Synthesis of <sup>15</sup>N-labeled heterocycles <i>via</i> the cleavage of C–N bonds of anilines and glycine-<sup>15</sup>N
作者:Jiwen He、Xingguo Zhang、Qiuqin He、Hao Guo、Renhua Fan
DOI:10.1039/d1cc01734a
日期:——
A nitrogen replacement process of anilines by glycine-15N via the cleavage of two C–N bonds for the synthesis of 15N-labeled aromatic heterocycles was reported.
addition-cyclization reactions of various 2-alkynylbenzenamines with CS2 lead to the formation of 2-mercapto-4-benzylidene-4H-benzo[d][1,3]thiazines under mild conditions. The reactions showed moderate to excellent yields and were highly regiospecific, and only the six-membered ring was generated via 6-exo-dig S-cyclization. The reaction can be transferred to highly functionalized 4-benzylidene-4H-benzo[d][1
在温和条件下,各种2-炔基苯甲胺与CS 2的串联加成环化反应导致形成2-巯基-4-亚苄基-4 H-苯并[ d ] [1,3]噻嗪。反应显示出中等至优异的产率,并且具有高度区域特异性,并且仅通过6- exo -dig S-环化生成六元环。该反应可通过CuI催化的交叉偶联和还原偶联反应转移至高度官能化的4-亚苄基-4 H-苯并[ d ] [1,3]噻嗪。
TBHP mediated oxidation of N-2-alkynylphenyl α-amino carbonyl compounds to oxalic amides using visible light photoredox catalysis and their application in the synthesis of 2-aryl indoles
Visible light promoted the oxidation of compounds 1 to amides 2 which were easily transferred to compounds 12.
可见光促进了化合物1氧化成酰胺2,酰胺2易转化成化合物12。
Pd(II)‐Catalyzed C−H Silylation of <i>o</i>‐Alkynylanilines Initiated by an Aminopalladation To Access Disilylated 2‐Phenyl‐1<i>H</i>‐indoles
作者:Yan Chen、Ling Zhu、Xuliang Tan、Xiahong Chen、Guobo Deng、Yun Liang、Yuan Yang
DOI:10.1002/adsc.202301119
日期:2024.1.30
Herein a Pd(II)-catalyzed C−H silylation of o-alkynylanilines with hexamethyldisilane for the synthesis of disilylated 2-phenyl-1H-indoles is reported. In this reaction, o-alkynylanilines undergo an aminopalladation, C−H activation, and dealkylation sequence to form five-membered C,C-palladacycles, which then couple with hexamethyldisilane to construct one C−N bond and two C−Si bonds. This method provides