lodocyclization of unsaturated tosylamides promoted by Oxone® oxidation of KI afforded, in good yields, N-tosyl iodopyrrolidines and piperidines. A new, simple method for the conversion of alcohols to tosylamides is presented.
通过 Oxone® 氧化 KI 促进的不饱和甲苯磺酰胺的碘环化以良好的收率提供了 N-甲苯磺酰基碘吡咯烷和哌啶。介绍了一种将醇转化为甲苯磺酰胺的简单新方法。
Stereochemical studies on the nucleophilic substitution in the reaction of allyl phosphates with organoaluminium reagents
The reaction of cis- or trans-5-isopropenyl-2-methyl-2-cyclohexenyl diethyl phosphate (I) with Me2AlX (X = OPh, SPh, NHPh) in hexane results in substitution of the -O-PO(OEt)2 group with X under predominant inversion. The solvent effects on the stereochemistry in these reactions have been disclosed.
Nickel-Catalyzed Enantioconvergent Reductive Hydroalkylation of Olefins with α-Heteroatom Phosphorus or Sulfur Alkyl Electrophiles
作者:Shi-Jiang He、Jia-Wang Wang、Yan Li、Zhe-Yuan Xu、Xiao-Xu Wang、Xi Lu、Yao Fu
DOI:10.1021/jacs.9b09415
日期:2020.1.8
bond formation reactions have been made in recent years through the use of transition-metal-catalyzed cross-couplingreactions of racemic secondary alkyl electrophiles with organometallic reagents. Herein, we report a general process for the asymmetric construction of alkyl-alkyl bonds adjacent to heteroatoms, namely, a nickel-catalyzed enantioconvergent reductive hydroalkylation of olefins with α-heteroatom