Rapid and Efficient Trifluoromethylation of Aromatic and Heteroaromatic Compounds Using Potassium Trifluoroacetate Enabled by a Flow System
作者:Mao Chen、Stephen L. Buchwald
DOI:10.1002/anie.201306094
日期:2013.10.25
Going to the source: The trifluoromethylation of aryl/heteroaryl iodides has been demonstrated using a flowsystem, thus enabling a rapid rate of reaction. A broad spectrum of trifluoromethylated compounds was prepared in good to excellent yields using CF3CO2K as the trifluoromethyl source. The process has the advantage of short reaction times and uses convenient [CF3] sources.
追根溯源:芳基/杂芳基碘化物的三氟甲基化已被证明使用流动系统,从而实现快速反应。使用 CF 3 CO 2 K 作为三氟甲基源,以良好到极好的收率制备了广谱的三氟甲基化化合物。该方法具有反应时间短的优点并使用方便的[CF 3 ]源。
Rational Design and Development of<scp>Low‐Price</scp>, Scalable,<scp>Shelf‐Stable</scp>and Broadly Applicable Electrophilic Sulfonium<scp>Ylide‐Based</scp>Trifluoromethylating Reagents
reagents (trifluoromethyl)(4-nitrophenyl)bis(carbomethoxy)methylide (1g) and (trifluoromethyl)(3-chlorophenyl)bis(carbomethoxy)methylide (1j) through structure-activity study was described. Under mild conditions, reagent 1g reacted with β-ketoesters and silyl enol ethers to give α-trifluoromethylated-β-ketoesters or α-trifluoromethylated ketones in high yields. In addition, reagent 1g could serve as
[EN] HALOALUMINOXANE COMPOSITIONS, THEIR PREPARATION, AND THEIR USE IN CATALYSIS<br/>[FR] COMPOSITIONS D'HALOALUMINOXANE, PREPARATION ET UTILISATION DE CELLES-CI DANS DES CATALYSES
申请人:ALBEMARLE CORP
公开号:WO2005066191A1
公开(公告)日:2005-07-21
Novel haloaluminoxane compositions have been formed. The halogen is fluorine, chlorine, and/or bromine, and the amount of halogen atoms present in said composition is in the range of about 0.5 mole % to about 15 mole % relative to aluminum atoms.
Haloaluminoxane compositions, their preparation, and their use in catalysis
申请人:Sangokoya A. Samuel
公开号:US20050143254A1
公开(公告)日:2005-06-30
Novel haloaluminoxane compositions have been formed. The halogen is fluorine, chlorine, and/or bromine, and the amount of halogen atoms present in said composition is in the range of about 0.5 mole % to about 15 mole % relative to aluminum atoms.