Photochemical Nitrogen Extrusion of 5-Amino-1-vinyl-4,5-dihydro-1<i>H</i>-1,2,3-triazoles. Formation of Unusual Pyrroles
作者:Masato M. Ito、Yujiro Nomura、Yoshito Takeuchi、Shuji Tomoda
DOI:10.1246/bcsj.56.533
日期:1983.2
Photolysis of 4-alkyl-5-ammo-1-vinyl-4,5-dihydro-1H-1,2,3-triazoles gave not 3-alkylpyrroles, but unexpected 2-alkylpyrroles in 80–83% yields. 1-Vinylaziridines were assumed as a possible intermediate of this unusual pyrrole formation. In the photolysis of 7a-morpholino-1-styryl-3a,4,5,6,7,7a-hexahydro-1H-1,2,3-benzotriazole, however, nitrogen extrusion did not occur, but trans-cis isomerization took
4-烷基-5-氨-1-乙烯基-4,5-二氢-1H-1,2,3-三唑的光解得到的不是 3-烷基吡咯,而是出乎意料的 2-烷基吡咯,产率为 80-83%。1-乙烯基氮丙啶被认为是这种不寻常的吡咯形成的可能中间体。7a-morpholino-1-styyl-3a,4,5,6,7,7a-六氢-1H-1,2,3-苯并三唑在光解过程中没有发生氮挤出,反式异构化发生地方。