Alkene homologation <i>via</i> visible light promoted hydrophosphination using triphenylphosphonium triflate
作者:Vitalij V. Levin、Alexander D. Dilman
DOI:10.1039/d0cc07025d
日期:——
A hydrophosphination reaction of alkenes with triphenylphosphonium triflate under photocatalytic conditions is described. The reaction is promoted by naphthalene-fused N-acylbenzimidazole and is believed to proceed through intermediate formation of a phosphinyl radical cation. The resulting phosphonium salts are directly involved in the Wittig reactionleading to homologated alkenes.
Palladium-catalyzed intermolecular Heck reaction of alkyl halides
作者:Yinjun Zou、Jianrong (Steve) Zhou
DOI:10.1039/c4cc00297k
日期:——
An efficient Pd-catalyzed method for intermolecular Heck reaction of common alkyl halides is described for the first time.
第一次描述了一种高效的Pd催化方法,用于常见烷基卤代烃的分子间Heck反应。
Hydroalkylation of terminal aryl alkynes with alkyl diacyl peroxides
作者:Yougui Li、Liang Ge、Bo Qian、Kaki Raveendra Babu、Hongli Bao
DOI:10.1016/j.tetlet.2016.11.020
日期:2016.12
A photo and nickel co-catalyzed hydroalkylation of terminal aryl alkynes enabled Z-preferred olefin synthesis has been developed under mild conditions. Alkyl diacyl peroxides were utilized as a new type of alkylation reagents and afforded Z-olefins as the major products in moderate to good yields.
Highly stereoselective heterogeneous palladium-catalyzed transfer semihydrogenation of internal alkynes to access <i>cis</i>-alkenes
作者:Wencheng Huang、Jianying Li、Qiurong Chen、Mingzhong Cai
DOI:10.1177/1747519819855895
日期:2019.5
palladium-catalyzed transfer semihydrogenation of internalalkynes was achieved in dimethylformamide at 145 ºC by using an MCM-41-immobilized bidentate nitrogen palladium(II) complex [MCM-41-2N-Pd(OAc)2] as catalyst and dimethylformamide/KOH as hydrogen source, yielding a variety of cis-alkenes in good to high yields with excellent stereoselectivity. This supported palladium catalyst can be easily recovered by filtration
通过使用 MCM-41 固定的双齿氮钯 (II) 配合物 [MCM-41-2N-Pd(OAc)2] 作为催化剂和二甲基甲酰胺/KOH作为氢源,以良好的收率和高的立体选择性产生各种顺式烯烃。这种负载型钯催化剂可以通过过滤反应溶液轻松回收,并以几乎一致的活性循环使用多达七次。