Cross‐Electrophile Coupling between Aryl/Vinyl Triflates and Vinyl Tosylates for the Synthesis of
<i>gem</i>
‐Difluoroalkenes via Ni/Pd Cooperative Catalysis
作者:Baojian Xiong、Yue Li、Jinyu Zhang、Jiangjun Liu、Xuemei Zhang、Zhong Lian
DOI:10.1002/adsc.202101388
日期:2022.3
A dual nickel-/palladium-catalyzed direct gem-difluorovinylation of readily available aryl/vinyltriflates with substituted gem-difluorovinyl tosylates is presented. This protocol affords various diaryldifluoroalkene, arylalkyldifluoroalkene and 1,1-difluoro-2-substituted-1,3-dienes under mild reaction conditions with excellent functional group compatibility, and provides a potential pathway to the
Magnesium Metal-Mediated Reductive Trifluoromethylation of Aldehydes with Phenyl Trifluoromethyl Sulfone
作者:Jinbo Hu、Yanchuan Zhao、Jieming Zhu、Chuanfa Ni
DOI:10.1055/s-0029-1218752
日期:2010.6
An unprecedented reductive nucleophilic trifluoromethylation of aldehydes by using phenyl trifluoromethyl sulfone is reported. Mercury(II) chloride efficientlyactivates magnesium metal to induce the desulfonylative trifluoromethylation process. The new reductive trifluoromethylation provides an alternative method for efficienttrifluoromethylation of non-enolizable or enolizable aldehydes with readily
THE CHROMIC ACID OXIDATION OF ARYL TRIFLUOROMETHYL ALCOHOLS: ISOTOPE AND SUBSTITUENT EFFECTS
作者:Ross Stewart、Donald G. Lee
DOI:10.1139/v64-061
日期:1964.2.1
reactions the anomalous isotope effects have been tentatively attributed to alterations in the C-H bending modes in the transition state. It was of interest, then, to determine if the unusual isotope effects observed in the permanganate oxidation also occur in the oxidation of these alcohols by chromic acid. A "normal" isotopeeffect of 6.6 at 25' was found for the chromic acidoxidation of isopropyl-d alcohol
A micro‐flow nucleophilic trifluoromethylation of carbonyl compounds using gaseous fluoroform was developed. This method also allows the first micro‐flow transformation of N‐sulfinylimines into trifluoromethyl amines with excellent diastereoselectivity. To demonstrate the synthetic utility of this micro‐flow synthesis, the formal micro‐flow synthesis of Efavirenz is described.