Synthesis of Dihydrophenanthridines and Oxoimidazolidines from Anilines and Ethylglyoxylate via Aza Diels–Alder Reaction of Arynes and KF-Induced Annulation
作者:R. Santhosh Reddy、Chandraiah Lagishetti、Shuo Chen、I. N. Chaithanya Kiran、Yun He
DOI:10.1021/acs.orglett.6b02186
日期:2016.9.16
multicomponent coupling of arynes, anilines, and ethylglyoxylate, proceeding via an inverse electron-demand aza Diels–Alder cycloaddition and N-arylation, has been demonstrated. This protocol allows rapid access to N-aryl dihydrophenanthridine derivatives in moderate to high yields at room temperature from readily available starting materials. In addition, an unprecedented fluoride induced annulation of eth
已经证明,通过反电子需求的氮杂Diels-Alder环加成反应和N-芳基化反应,可以实现芳烃,苯胺和乙醛酸乙酯的无过渡金属多组分偶联。该方案允许在室温下从容易获得的起始原料以中等至高产率快速获得N-芳基二氢菲啶衍生物。此外,前所未有的氟化物诱导的(芳基)乙酸乙酯的环化反应在温和条件下以高收率导致形成高度官能化的氧代咪唑烷衍生物。