开发了一种新的、简单有效的合成1-oxa-4-aza-spirooxazolines的方法。该反应在室温下使用玫瑰红作为有机光氧化还原催化剂和蓝色 LED 作为光源进行。据观察,醌与叠氮乙烯在 CO 双键而不是 CC 双键上发生螺环化反应,通过该反应,各种相应的各种相应的 1-oxa-4-aza-spirooxazolines 以良好至优异的产率合成。
Brandis, Chemische Berichte, 1889, vol. 22, p. 2150
作者:Brandis
DOI:——
日期:——
Visible-Light-Induced Regioselective C(sp<sup>3</sup>)-H Acyloxylation of Aryl-2<i>H-</i>azirines with (Diacetoxy)iodobenzene
作者:Aramita De、Sougata Santra、Alakananda Hajra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1021/acs.joc.9b01625
日期:2019.9.20
A visible-light-promoted regioselective coupling of C(sp(3))-H of aryl-2H-azirine and (diacetoxy)-iodobenzene has been reported. Rose Bengal as an organo-photoredox catalyst has been used in this reaction. The reaction proceeds under aerobic condition at room temperature. A variety of aryl-2H-azirines gives the corresponding acyloxylated azirines under this reaction conditions. The reaction goes through a radical pathway. The protocol is also applicable on gram-scale synthesis.
Visible-Light Photoredox Catalyzed Three-Component Cyclization of 2<i>H</i>-Azirines, Alkynyl Bromides, and Molecular Oxygen to Oxazole Skeleton
作者:Lili Chen、Hongji Li、Pinhua Li、Lei Wang
DOI:10.1021/acs.orglett.6b01696
日期:2016.8.5
A novel three-component cyclization of 2H-azirines, alkynyl bromides, and molecular oxygen under visible light photoredox catalysis at room temperature has been developed, which provides a direct approach to a wide range of substituted oxazoles in moderate to good yields.
Synthesis of thiazolidinimines/thiazinan-2-imines via three-component coupling of amines, <i>vic</i>-dihalides and isothiocyanates under metal-free conditions