cl2Ru=CHPh-catalyzed Kharasch additions of trihaloalkanes across olefins provide polyhalogenated adducts, which upon hydrolysis furnish alpha,beta-unsaturated ketones, aldehydes, or gamma-hydroxybutenolides. This two-step process represents an overall acylation or carbonylation of an olefin. (C) 2004 Elsevier Ltd. All rights reserved.
A half-sandwich 1,2-azaborolyl (Ab) ruthenium complex, (Ab–CCPh)RuCl(PPh3)2 (1), has been synthesized by treating RuCl2(PPh3)3 with lithium 1,2-azaborolide L-1, or by treating either RuCl2(PPh3)3 or RuHCl(PPh3)3 directly with 1,2-azaborole LH-1. It is evaluated as a suitable precatalyst in [2 + 2] cycloadditions of norbornene derivatives with DMAD and in atom transfer radical additions of halogenated compounds with olefins.
(PCy3)2Cl2RuCHPh Catalyzed Kharasch additions. Application in a formal olefin carbonylation
作者:Belinda T. Lee、Thomas O. Schrader、Belén Martı́n-Matute、Christopher R. Kauffman、Peng Zhang、Marc L. Snapper
DOI:10.1016/j.tet.2004.06.066
日期:2004.8
(PCy3)(2)Cl2Ru=CHPh-catalyzed Kharasch additions of trihaloalkanes across olefins provide polyhalogenated adducts, which upon hydrolysis furnish alpha,beta-unsaturated ketones, aldehydes, or gamma-hydroxybutenolides. This two-step process represents an overall acylation or carbonylation of an olefin. (C) 2004 Elsevier Ltd. All rights reserved.