作者:W. Stadlbauer、A. Pfaffenschlager、Th. Kappe
DOI:10.1055/s-1989-27395
日期:——
The cyclization of 4-azido-3-phenylpyridazines and 7-azido-6-phenyl-tetrazolo [1,5-b]pyridazine by heating with strong acids like methanesulfonic acid affords 5H-pyridazino[4,3-b] indoles or 10H-tetrazolo[1′,5′:1,6]pyridazino[4,3-b] indoles, respectively, whereas the conventional photochemical or thermolytic methods fail.
4-叠氮基-3-苯基吡嗪和7-叠氮基-6-苯基四唑[1,5-b]吡嗪在强酸如甲基磺酸的加热下发生环化反应,分别生成5H-吡嗪并[4,3-b]吲哚或10H-四唑[1′,5′:1,6]吡嗪并[4,3-b]吲哚,而传统的光化学或热解方法则失败。