Reaction of Diazo Compounds with Difluorocarbene: An Efficient Approach towards 1,1-Difluoroolefins
作者:Zhikun Zhang、Weizhi Yu、Chenggui Wu、Chengpeng Wang、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201509711
日期:2016.1.4
e difluoromethylenation of diazocompounds that proceeds under mild conditions has been developed and is based on the use of TMSCF2Br as the difluoromethylene source and tetrabutylammonium bromide (TBAB) as the promoter. The chemoselective formal carbene dimerization reaction is achieved owing to the electronic properties and the relative stability of the difluorocarbene intermediate.
An I(I)/I(III) Catalysis Route to the Heptafluoroisopropyl Group: A Privileged Module in Contemporary Agrochemistry
作者:Ryan Gilmour、Víctor Martín-Heras、Constantin G. Daniliuc
DOI:10.1055/a-1485-4916
日期:2021.11
prominently in the current portfolio of leading insecticides. To reconcile the expansive potential of this module with the synthetic challenges associated with preparing crowded, fluorinated motifs, I(I)/I(III) catalysis has been leveraged. Predicated on in situ generation of p-TolIF2, this route enables the direct difluorination of α-trifluoromethyl-β-difluorostyrenes in a single operation. This formal addition
Reaction of crystalline fluoro olefins with bromine vapor
作者:Douglas G. Naae
DOI:10.1021/jo00430a023
日期:1977.5
Palladium-catalysed difluoroolefination of benzyl tosylates toward the synthesis of <i>gem</i>-difluoro-2-trifluromethyl styrene derivatives
作者:Jie Xu、Jiangjun Liu、Gang Chen、Baojian Xiong、Xuemei Zhang、Zhong Lian
DOI:10.1039/d2ra02473j
日期:——
We have presented an efficient method to access gem-difluoro-2-trifluromethyl styrene derivatives via palladium catalysis. This method features mild reaction conditions, broad substrate scope and good product yields. Moreover, gram–scale reactions demonstrated the robustness and potential of this method. Control experiments revealed that the –CF3 group was essential to the success of this transformation