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
selective semihydrogenation of alkynes to alkenes on shape‐controlled palladium (Pd) nanocrystals was performed. Pd nanocrystals with a cubic shape and thus exposed 100} facets were synthesized in an aqueous solution through the reduction of Na2PdCl4 with L‐ascorbic acid in the presence of bromide ions. The Pd nanocubes were tested as catalysts for the semihydrogenation of various alkynes such as 5‐decyne
Iron-catalyzed hydroaminocarbonylation of alkynes to produce succinimides with NH4HCO3
作者:Zijun Huang、Changsheng Tang、Zilong Chen、Shaofeng Pi、Zhengde Tan、Jiyong Deng、Yuehui Li
DOI:10.1016/j.jcat.2021.09.035
日期:2021.12
Succinimide derivatives are valuable compounds in synthesis of natural products and pharmaceuticals. A catalytic hydroaminocarbonylation reaction was developed for the synthesis of succinimides fromalkynes, CO and NH4HCO3. The novel transformation proceeds in the presence of Fe3(CO)12 without the need for expensive ligands or additives. Various substituted alkynes are selectively transformed into
Prop-2-ynyl- and propadienyl-lithium reagents. Regiocontrolled synthesis of allenic compounds
作者:Chanh Huynh、G�rard Linstrumelle
DOI:10.1039/c39830001133
日期:——
Direct proof for the rearrangement of the prop-2-ynyl-lithium (2) into the propadienyl-lithium (4) is provided by the formation of the 1,3-disubstituted alleniccompounds(7).
Bu2 iAlCl-Cp2TiCl2 ? A new reagent for hydroalumination of disubstituted acetylenes
作者:U. M. Dzhemilev、A. G. Ibragimov、I. R. Ramazanov、R. M. Sultanov、L. M. Khalilov、R. R. Muslukhov
DOI:10.1007/bf01431127
日期:1996.11
A new regio- and stereoselective method for the synthesis ofE-alkenylchloralanes based on Cp2TiCl2-catalyzed hydroalumination of disubstituted acetylenes by diisobutylaluminum chloride was developed. Hydrolysis and deuterolysis of organoaluminum compounds lead to the correspondingZ-olefins, and cross-coupling with ally) halides in the presence of Pd(Ph3P)4 results in the formation ofcis-4,5-disubstituted