Synthesis of 2,4-unsubstituted quinoline-3-carboxylic acid ethyl esters from arylmethyl azides via a domino process
作者:Jumreang Tummatorn、Charnsak Thongsornkleeb、Somsak Ruchirawat、Tanita Gettongsong
DOI:10.1039/c3ob27493d
日期:——
4-unsubstituted quinoline-3-carboxylic acid ethyl esters via a domino process is described. The synthesis employs arylmethyl azides as the precursor which undergoes an acid-promoted rearrangement to give an N-aryl iminium ion. Following the addition with ethyl 3-ethoxyacrylate, intramolecular electrophilic aromatic substitution, elimination and subsequent oxidation, the quinoline products were obtained
描述了通过多米诺法方便地合成2,4-未取代的喹啉-3-羧酸乙酯。该合成使用芳基甲基叠氮化物作为前体,该前体经历酸促进的重排以产生N-芳基亚胺鎓离子。继加3-乙氧基丙烯酸乙酯,分子内亲电芳族取代,消除和随后的氧化,喹啉产物以中等至优异的产率获得。