Phosphine-catalyzed annulation of ethyl (arylimino)acetates: synthesis of highly functionalized oxoimidazolidines
作者:Guang-Ning Ma、Fei-Jun Wang、Jun Gao、Min Shi
DOI:10.1039/b811167g
日期:——
This paper describes an unexpected and novel nucleophilic phosphine-catalyzed annulation of ethyl (arylimino)acetates to give polysubstituted oxoimidazolidine derivatives in moderate to good yields from simple and easily available starting materials under mild conditions. In this reaction, the addition of methyl vinyl ketone (MVK) is essential to induce the formation of oxoimidazolidines.
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
Lewis-Acid-Catalyzed Selective Friedel–Crafts Reaction or Annulation between Anilines and Glyoxylates
作者:Wangyu Li、Dungai Wang、Xiao Liang、Zhixiong Jin、Shiwen Zhou、Guanru Chen、Yuanjiang Pan
DOI:10.1021/acs.orglett.2c01115
日期:2022.4.29
A Lewis-acid-catalyzed selective reaction between anilines and glyoxylates was developed for synthesis of diarylmethanes or oxoimidazolidines. Under the catalysis of AgOTf, a series of anilines-based diarylmethanes, including primary, secondary, and tertiary anilines, were obtained in moderate to good yields. Moreover, stereoselective oxoimidazolidines were performed with the catalysis of Cu(OAc)2·H2O