Synthesis of α-Diazo Carbonyl Compounds with the Shelf-Stable Diazo Transfer Reagent Nonafluorobutanesulfonyl Azide
作者:Jose Luis Chiara、José Ramón Suárez
DOI:10.1002/adsc.201000846
日期:2011.3.7
Nonafluorobutanesulfonyl azide is a shelf‐stable, cost‐effective and general diazo transfer reagent for the efficient synthesis of α‐diazo carbonyl compounds in excellent yields and in very short reaction times, under mild conditions. The diazo products can be readily isolated in pure form after a simple aqueous extractive work‐up that avoids chromatographic purification in most cases. Because of its
Hantzsch Ester-Mediated Benzannulation of Diazo Compounds under Visible Light Irradiation
作者:Savita B. Nagode、Ruchir Kant、Namrata Rastogi
DOI:10.1021/acs.orglett.9b02135
日期:2019.8.16
A metal-free benzannulation of diazo compounds under visible light irradiation was developed. The photocatalytic single electron transfer by Hantzschester to the diazo enolates results into enolate vinyl radicals, which were trapped by alkynes leading to functionalized naphthalene-1-ols. The enolate vinyl radicals were also trapped intramolecularly by o-aryl groups to access phenanthren-10-ols. The
Solvent-Directed Transition Metal-Free C–C Bond Cleavage by Azido-1,3,5-triazines and Their Stability-Reactivity Paradox
作者:Fulei Ma、Xiaoyu Xie、Yuanheng Li、Ziqiang Yan、Mingming Ma
DOI:10.1021/acs.joc.0c02342
日期:2021.1.1
We report a solvent-directed and regioselective carbon–carbon bondcleavage of aryl ketones by azido-1,3,5-triazines (ATs), which is typically completed within 10 min in DMSO at room temperature, without using transition metal catalysts. The cleavage is driven by the steric hindrance in the adducts of aryl ketones and ATs, which is substantiated by DFT calculation. Our recent results showed that ATs
Synthesis of α-diazo-β-keto esters, phosphonates and sulfones via acylbenzotriazole-mediated acylation of a diazomethyl anion
作者:Mukund M. D. Pramanik、Namrata Rastogi
DOI:10.1039/c5ob01975c
日期:——
We report a method for the synthesis of α-diazo-β-keto esters, phosphonates and sulfonesvia acylation of corresponding diazomethyl anions with N-acylbenzotriazoles. The N-o-amino-acylbenzotriazoles exhibited an unprecedented transphosphorylation reaction leading to diazoacetyl phenylphosphoramidates.