A Phosphetane Catalyzes Deoxygenative Condensation of α-Keto Esters and Carboxylic Acids via P<sup>III</sup>/P<sup>V</sup>═O Redox Cycling
作者:Wei Zhao、Patrick K. Yan、Alexander T. Radosevich
DOI:10.1021/ja511889y
日期:2015.1.21
A small-ring phosphacycle is found to catalyze the deoxygenative condensation of α-keto esters and carboxylic acids. The reaction provides a chemoselective catalytic synthesis of α-acyloxy ester products with good functional group compatibility. Based on both stoichiometric and catalytic mechanistic experiments, the reaction is proposed to proceed via catalytic P(III)/P(V)═O cycling. The importance
N-Heterocyclic carbene catalyzed regioselective oxo-acyloxylation of alkenes with aromatic aldehydes: a high yield synthesis of α-acyloxy ketones and esters
作者:Rambabu N. Reddi、Pushpa V. Malekar、Arumugam Sudalai
DOI:10.1039/c3ob41551a
日期:——
An N-heterocyclic carbene (NHC)-catalyzed reaction of alkenes with aromaticaldehydes providing for a high yield synthesis of α-acyloxy ketones and esters has been described. This unprecedented regioselective oxidative process employs NBS and Et3N in stoichiometric amounts and O2 (1 atm) as an oxidant under ambient conditions in DMSO as a solvent.
[EN] ONE STEP PROCESS FOR REGIOSELECTIVE SYNTHESIS OF α-ACYLOXY CARBONYLS<br/>[FR] PROCÉDÉ EN UNE ÉTAPE POUR LA SYNTHÈSE RÉGIOSÉLECTIVE D'&Agr;-ACYLOXY CARBONYLES
申请人:COUNCIL SCIENT IND RES
公开号:WO2014195972A1
公开(公告)日:2014-12-11
A regioselective N-Heterocyclic Carbene (NHC) catalyzed one step process for high yield synthesis of α-acyloxy carbonyl compounds is disclosed.
揭示了一种选择性区域N-杂环卡宾(NHC)催化的一步法,用于高产率合成α-酰氧羰基化合物。
Straightforward access to α-carbonyloxy esters and β-keto thioethers from aryldiazoacetates
A metal- and additive-free approach has been described for synthesizing α-carbonyloxy esters and β-keto thioethers from readily available aryldiazoacetates with carboxylic acids and thiol derivatives, respectively. α-Carbonyloxy esters and β-keto thioether derivatives were synthesized in good to high yields from aryldiazoacetates, carboxylic acids, and thiol derivatives decorated with various functional