Merging Photoredox and Nickel Catalysis: Decarboxylative Cross-Coupling of Carboxylic Acids with Vinyl Halides
作者:Adam Noble、Stefan J. McCarver、David W. C. MacMillan
DOI:10.1021/ja511913h
日期:2015.1.21
Decarboxylative cross-coupling of alkyl carboxylic acids with vinyl halides has been accomplished through the synergistic merger of photoredox and nickelcatalysis. This new methodology has been successfully applied to a variety of α-oxy and α-amino acids, as well as simple hydrocarbon-substituted acids. Diverse vinyl iodides and bromides give rise to vinylation products in high efficiency under mild
A Novel Synthesis of Internal Alkenyldialkylborane by the Reaction of 1-Halo-1-alkenyldialkylborane with Grignard Reagent
作者:Akira Arase、Masayuki Hoshi、Yuzuru Masuda
DOI:10.1246/bcsj.57.209
日期:1984.1
To synthesize internal alkenyldialkylboranes, coupling reactions were carried out by using 1-halo-l-alkenyldialkylboranes and Grignardreagents. Hydrogen peroxide oxidation and protonolysis with acetic acid of the reaction product revealed that internal (E)-alkenyldialkylborane was formed in 60–90% yield.
A new convenient procedure to prepare organomanganese reagents from organic halides and activated manganese
作者:Gérard Cahiez、Arnaud Martin、Thomas Delacroix
DOI:10.1016/s0040-4039(99)01331-3
日期:1999.8
A newmethod to obtain activated manganese metal, especially attractive for large scale preparativeorganicchemistry, is described. The key point is the use of 2-phenylpyridine as electron carrier to reduce manganese chloride by lithium. The active manganese thus obtained was used to prepare various organomanganese reagents from organic halides. The reactivity of these reagents has been studied (acylation
Nickel-Catalyzed Cross-Coupling Reactions of Alkyl Aryl Sulfides and Alkenyl Alkyl Sulfides with Alkyl Grignard Reagents Using (<i>Z</i>)-3,3-Dimethyl-1,2-bis(diphenylphosphino)but-1-ene as Ligand
A combination of nickel(II) acetylacetonate and (Z)-3,3-dimethyl-1,2-bis(diphenylphosphino)but-1-ene catalyzes cross-couplingreactions of alkyl aryl sulfides and alkenyl alkyl sulfides with alkyl Grignardreagents. Not only primary but also secondary alkyl Grignardreagents can be employed.
乙酰丙酮镍 (II) 和 (Z)-3,3-dimethyl-1,2-bis(diphenylphosphino)but-1-ene 的组合催化烷基芳基硫化物和烯基烷基硫化物与烷基格氏试剂的交叉偶联反应。不仅可以使用伯烷基格氏试剂而且可以使用仲烷基格氏试剂。
Highly Selective Reactions of Unbiased Alkenyl Halides and Alkylzinc Halides: Negishi-Plus Couplings
作者:Arkady Krasovskiy、Bruce H. Lipshutz
DOI:10.1021/ol201307y
日期:2011.8.5
High yielding stereo- and chemoselective Pd-catalyzed cross-couplings In THF at room temperature of alkenyl iodides and bromides with primary and secondary alkyl zinc iodides have been developed with the aid of N-methylmidazole as the key additive.