Cyanoacetylene and Its Derivatives: XXXIV. Nucleophilic Addition of Tetrazole to Cyanoacetylenes
作者:V.V. Nosyreva、A.G. Mal'kina、O.A. Shemyakina、E.I. Kositsyna、A.I. Albanov、B.A. Trofimov
DOI:10.1007/s11178-005-0317-5
日期:2005.8
Nucleophilic addition of tetrazole to 4-hydroxy-4-alkyl-2-alkynonitriles and to 3-phenyl-2-propynonitrile occurred regiospecifically and afforded E-, Z-4-hydroxy-4-methyl-3-tetrazolyl-2-alkenonitriles and 3-tetrazolyl-3-phenyl-2-propenonitrile [20–40°C, 13–50 h, 4–15 wt% MOH (M = Na, K), THF (or DMSO)] in up to 69% yield. The attempt to perform cyclization of the hydroxy-containing adducts into iminodihydrofurans (KOH, ethanol, 23-25°C) resulted in vinyl nucleophilic substitution of the tetrazole moiety by an ethoxy group.
四唑对4-羟基-4-烷基-2-炔腈和3-苯基-2-丙炔腈的亲核加成反应具有区域选择性,生成E-, Z-4-羟基-4-甲基-3-四唑基-2-烯腈和3-四唑基-3-苯基-2-丙烯腈(20–40°C, 13–50小时,4–15 wt% MOH (M = Na, K),THF (或DMSO)),收率高达69%。尝试对含羟基的加合物进行环化反应生成亚胺二氢呋喃(KOH,乙醇,23-25°C),结果是四唑部分通过乙烯基亲核取代反应被乙氧基取代。