本文介绍了脱羰基 Pd 催化的芳基-氟烷基成键反应的发展,该反应将氟烷基羧酸衍生的亲电子试剂 [ RF C (O)X] 与芳基有机金属化合物 (Ar-M') 偶联。通过询问催化循环的各个步骤(氧化加成、羰基脱插入、金属转移和还原消除)来优化该反应,以确定一对相容的偶联伙伴和合适的 Pd 催化剂。这些化学计量有机金属研究揭示了反应设计的几个关键要素。首先,使用 M' = 硼酸酯可以避免R F C(O)X 和 Ar–M'之间未催化的背景反应。二、羰基脱嵌和Ar-R F当 R F = CF 3时,还原消除是催化循环中最慢的两个步骤。更改为 R F = CHF 2后,这两个步骤都会显着加快。计算研究表明,有利的 F 2 C–H---X 相互作用有助于加速该系统中的羰基脱嵌。最后,X = 二氟乙酸盐的金属转移速度较慢,但 X = F 的金属转移速度较快。最终,这些研究促成了 (SPhos)Pd
[EN] HALOGEN SUBSTITUTED DIKETONES, PYRAZOLE COMPOUNDS AND PROCESSES FOR THE MANUFACTURE OF PYRAZOLE COMPOUNDS<br/>[FR] DICÉTONES SUBSTITUÉES PAR UN HALOGÈNE, COMPOSÉS DE PYRAZOLE ET LEURS PROCÉDÉS DE PRODUCTION
申请人:SOLVAY
公开号:WO2017129759A1
公开(公告)日:2017-08-03
The present invention concerns new halogen substituted diketone compounds, new pyrazole compounds, processes for the manufacture of pyrazole compounds and processes for the manufacture of agrochemical or pharmaceutical compounds.
Synthesis of functionalized polyfluoroalkyl hypochlorites and fluoroxy compounds and their reactions with some fluoroalkenes
作者:Bruce B. Randolph、Darryl D. DesMarteau
DOI:10.1016/s0022-1139(00)80070-6
日期:1993.9
Several new polyfluoroalkyl hypochlorites and fluoroxy compounds containing Cl, H andBr in the alkyl group have been prepared and characterized by 19F NMR, 1H NMR andIR spectroscopies and by their reactions with fluoroalkenes to produce new polyfluoroethers.The novel compounds are prepared by the CsF-catalyzed addition of F2 or ClF to theCO bond in CF3C(O)CF2Cl, ClCF2C(O)CF2Cl, and their derivatives
A production method of difluoroacetyl chloride according to the present invention includes a chlorination step of bringing a raw material containing at least either a 1-alkoxy-1,1,2,2-tetrafluoroethane or difluoroacetyl chloride into contact with calcium chloride at a reaction enabling temperature. A production method of 2,2-difluoroethyl alcohol according to the present invention includes a catalytic reduction step of causing catalytic reduction of the difluoroacetyl chloride obtained by the above production method. By these methods, the difluoroacetyl fluoride can be efficiently converted to the difluoroacetyl chloride and to the 2,2-difluoroethyl alcohol.