Ligand-Controlled Regioselective Copper-Catalyzed Trifluoromethylation To Generate (Trifluoromethyl)allenes
作者:Brett R. Ambler、Santosh Peddi、Ryan A. Altman
DOI:10.1021/acs.orglett.5b01027
日期:2015.5.15
report the first example of a Cu-catalyzed trifluoromethylation reaction in which a ligand controls the regiochemical outcome. More specifically, we demonstrate the ability of bipyridyl-derived ligands to control the regioselectivity of the Cu-catalyzed nucleophilic trifluoromethylation reactions of propargyl electrophiles to generate (trifluoromethyl)allenes. This method provides a variety of di-
A metal‐free, room temperature protocol for the regioselectivechloroazidation of internalalkynes is disclosed. The reactions of internalalkynes with trimethylsilyl azide (TMSN3) in the presence of 1,3‐dichloro‐5,5‐dimethylhydantoin (DCDMH) afforded the corresponding chloroazidoalkenes in good yields. This reaction has good functional group tolerance and is operationally simple.
A palladium-catalyzed multicomponent reaction (MCR) of propargylic carbonates with isocyanides is reported. Remarkably, the orderly insertion of isocyanides affords two types of valuable N-heterocyclic products (Z)-6-imino-4,6-dihydro-1H-furo[3,4-b]pyrrol-2-amines and (E)-5-iminopyrrolones in high yields. Systematic analysis of the reaction conditions indicates that the selectivity of these N-heterocyclic
报道了炔丙基碳酸酯与异氰酸酯的钯催化的多组分反应(MCR)。值得注意的是,有序插入异氰酸酯可提供两种有价值的N-杂环产物(Z)-6-亚氨基-4,6-二氢-1 H-呋喃[3,4- b ]吡咯-2-胺和(E) -5-亚氨基吡咯烷酮产量高。反应条件的系统分析表明,这些N-杂环产物的选择性可以通过配体和温度控制。
作者:Feuerstein, Marie、Berthiol, Florian、Doucet, Henri、Santelli, Maurice
DOI:——
日期:——
Progress in Carbonylative [2+2+1] Cycloaddition: Utilization of a Nitrile Group as the π Component
作者:Takashi Iwata、Fuyuhiko Inagaki、Chisato Mukai
DOI:10.1002/anie.201305729
日期:2013.10.11
New tricks, old reactions: The treatment of 2‐(1,2‐propadienyl)phenylacetonitrile derivatives with a catalytic amount of [RhCl(CO)dppp}2] (dppp=1,3‐bis(diphenylphosphanyl)propane) under a CO atmosphere produced benzo[f]oxyindole derivatives (see scheme). This aza‐Pauson–Khand‐type reaction was applicable to aliphatic substrates, thus resulting in the formation of the azabicyclo[3.3.0]octadienone derivatives
新的技巧,旧的反应:在催化条件下处理催化量为[RhCl(CO)dppp} 2 ](dppp = 1,3-‐双(二苯基膦基)丙烷的2-(1,2-丙二烯基)苯基乙腈衍生物CO气氛下生成苯并[ f ]氧基吲哚衍生物(参见方案)。该aza-Pauson-Khand型反应适用于脂肪族底物,从而导致形成azabicyclo [3.3.0] octadienone衍生物。