Radical Borylation/Cyclization Cascade of 1,6-Enynes for the Synthesis of Boron-Handled Hetero- and Carbocycles
作者:Shi-Chao Ren、Feng-Lian Zhang、Jing Qi、Yun-Shuai Huang、Ai-Qing Xu、Hong-Yi Yan、Yi-Feng Wang
DOI:10.1021/jacs.7b01889
日期:2017.5.3
construct boron-handled cyclic molecules was developed based on a radical borylation/cyclization cascade of 1,6-enynes. The process was initiated by the chemo- and regio-controlled addition of an N-heterocyclic carbene-boryl radical to an alkene or alkyne, followed by ring closure to afford boron-substituted cyclic skeletons. Further molecular transformations of the cyclic products to synthetically
Pendant Alkenes Promote Cobalt−Cobalt Bond Cleavage in (Alkyne)(binap)tetracarbonyldicobalt(0) Complexes
作者:Susan E. Gibson、Karina A. C. Kaufmann、Peter R. Haycock、Andrew J. P. White、David J. Hardick、Matthew J. Tozer
DOI:10.1021/om070022v
日期:2007.3.1
Heating (alkyne)(binap)tetracarbonyldicobalt(0) complexes bearing pendant alkenes leads to cleavage of the cobalt−cobalt bond and generation of the mononuclear hydride (binap)(CO)2CoH at 45−55 °C.
A Study of (Binap)(enyne)tetracarbonyldicobalt(0) Complexes
作者:Susan E. Gibson、David J. Hardick、Peter R. Haycock、Karina A. C. Kaufmann、Ayako Miyazaki、Matthew J. Tozer、Andrew J. P. White
DOI:10.1002/chem.200700587
日期:2007.8.27
Four (binap)(enyne)tetracarbonyldicobalt(0) complexes have been synthesised and their reactivity monitored by variable temperature (31)P NMR spectroscopy. Formation of (binap)dicarbonylhydridocobalt(-1) 12 occurred at temperatures between 35 and 55 degrees C, depending on the nature of the alkene and alkyne components of the enyne. The structure of 12 was determined by X-ray crystallography, and its