The copper-catalyzed ketenimine formation reaction of 1-(o-acetamidophenyl)propargyl alcohols with various sulfonyl azides is found to undergo a concomitant intramolecular nucleophile attack to generate 1,2-dihydro-2-iminoquinolines after aromatization (via elimination of acetyl and hydroxy groups) and tautomerization. The reaction produces 4-substituted and 3,4-unsubstituted title compounds in moderate to good yields under mild reaction conditions.
铜催化的1-(o-乙酰氨基苯基)丙炔醇与各种磺酰叠氮化合物的生成反应被发现会经历共同的分子内亲核攻击,生成1,2-二氢-2-亚胺喹啉,经芳香化(通过乙酰和羟基的消除)和互变异构。在温和的反应条件下,该反应以中等至良好的产率产生4-取代和3,4-未取代的产物。