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.
Perceptible Influence of Pd and Pt Heterocyclic Carbene-Pyridyl Complexes in Catalytic Diboration of Cyclic Alkenes
作者:Cristina Pubill-Ulldemolins、Carles Bo、Jose A. Mata、Elena Fernández
DOI:10.1002/asia.200900580
日期:2010.2.1
No strain, no gain: Bis(catecholato)diboron was added to cyclicalkenes with internal strain to selectively form bis(boryl)cycloalkanes quantitatively in the presence of [Pd(NHC)pyCl2], [Pd(NHC)pyI2], and [Pt(NHC)pyI2] (NHC=N‐heterocyclic carbene, py=pyridyl), which have been synthesized and characterized for the first time in this study.