Oxidation of 1-[(aryl)(phenylseleno)methyl]-, 1-[(aryl)(arylthio)-(phenylseleno)methyl]-, and l-[(aryl)(diphenylseleno)methyl]benzotriazoles with<i>m</i>-chloroperbenzoic acid
作者:Yoon Ho Kang、Kyongtae Kim
DOI:10.1002/jhet.5570340617
日期:1997.11
During the last decade, benzotriazole (1) has received much attention as an excellent synthetic auxiliary [1]. Recently Katritzky, et al. [2] studied the oxidation of 1-(phenylthiomethyl)benzotriazole (2a) and 1-(2-phenyl-1-phenylthioethyl)benzotriazole (2b) and obtained their sulfones and sulfoxides by treatment with wj-chloroperbenzoic acid (m-CPBA) and sodium periodate, respectively. No compounds
Convenient and Stereoselective Synthesis of Symmetrical (E)-Stilbenes via Homocoupling of 1,3-Dibenzylbenzotriazolium Bromides
作者:Xiaohui Xiao、Daqin Lin、Shuitian Tong、Hong Luo、Yinfeng He、Hailan Mo
DOI:10.1055/s-0030-1260814
日期:2011.7
Using NaH as the base and DMSO as the solvent, a series of symmetric (E)-stilbenes were prepared in good yields via the homocoupling of 1,3-dibenzylbenzotriazolium bromides at room temperature.
以 NaH 为碱基,DMSO 为溶剂,在室温下通过 1,3-二苄基苯并三唑溴化物的均偶联反应制备了一系列对称 (E)- 二苯乙烯,收率良好。
Transition-metal-free synthesis of (Z)-N1-vinyl-benzotriazoles from 1-arylmethylbenzotriazoles and arylaldehydes
作者:Jianyang Chen、Yuehong Deng、Hongmei Fu、Hui Yun、Huamei He
DOI:10.1016/j.tet.2023.133625
日期:2023.10
A new protocol has been developed to synthesize N1-vinyl benzotriazoles from 1-arylmethylbenzotriazoles by treatment with arylaldehydes and LiN(SiMe3)2. The reaction proceeded smoothly in the absence of transition metals, showing excellent Z selectivity and broad substrate scope with good functional group tolerance.
The heterocyclic ionic liquid-catalyzed direct oxidative amination of benzylic sp3 C–H bonds via intermolecular sp3 C–N bond formation for the synthesis of N-alkylated azoles under metal-free conditions is reported for the first time. The catalyst 1-butylpyridinium iodide can be recycled and reused with similar efficacies for at least eight cycles.