作者:Shunsaku OHTA、Ikuo KAWASAKI、Takahiro UEMURA、Masayuki YAMASHITA、Tomomichi YOSHIOKA、Satoshi YAMAGUCHI
DOI:10.1248/cpb.45.1140
日期:——
Trimethylsilylaion of 1, 2, 3-triazole regioselectively proceeded to give 2-trimethylsilyl-2H-1, 2, 3-triazole, which was treated with primary alkyl halides in the presence of tetrabutylammonium fluoride to give 1-alkyl-1H-1, 2, 3-triazoles as a sole product. 1-Methyl-5-substituted 1H-1, 2, 3-triazoles were prepared by alkylation of 5-lithio-1-methyl-1H-1, 2, 3-triazole, and 1-methyl-4-substituted 1H-1, 2, 3-triazoles were obtained by alkylaiton of 4-lithio-1-methyl-5-phenylthio-1H-1, 2, 3-triazole followed by reductive desulfurization.
三甲基硅基化的 1, 2, 3-三唑选择性地生成了 2-三甲基硅基-2H-1, 2, 3-三唑,该化合物在四丁基氟铵存在下与初级烷基卤化物反应,生成 1-烷基-1H-1, 2, 3-三唑作为唯一产物。通过烷基化 5-锂化-1-甲基-1H-1, 2, 3-三唑制备了 1-甲基-5-取代的 1H-1, 2, 3-三唑,1-甲基-4-取代的 1H-1, 2, 3-三唑则通过烷基化 4-锂化-1-甲基-5-苯硫基-1H-1, 2, 3-三唑后进行还原脱硫得到。