Methyl 2,2-Difluoro-2-(fluorosulfonyl)acetate, a Difluorocarbene Reagent with Reactivity Comparable to That of Trimethylsilyl 2,2-Difluoro-2-(fluorosulfonyl)acetate (TFDA)
摘要:
Under specific high concentration, high temperature conditions, methyl 2,2-difluoro-2-(fluorosulfonyl)acetate (MDFA) has been found to act as a very efficient source of difluorocarbene, exhibiting carbene reactivity characteristics comparable to those exhibited by trimethylsilyl 2,2-difluoro-2-(fluorosulfonyl)acetate (TFDA). For example, in reaction with highly unreactive n-butyl acrylate and using only 2 equiv of MDFA, a yield of 76% of difluorocyclopropane product was obtained after 2 days.
Difluorocarbene Addition to Alkenes and Alkynes in Continuous Flow
作者:Pauline Rullière、Patrick Cyr、André B. Charette
DOI:10.1021/acs.orglett.6b00573
日期:2016.5.6
The first in-flow difluorocarbene generation and addition to alkenes and alkynes is reported. The application of continuousflow technology allowed for the controlled generation of difluorocarbene from TMSCF3 and a catalytic quantity of NaI. The in situ generated electrophilic carbene reacts smoothly with a broad range of alkenes and alkynes, allowing the synthesis of the corresponding difluorocyclopropanes
Reaction of 1,1-difluorocyclopropanes with organolithium compounds
作者:Minoru Suda
DOI:10.1016/s0040-4039(00)77856-7
日期:1980.1
Substituted 1,1-difluorocyclopropanes react with organolithium reagents to provide either cyclopropenes or mono-substituted acetylenes depending upon the substitution patterns.
取代的1,1-二氟环丙烷与有机锂试剂反应生成环丙烯或单取代的乙炔,具体取决于取代方式。
Halomethyl metal compounds. LX. Phenyl(trifluoromethyl)mercury. Useful difluorocarbene transfer agent