Cyclisierungen unter beteiligung von fluoridionen, 3. Mittell. [1,2] teilfluorierte 1.3- und 1.4-dioxane
作者:Guenter Siegemund、Warner Schwertfeger
DOI:10.1016/s0022-1139(00)81237-3
日期:1982.10
Cyclization of 2-(2-chloroethoxy)-perfluorocarboxylic acid halides 3 with alkalimetalfluoride gives 2.3-perfluoro- 1.4-dioxanes 6 with yields up to 84 %. This reaction is also used for the preparation of 4.5.6-perfluoro-1.3- dioxanes 12 starting from 3-chloromethoxyperfluorocarbonyl compounds 11. — The preparation of starting materials is described.
Synthesis of vinyl ether compounds by pyrolysis of dimethyl perfluoro-2,7-dimethyl-3,6-dioxa-1,8-octanedioate
作者:Kuniaki Takata、Masahiro Takesue、Yuji Iseki、Toshikatu Sata
DOI:10.1016/0022-1139(95)03316-1
日期:1995.12
Increase in the pyrolysis temperature and decomposition time result in an increasing conversion of 1. At lower temperatures the pyrolysisproduct is mainly 3. However, the formation of 2 increases with increasing decomposition temperature. Dimethyl carbonate was found in the decomposition product of the pyrolysis of 1 over Na2CO3, K2CO3.
在Na 2 CO 3,K 2 CO 3,CaCO 3,BaCO 3和ZnO上热解二甲基全氟2,7-二甲基-3,6-二氧杂-1,8-辛二酸酯(1),得到含全氟-3的混合物1,6-二氧杂-1,7-辛二烯(2)和全氟-2-甲基-3,6-二氧杂辛酸酯-7-烯(3)。为了获得这些乙烯基醚所必需的热解条件,对于二价金属化合物而言,其温度要比对一价金属化合物更高。热解温度和分解时间的增加导致转化率增加1。在较低温度下,热解产物主要为3。但是,2的形成随着分解温度的升高而增加。在Na 2 CO 3,K 2 CO 3上1的热解分解产物中发现碳酸二甲酯。
Process for producing difluoroiodoacetyl fluoride
申请人:Asahi Glass Company, Ltd.
公开号:US04318867A1
公开(公告)日:1982-03-09
A process for producing difluoroiodoacetyl fluoride comprises a step of producing an intermediate having a group of ICF.sub.2 CF.sub.2 OSO.sub.2 -- by reacting 1,2-diiodotetrafluoroethane with an oxidizing acid having S(VI) atom and a step of decomposing said intermediate into said product.
The reactions of oxalyl fluoride with electrophiles in the presence of alkalimetalfluoride were carried out. In the reaction with CF3CH2OTf (Tf=CF3SO2) or CH3CH2OTf, the synthesis of di-ether (ROCF2CF2OR) and mono-ether (ROCF2COF) was achieved. The difference of the reactivities between these two compounds was discussed from the result of DFT calculations.
Transition metal complexes incorporating the BF2 ligand formed by oxidative addition of the B–B bond in B2F4
作者:Norman Lu、Nicholas C. Norman、A. Guy Orpen、Michael J. Quayle、Peter L. Timms、George R. Whittell
DOI:10.1039/b006535h
日期:——
The reactions between B2F4 and the platinum and iridium complexes [Pt(PPh3)2(η-C2H4)], [Pt(dppb)(η-C2H4)] [dppb = 1,4-bis(diphenylphosphino)butane] and trans-[IrCl(CO)(PPh3)2] afforded the difluoroboryl complexes cis-[Pt(BF2)2(PPh3)2], cis-[Pt(BF2)2(dppb)] and fac-[Ir(BF2)3(CO)(PPh3)2] respectively all of which have been characterised by X-ray crystallography. The isoelectronic platinum dppb nitrito complex cis-[Pt(NO2)2(dppb)] has also been prepared and structurally characterised.