Benzyne-mediated rearrangement of 3-(2-pyridyl)-1,2,4-triazines into 10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles
作者:Igor L. Nikonov、Dmitry S. Kopchuk、Igor S. Kovalev、Grigory V. Zyryanov、Albert F. Khasanov、Pavel A. Slepukhin、Vladimir L. Rusinov、Oleg N. Chupakhin
DOI:10.1016/j.tetlet.2013.09.042
日期:2013.11
The reaction between 5-R-6-R1-3-(2-pyridyl)-1,2,4-triazines and benzyne generated in situ in toluene under reflux results in the formation of 10-(1H-1,2,3-triazol-1-yl)pyrido[1,2-a]indoles 3 in up to 60% yields instead of the expected 3-R-4-R1-1-(2-pyridyl)isoquinolines 2. The crystal structure of product 3c and the proposed mechanism for the formation of 3 are reported.
5-R-6-R 1 -3-(2-吡啶基)-1,2,4-三嗪与甲苯在回流条件下原位生成的苯炔反应生成10-(1 H -1,2 ,3-三唑-1-基)吡啶[1,2- a ]吲哚3的收率高达60%,而不是预期的3-R-4-R 1 -1-(2-吡啶基)异喹啉2。报告了产物3c的晶体结构和建议的形成3的机理。