1-Substituted 1,4,5,6-tetrahydropyridazines and 1-(N-substituted)-aminopyrrolidines from hydrazines and 2,5-dimethoxytetrahydrofuran
作者:Giancarlo Verardo、Nicoletta Toniutti、Angelo G. Giumanini
DOI:10.1016/s0040-4020(97)00142-7
日期:1997.3
N-Substituted 1,4,5,6-tetrahydropyridazines () can be prepared in a one pot procedure from a hydrazine and 2,5-dimethoxytetrahydrofuran () using NaBH4 in aqueous-THF acidic medium in fair yields. Variable amounts of two side products are also formed: hexahydropyridazines , likely produced by a route other than the direct reduction of , and 1-aminopyrrolidines . A direct reduction-N-reductive ethylation
N-取代的1,4,5,6-四氢哒嗪()可以在THF酸性介质中使用NaBH 4以肼和2,5-二甲氧基四氢呋喃()的一锅法制备,并以合理的产率得到。还形成了不同量的两种副产物:六氢哒嗪,可能是通过直接还原以外的途径生产的;以及1-氨基吡咯烷。用NaBH 4在AcOH中可以实现N的直接还原N还原乙基化。