Self-Catalyzed Rapid Synthesis of <i>N</i>-Acylated/<i>N</i>-Formylated α-Aminoketones and <i>N</i>-Hydroxymethylated Formamides from 3-Aryl-2<i>H</i>-Azirines and 2-Me/Ph-3-Aryl-2<i>H</i>-Azirines
作者:Aramita De、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1021/acs.orglett.0c01206
日期:2020.5.15
by the reaction of 3-aryl-2H-azirines and highly substituted 2-Me/Ph-3-aryl-2H-azirines with various carboxylic acids under ambient air within 10 min at room temperature. N-Trifluoroacetylated α-aminoketones with different substituents have been reported in the presence of trifluoroacetic acid. This protocol is equally effective to synthesize N-formylated α-aminoketone and N-hydroxymethylated formamide
Photoredox-catalysed redox-neutral trifluoromethylation of vinyl azides for the synthesis of α-trifluoromethylated ketones
作者:Hai-Tao Qin、Shu-Wei Wu、Jia-Li Liu、Feng Liu
DOI:10.1039/c6cc10035j
日期:——
A redox-neutral, mild, and simple protocol is developed for the synthesis of [small alpha]-trifluoromethylated ketonesfromvinyl azides under transition-metal-free conditions. In the presence of organic photoredox catalyst N-methyl-9-mesityl acridinium and...
PIDA–I<sub>2</sub> mediated direct vicinal difunctionalization of olefins: iodoazidation, iodoetherification and iodoacyloxylation
作者:Tapas Kumar Achar、Saikat Maiti、Prasenjit Mal
DOI:10.1039/c6ob00532b
日期:——
of phenyliodine diacetate (PIDA) and iodine. I+ facilitated the direct vicinal difunctionalization of olefins to α-azido, α-trideuteriomethoxy, α-2,2,2-trifluoroethoxy and α-acyloxy alkyliodides via cation–π interaction at room temperature and under transition-metal free conditions.
Visible‐Light‐Mediated Synthesis of 1‐Oxa‐4‐aza‐spiro Oxazolines by Spiroannulation of Quinones with Vinyl Azides
作者:Subhankar Sarkar、Aramita De、Sougata Santra、Igor A. Khalymbadzha、Grigory V. Zyryanov、Adinath Majee
DOI:10.1002/ejoc.202200503
日期:2022.7.14
A new, simple and efficient method has been developed to synthesize 1-oxa-4-aza-spirooxazolines. The reaction was carried out at room temperature using rose bengal as an organic photoredox catalyst and blue LED as a light source. It was observed that quinones underwent spiroannulation reaction with vinyl azide on C-O double bond instead of C-C double bond through which various corresponding various
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。
Controlling the Reactivity of IBA‐N3 by Switching Halogen Salts: Providing a Universal Strategy for Haloazidation of Alkenes
monomer halogen, the need for in situ generation of unstable halogen azides (XN3), applicability to one type of haloazidation and inability to precisely control selectivity. Herein, we developed a universal strategy for haloazidation of alkenes through controlling the reactivity of IBA-N3 by switching halogen salts, allowing for the synthesis of a diversity of halogen azide products. Mechanistic studies