作者:Veronika Fülöpová、Lauren Cziesla、Megan Fleming、Yiwei Lu、Adrienne Voelker、Viktor Krchňák
DOI:10.1021/acscombsci.5b00060
日期:2015.8.10
A traceless polymer-supported synthesis of 4-benzoylquinazolines was developed using the following commercially available building blocks: Fmoc-α-amino acids, 2-nitrobenzensulfonyl chlorides and α-bromoacetophenones. The acyclic intermediates underwent base-catalyzed rearrangement involving C–C and N–N bond formation followed by ring expansion and yielded resin-bound dihydroquinazoline-2-carboxylic
使用以下可商购的构件开发了无痕聚合物支持的4-苯甲酰基喹唑啉合成方法:Fmoc-α-氨基酸,2-硝基苯磺酰氯和α-溴乙酰苯。无环中间体经历了碱催化的重排,涉及C–C和N–N键的形成,随后发生环扩展并产生了与树脂结合的二氢喹唑啉-2-羧酸。通过三氟乙酸处理将它们从树脂中释放后,碱介导的脱羧反应以中等至高收率和纯度产生了目标喹唑啉。