The first synthesis of dihydro-3H-pyrido[2,3-b][1,4]diazepinols and a new alternative approach for diazepinone analogues
作者:Helio G. Bonacorso、Rogerio V. Lourega、Everton D. Deon、Nilo Zanatta、Marcos A.P. Martins
DOI:10.1016/j.tetlet.2007.05.072
日期:2007.7
The first synthesis of a series of 2-aryl(heteroaryl)-4-trifluoromethyl-4,5-dihydro-3H-pyrido[2,3-b][1,4]diazepin-4-ols, where aryl = C6H5, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, 4-CH3C6H4, 4-OCH3C6H4, 4,4′-biphenyl, 1-naphthyl and heteroaryl = 2-thienyl, 2-furyl obtained from the direct cyclocondensation reaction of 4-methoxy-1,1,1-trifluoroalk-3-en-2-ones with 2,3-diaminopyridine in 54–71% yield, is reported
一系列2-芳基(杂芳基)-4-三氟甲基-4,5-二氢-3 H-吡啶并[2,3- b ] [1,4]二氮杂-4-醇的首次合成6 ħ 5,4-FC 6 H ^ 4,4-CLC 6 ħ 4,4- BRC 6 ħ 4,4-CH 3 C ^ 6 ħ 4,4-OCH 3 C ^ 6 ħ 4由4-甲氧基-1,1,1-三氟烷-3-烯-2-酮与2,2-甲氧基的直接环缩合反应获得的4,4'-联苯,1-萘基和杂芳基= 2-噻吩基,2-呋喃基据报道3-二氨基吡啶的产率为54-71%。从4-甲氧基反应合成一系列2-芳基(杂芳基)-3 H-吡啶并[2,3- b ] [1,4]二氮杂-4-4(5 H)-的另一种有效的替代方法还报道了带有2,3-二氨基吡啶的-1,1,1-三氯代烷基3-en-2-one,产率为54-70%。