在温和条件下,利用容易获得的材料开发了无金属快速制备吡咯-2,3-二酮的方法,用于合成吡咯并[2,3- d ]哒嗪-7-酮和吡咯并[2,3- d] ]吡啶类。整个两锅法通过(i)第一锅,琥珀醛与C-酰亚胺原位进行无金属直接曼尼希反应氧化芳构化生成吡咯-2,3-二酮,和(ii)第二锅,进一步与各种肼缩合,以中等至良好的产率合成几种吡咯并吡啶酮和吡咯并吡嗪。
Polarity-Reversed Addition of Enol Ethers to Imines under Visible Light: Redox-Neutral Access to Azide-Containing Amino Acids
作者:Sen Yang、Shuangyu Zhu、Dengfu Lu、Yuefa Gong
DOI:10.1021/acs.orglett.9b03238
日期:2019.10.18
established for the construction of γ-azido aminoacids under visiblelight. This transformation features mild and redox-neutral conditions, affording a series of amino esters with excellent chemoselectivity. Preliminary mechanistic studies revealed that the addition of an oxyalkyl radical to imine is likely the rate-determining step. The obtained azido-containing amino esters could be successfully converted
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.
Radical cation salt induced Povarov reaction between iminoethyl glyoxylate and N-vinylamides: synthesis of quinoline-2-carboxylate derivatives
作者:Xiaodong Jia、Chang Qing、Congde Huo、Fangfang Peng、Xicun Wang
DOI:10.1016/j.tetlet.2012.10.097
日期:2012.12
A domino process between iminoethyl glyoxylate and N-vinylamides was achieved under the catalytic radical cation salt induced conditions, producing a series of quinoline-2-carboxylates. N-Vinylamides were involved as an acetylene equivalent. A possible mechanism was proposed to rationalize the formation of the products. (C) 2012 Elsevier Ltd. All rights reserved.
A Convenient Synthesis of Imidazolidin-4-ones<i>via</i>Domino Reactions
作者:Xueming Chen、Hui Wei、Yunyun Chen、Xingshu Li
DOI:10.1002/hlca.200900010
日期:2009.8
AbstractA series of imidazolidin‐4‐one derivatives was synthesized via a domino reaction of aldiminoesters and dialkylzinc. Chiral ligands were also examined in this reaction to obtain optically active products.