[EN] PYRIMIDINE AND TRIAZINE DERIVATIVES AND THEIR USE AS AXL INHIBITORS [FR] DÉRIVÉS DE PYRIMIDINE ET DE TRIAZINE, ET LEUR UTILISATION COMME INHIBITEURS D'AXL
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.
Trimethylsilyl fluorosulfonyldifluoroacetate (TFDA): a new, highly efficient difluorocarbene reagent
作者:William R Dolbier、Feng Tian、Jian-Xin Duan、An-Rong Li、Samia Ait-Mohand、Olivia Bautista、Saiwan Buathong、J Marshall Baker、Jen Crawford、Pauline Anselme、Xiao Hong Cai、Aneta Modzelewska、Henryk Koroniak、Merle A Battiste、Qing-Yun Chen
DOI:10.1016/j.jfluchem.2003.12.002
日期:2004.3
TFDA is readily prepared from the reaction of fluorosulfonyldifluoroacetic acid with trimethylsilyl chloride, and it is a very effective and efficient source of difluorocarbene for use in addition reactions to alkenes of a broad scope of reactivities. Acid-sensitive substrates may require an additional purification step involving treatment of the distilled TFDA with sufficient Et3N to remove the acid
A Novel and Highly Efficient Synthesis of <i>gem</i>-Difluorocyclopropanes
作者:Feng Tian、Virginie Kruger、Olivia Bautista、Jian-Xin Duan、An-Rong Li、William R. Dolbier,、Qing-Yun Chen
DOI:10.1021/ol0055622
日期:2000.2.1
[GRAPHICS]A new and highly versatile source of difluorocarbene is reported. Trimethylsilyl fluorosulfonyldifluoroacetate (TFDA) undergoes decomposition in the presence of catalytic fluoride to form difluorocarbene under conditions that allow its addition to relatively electron deficient alkenes in high yield. For example, unprecedented CF2: addition to n-butyl acrylate proceeded in 73% yield.
[EN] PYRIMIDINE AND TRIAZINE DERIVATIVES AND THEIR USE AS AXL INHIBITORS<br/>[FR] DÉRIVÉS DE PYRIMIDINE ET DE TRIAZINE, ET LEUR UTILISATION COMME INHIBITEURS D'AXL
申请人:PFIZER
公开号:WO2016097918A1
公开(公告)日:2016-06-23
Compounds of the general formula(I): (I) processes for the preparation of these compounds, compositions containing these compounds, and the uses of these compounds.
公式(I)的化合物: (I) 这些化合物的制备方法,包含这些化合物的组合物,以及这些化合物的用途。
Methyl 2,2-Difluoro-2-(fluorosulfonyl)acetate, a Difluorocarbene Reagent with Reactivity Comparable to That of Trimethylsilyl 2,2-Difluoro-2-(fluorosulfonyl)acetate (TFDA)
作者:Steffen Eusterwiemann、Henry Martinez、William R. Dolbier
DOI:10.1021/jo300876z
日期:2012.6.15
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.