The surprising nucleophilic addition of aminochlorocarbenes to diethyl acetylenedicarboxylate and to oxalyl chloride: quinolines and benzo[1,4]diazepines from N-alkylformanilides and oxalyl chloride in the presence of Hünig's base
作者:Ying Cheng、Hua Yang、Otto Meth-Cohn
DOI:10.1039/b307278a
日期:——
xylene, the derived nucleophilic arylaminochlorocarbenes bearing 4-methyl- and 4-methoxy-substituents react with acetylenedicarboxylates to give 2-(2-chloro-1,2-bis(ethoxycarbonyl)vinyl)-3,4-bis(ethoxycarbonyl)-1-methyl-1,2-dihydroquinolines while most derivatives react with oxalyl chloride to give substituted 1-methyl-4 phenylbenzo[f][1,4]diazepine-2,3-dicarboxylic anhydrides.
源自N-甲基甲酰苯胺的Vilsmeier试剂易于与Hünig碱进行去质子化。在二甲苯中,带有4-甲基和4-甲氧基取代基的衍生的亲核芳基氨基氯卡宾与炔二羧酸酯反应生成2-(2-氯-1,2-双(乙氧基羰基)乙烯基)-3,4-双(乙氧基羰基)- 1-甲基-1,2-二氢喹啉,而大多数衍生物与草酰氯反应生成取代的1-甲基-4苯基苯并[f] [1,4]二氮杂-2,3-二羧酸酐。