已经开发出用于氢氟碳化合物(HFC)的新溶解度参数SP(SP = 1.175 ln(np)+ 0.025 H -0.063 F -0.028α-0.018β,其中np取决于摩尔体积和摩尔折射率;H和F分别是分子中氢和氟的数目;而α和β分别是HCF和HCCF连接的数目。SP的价值HFC已被用来预测HFC在25°C下对于各种碳氢化合物是否是良好的溶剂。在异构HFC族中,对烃具有最大溶解能力的单个HFC是那些氟与氢的分离度最大的HFC。将希尔德布兰德溶解度参数δ与半经验SP值进行比较。
Syntheses of fluorous propenes from 3-perfluoroalkyl-2-iodo-1-propanols
摘要:
3-(Perfluoroalkyl)-1-propenes are obtained in excellent yields up to 100-g quantities by deiodination-dehydroxylation reactions of the easily accessible 2-iodo-3-(perfluoroalkyl)-propanols with red phosphorus and catalytic amounts of iodine or with an SnCl2/POCl3 reagent pair in pyridine (fluorous Cornforth reaction). Both methods afford fluorous propenes in high GC purity, the former one has high atom-economy and proceeds safely if the fluorous iodohydrin precursors are added in increments; for the solid ones using a 'hot-melt' dropping funnel. The title fluorous propenes are effectively isolated by co-distillation with pyridine. (c) 2008 Elsevier B.V. All rights reserved.
Base-Promoted C–C Bond Activation Enables Radical Allylation with Homoallylic Alcohols
作者:Maximilian Lübbesmeyer、Emily G. Mackay、Mark A. R. Raycroft、Jonas Elfert、Derek A. Pratt、Armido Studer
DOI:10.1021/jacs.9b12343
日期:2020.2.5
C-radical addition to the double bond of the title reagents and subsequent base-promoted homolytic Cα–Cβ cleavage leads to the formation of the corresponding allylated products along with ketyl radicals that act as single electron reductants to sustain the chain reactions. Substrate scope is documented and the role of base in the C–Cbond activation is studied by computation.
Synthèse de 3-perfluoroalkylprop-1-ènes RF-CH2-CH=CH2
作者:S. Rubio、H. Blancou、A. Commeyras
DOI:10.1016/s0022-1139(99)00137-2
日期:1999.11
The reactions of perfluoroalkyl iodides with allylbromide or chloride, in the presence of solid potassium hydroxide KOH give 3-perfluoroalkylprop-1-enes RFCH2CH=CH2 in good yields under mild conditions. This reaction represents a synthetically viable and convenientroute to such compounds.
在固体氢氧化钾KOH存在下,全氟烷基碘化物与烯丙基溴或氯化物的反应在温和条件下以良好的收率得到3-全氟烷基丙-1-烯R F CH 2 CH = CH 2。该反应代表了合成上可行且方便的途径。
HYDROSILYLATION PROCESS USING A GERMYLENE-BASED ORGANIC CATALYST
申请人:Elkem Silicones France SAS
公开号:US20190177343A1
公开(公告)日:2019-06-13
The invention relates to a method for hydrosilylating an unsaturated compound comprising at least one ketone function, one aldehyde function, one alkene function and/or one alkyne function, with a compound comprising at least one hydrogenosilyl function, using an organic germanium catalyst.
METHOD OF HYDROSILYLATION IMPLEMENTING AN ORGANIC CATALYST DERIVED FROM GERMYLENE
申请人:BLUESTAR SILICONES FRANCE SAS
公开号:US20170313729A1
公开(公告)日:2017-11-02
The present invention concerns a method for the hydrosilylation of an unsaturated compound comprising at least one ketone function, one aldehyde function, one alkene function and/or one alkyne function, with a compound comprising at least one hydrogen-silyl function implementing an organic catalyst of tri-coordinated germanium.
METHOD FOR PREPARING THIOCARBOXYLIC ACID S-(FLUOROALKYL) ESTER
申请人:Sumitomo Chemical Company Limited
公开号:EP2684870A1
公开(公告)日:2014-01-15
It is provided that a method for producing a thiocarboxylic acid S-(fluoroalkyl) ester represented by formula (III) [wherein R1 represents a methyl group, an ethyl group or a phenyl group, and R2 represents a C1-C5 fluoroalkyl group] by reacting a thiocarboxylic acid represented by formula (I) [wherein R1 has the same meaning as defined above] with a fluoroolefin represented by formula (II) [wherein R2 has the same meaning as defined above] in the presence of a radical generator.