Copper(I)‐Catalyzed Regioselective Chan‐Lam
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2‐Vinylation of 1,2,3‐Triazoles and Tetrazoles
作者:Vladimir Motornov、Gennadij V. Latyshev、Yury N. Kotovshchikov、Nikolay V. Lukashev、Irina P. Beletskaya
DOI:10.1002/adsc.201900225
日期:2019.7.11
NH‐azoles with vinylboronic acids or vinyltrifluoroborate salt provides a direct route to N2‐vinyl‐1,2,3‐triazoles and N2‐vinyltetrazoles. The coupling reaction is efficiently catalyzed by (phen)Cu(PPh3)Br with low catalyst loading (5 mol%) under base‐free conditions. The method is applicable for vinylation of unsubstituted, monosubstituted, and disubstituted 1,2,3‐triazoles with various functionalities
铜催化的π不足的NH-唑类与乙烯基硼酸或乙烯基三氟硼酸盐的偶联提供了直接通往N2-乙烯基1,2,3-三唑和N2-乙烯基四唑的途径。(phen)Cu(PPh 3)Br在无碱条件下以低催化剂负载量(5 mol%)有效地催化了偶联反应。该方法适用于具有高N2选择性的各种功能的未取代,单取代和二取代的1,2,3-三唑的乙烯基化。