N-Butyllithium-Mediated Reactions of 1-(2-Azidoarylmethyl)-1H-benzotriazoles with Alkyl Halides

摘要

Treatment of 1-(2-azidoarylmethyl)-1H-benzotriazoles (6) with n-BuLi (2.5 equiv.) in THF at -78 degrees C, followed by an addition of alkyl halides such as allyl, benzyl, and ethyl bromides with stirring for 2 h at room temperature afforded 2-(dialkylamino)-3-(benzotriazol-1-yl)-2H-indazoles (8), 3-(benzotriazol-1-yl)-2H-indazoles (9), 2-[(benzotriazol-1-yl)methyl]arylamine (10), and 2-[(benzotriazol-1-yl)(alkyl) methyl]arylamine (11).