在室温下,通过酸酐,异氰酸酯或酰氯将2-(2-氨基苯基)喹唑啉-4-胺选择性地酰化在苯基氨基上。在与乙氧基亚甲基衍生物和原酸酯的反应中获得相似的选择性。在温和的条件下,用乙酸酐和异氰酸酯还可以使喹唑啉-喹唑啉四环结构中的环外亚氨基取代基酰化。用浓盐酸(在60°C下1当量)和3 M NaOH(3当量,rt)进行水解以释放苯胺取代基,从而生成甲酰化的衍生物或裂解杂环胺中的酰基。
The reaction of anthranilonitrile and triethylorthoformate revisited: formation of dimeric and trimeric species
摘要:
The reaction of anthranilonitrile and triethylorthoformate was performed under different experimental conditions, leading to substituted quinazolines, triazachrysenes or quinazolinyl-aminophenyl quinazolines. A mechanistic proposal is presented to rationalize the formation of these compounds. The fluorescence properties of the highly conjugated triazachrysene structures were studied and the fluorescence quantum yield for compounds 5 and 13 was comparable to that of pyrene. (C) 2010 Elsevier Ltd. All rights reserved.