Studies directed toward the synthesis of viridenomycin. Route 2: a second generation approach
摘要:
A second generation approach toward the synthesis of viridenomycin is described. Three key fragments of the molecule have been synthesized in stereochemically pure form. Initial studies toward the coupling of these fragments with the aim of assembling the macrocycle are detailed. Final efforts to reach the title compound are documented. (C) 2001 Elsevier Science Ltd. All rights reserved.
Rhodium-Catalyzed Vinylcyclopropanation/Cyclopentenation of Strained Alkenes via a Sequential Carborhodation Process
作者:Nai-Wen Tseng、Mark Lautens
DOI:10.1021/jo900039g
日期:2009.3.20
A rhodium-catalyzed reaction of dienylboronate esters with alkenes is described. Strained bicyclic alkenes show the highest reactivity toward the rhodium-catalyzed addition of the dienylboronate esters. Depending on the substitution pattern of dienylboronate esters, an intramolecular 1,6- or 1,4-addition mechanism may be operative, affording carbocycles containing a vinylcyclopropane or cyclopentene moiety.