Preparation of new 2-amino- and 2,3-diamino-pyridine trifluoroacetyl enamine derivatives and their application to the synthesis of trifluoromethyl-containing 3<i>H</i>-pyrido[2,3-<i>b</i>][1,4] diazepinols
作者:Helio G. Bonacorso、Rogério V. Lourega、Fernando J. Righi、Everton D. Deon、Nilo Zanatta、Marcos A. P. Martins
DOI:10.1002/jhet.5570450619
日期:2008.11
2-aryl(heteroaryl)-4-trifluoromethyl-3H-pyrido[2,3-b][1,4]diazepin-4-ols obtained from intramolecular cyclization reaction of the respective trifluoroacetyl enamines or from the direct cyclocondensation reaction of 4-methoxy-1,1,1-trifluoroalk-3-en-2-ones with 2,3-diaminopyridine, under mild conditions, is also reported.
一系列新型中间体N 2(N 3)-[1-烷基(芳基/杂芳基)-3-氧代-4,4,4-三氟烷-1-烯-1-基] -2-氨基吡啶的合成[F 3 CC(O)CH CR 1(2 NH C 5 H 3 N)]和2,3-二氨基吡啶[F 3 CC(O)CH CR 1(2-NH 2 -3-NH C 5 H 3 N )],其中R 1 = H中,Me,C 6 H ^ 5,4-FC 6 H ^ 4,4-CIC 6 ħ 4,4- BRC 6ħ 4,4-CH 3 C ^ 6 ħ 4,4-OCH 3 C ^ 6 ħ 4,4,4'-联苯基,1-萘基,2-噻吩基,2-呋喃基报道。从相应的三氟乙酰基烯胺的分子内环化反应或直接得到的2-芳基(杂芳基)-4-三氟甲基-3 H-吡啶并[2,3- b ] [1,4]二氮杂-4-醇的相应系列还报道了在温和条件下4-甲氧基-1,1,1-三氟烷-3-烯-2-酮与2,3-二氨基吡啶的环缩合反应。