A simple and efficient synthesis of cyclopentadienones via palladium-catalyzed cyclocarbonylation of alkynes under atmosphericpressure of carbonmonoxide has been developed. The transformation was carried out under mild and ligand-free conditions, a wide range of substrates and exceptional functional group tolerance.
Rhodium-Catalyzed Carbonylative Synthesis of Benzosilinones
作者:Bo Chen、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b00930
日期:2019.4.19
In this work, a novel and practical procedure for the synthesis of benzosilinones by carbonylative cyclization has been developed. Various benzosilinones were isolated in moderate to good yields, using rhodium as the catalyst with good functional group tolerance. Not only symmetric alkynes but also nonsymmetric alkynes are applicable with excellent regioselectivity and good yields. Remarkably, this
The in situ generation of a “cyano” unit from readily available organic precursors is of high interest in synthetic chemistry. Herein, we report the first example of Ni-mediated dehydration of formamide to form “CN” and its subsequent catalytic applications in the hydrocyanation of alkynes and cyanation of aryl halides. Formamide can serve as a convenient source for the nitrile unit, in that it releases
作者:Sorin Staicu、Ilie G. Dinulescu、Filip Chiraleu、Margaret Avram
DOI:10.1016/s0022-328x(00)87216-2
日期:1976.9
The synthesis of ortho-substituted diphenylacetylenes and their behaviour toward dichlorobis(benzonitrile)palladium(II) are described. The influence of steric factors on the oligomerization is discussed.