Efficient and Rapid Regioselective One-Pot Synthesis of 1,4-Disubstituted 1,2,3-Triazoles from In Situ Generated Potassium Arylethynyltrifluoroborates through Sonogashira Reaction
作者:Jung Ho Song、Pilju Choi、Seung Eon Lee、Kyu Hyuk Jeong、Taejung Kim、Ki Sung Kang、Yong Soo Choi、Jungyeob Ham
DOI:10.1002/ejoc.201301003
日期:2013.10
Potassium arylethynyltrifluoroborates, the intermediates generated by the Sonogashira reaction of potassium ethynyltrifluoroborate with various aryl halides, were directly coupled with azides in the presence of a stoichiometric amount of CuI under aqueous conditions, and the desired 1,4-disubstituted 1,2,3-triazoles were isolated in good yields. Both electron-donating and electron-withdrawing substituents
芳基乙炔基三氟硼酸钾是由乙炔基三氟硼酸钾与各种芳基卤化物的 Sonogashira 反应生成的中间体,在含水条件下在化学计量的 CuI 存在下与叠氮化物直接偶联,并获得所需的 1,4-二取代的 1,2,3-以良好的收率分离出三唑。芳基乙炔基三氟硼酸钾上的给电子和吸电子取代基均得到中等至极好的分离产物产率。