Rh-Catalyzed Enantioselective Diboration of Simple Alkenes: Reaction Development and Substrate Scope
摘要:
The rhodium-catalyzed reaction between bis(catecholato)diboron and simple alkenes results in the syn addition of the diboron across the alkene. The resulting 1,2-bis(boronate) is subsequently oxidized to provide the 1,2-diol. In the presence of enantiomerically enriched Quinap ligand, high enantioselection in the diboration can be achieved. The reaction is highly selective for trans- and trisubstituted alkenes and can be selective for some monosubstituted alkenes as well. The development of this reaction is described as is the substrate scope and experiments that are informative about the reaction mechanism and competing pathways.
Rhodium catalysed diboration of unstrained internal alkenes and a new and general route to zwitterionic [L2Rh(η6-catBcat)] (cat = 1,2-O2C6H4) complexes†
作者:Chaoyang Dai、Todd B. Marder、Edward G. Robins、Dmitri S. Yufit、Judith A. K. Howard、Todd B. Marder、Andrew J. Scott、William Clegg
DOI:10.1039/a804710c
日期:——
Reactions of [L2Rh(acac)] (L = alkene or phosphine) with B2cat3 yield the zwitterionic complexes [L2Rh(η6-catBcat)] and [(acac)Bcat] cleanly; [(dppm)Rh(η6-catBcat)], the X-ray structure of which is reported, is an excellent catalyst for the diboration of vinylarenes and unstrained internal alkenes cis- and trans-stilbene and trans-β-methylstyrene.
Gold(0) Nanoparticles for Selective Catalytic Diboration
作者:Jesus Ramírez、Mercedes Sanaú、Elena Fernández
DOI:10.1002/anie.200800541
日期:2008.6.27
[EN] CATALYZED ENANTIOSELECTIVE TRANSFORMATION OF ALKENES<br/>[FR] TRANSFORMATION ENANTIO-SELECTIVE CATALYSEE D'ALCENES
申请人:UNIV NORTH CAROLINA
公开号:WO2005012209A3
公开(公告)日:2005-08-11
Rh-Catalyzed Enantioselective Diboration of Simple Alkenes: Reaction Development and Substrate Scope
作者:Stéphane Trudeau、Jeremy B. Morgan、Mohanish Shrestha、James P. Morken
DOI:10.1021/jo051651m
日期:2005.11.1
The rhodium-catalyzed reaction between bis(catecholato)diboron and simple alkenes results in the syn addition of the diboron across the alkene. The resulting 1,2-bis(boronate) is subsequently oxidized to provide the 1,2-diol. In the presence of enantiomerically enriched Quinap ligand, high enantioselection in the diboration can be achieved. The reaction is highly selective for trans- and trisubstituted alkenes and can be selective for some monosubstituted alkenes as well. The development of this reaction is described as is the substrate scope and experiments that are informative about the reaction mechanism and competing pathways.