Novel Heterocyclic Analogs of Trityl Radicals: Synthesis and Dimerization of Diarylmethyl-1H-1,2,4-triazoles and Diarylmethyl-2H-phenanthro[9,10-d]-1,2,3-triazoles
菲并[9,10- d ]三唑的钾盐与苄基氯的反应以15%的产率得到2-(苄基)-2 H-菲并[9,10- d ]三唑(2a)。获得另一种区域异构体1-(苄基)-1H-菲并[9,10- d ]-三唑(1a),其副产物的收率为3.9%。与在芳环上具有甲基,氯或硝基的苄基氯类似的反应得到相应的两种产物1b-j和2b-j。在所有情况下,2b-j是产量为14-62%的主要产品,1b-j属于次要品种,产量在1.4-7.6%之间。通过X射线晶体分析证实了异构体的结构。
Selective Synthesis of<i>N</i>-H and<i>N</i>-Aryl Benzotriazoles by the [3 + 2] Annulation of Sodium Azide with Arynes
作者:Avishek Guin、Rahul N. Gaykar、Subrata Bhattacharjee、Akkattu T. Biju
DOI:10.1021/acs.joc.9b02198
日期:2019.10.4
arynes generated from2-(trimethylsilyl)aryltriflates resulting in the transition-metal-free synthesis of N-H and N-aryl benzotriazoles has been demonstrated. Using CsF as the fluoride source in CH3CN, the N-H benzotriazoles are formed in high selectivity instead of the expected azidobenzene. Interestingly, N-aryl benzotriazoles are formed using KF and THF as solvent in an open-flask reaction. Moreover,