Cobalt-Catalyzed Cyclization/Hydroboration of 1,6-Diynes with Pinacolborane
作者:Qiang Huang、Meng-Yang Hu、Shou-Fei Zhu
DOI:10.1021/acs.orglett.9b02873
日期:2019.10.4
Herein, we report a protocol for cyclization/hydroboration of 1,6-diynes with pinacolborane using a cobalt catalyst generated in situ from a Co(II)-phenanthroline complex, tetrabutylammonium fluoride, and pinacolborane. This protocol, which features good functional group tolerance, a broad substrate scope, and excellent stereoselectivity, enables the synthesis of useful cyclic 1,3-dienylboron compounds
Herein, we successfully achieve this goal by employing a recyclable solid acid/ionicliquidcatalyst system. The dehydration of alkyl- and cycloalkyl-derived diols in an Amberlyst-15/[Emim]Cl system afforded the corresponding 1,3-dienes in good yields, while a Nafion/[Emim]Cl system was demonstrated to be a better catalyst system for the dehydration of aryl-substituted substrates. Our protocol features
The UV irradiation of aliphaticalcohols gave α-glycols as the principal products. The values of the dl-α-glycol ratios obtained in each example were analyzed.
脂肪族醇的紫外线照射得到α-二醇作为主要产物。分析在每个实施例中获得的dl -α-二醇比率的值。
Thermal decomposition of vinylic copper(I) and silver(I) organometallic compounds
作者:George M. Whitesides、Charles P. Casey、Jeanne K. Krieger
DOI:10.1021/ja00735a011
日期:1971.3
s'7-rr During these studies several-qroups have prepared and characterizecl authentic aromatic and vinylic organonretallic compounds of these me[als.'-r'r The thernial stability of this class of compounds , although low conrpared with the stabilities ol nrain group organometallic cotltpounds, appeared tu Lrs to be sullicient to make a derailed investigation ot' the ir thernral decom position a practical