TRIFLUOROMETHYLATION OF OLEFINS IN A FLOW CELL

被引：3

作者：

CHENG, PC

NONAKA, T

UNEYAMA, K

机构：

[1] OKAYAMA UNIV,FAC ENGN,DEPT APPL CHEM,OKAYAMA 700,JAPAN

[2] TOKYO INST TECHNOL,DEPT ELECTR CHEM,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN

来源：

DENKI KAGAKU | 1991年 / 59卷 / 05期

关键词：

ANODIC TRIFLUOROMETHYLATION; FLOW CELL; MASS TRANSFER;

D O I：

10.5796/kogyobutsurikagaku.59.427

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Influence of concentration, flow rate and current density on the anodic trifluoromethylation of olefins in trifluoroacetic acid were examined in a flow cell. Increases in the concentration of olefins resulted in significant increases in current efficiencies for the corresponding trifluoromethylated products, while the flow rate of electrolytic solutions did not affect the efficiencies. Maxima of the efficiencies were observed at certain current densities. The reaction seemed to proceed via addition of .CF3 anodically-generated from trifluoroacetic acid to the olefins in the bulk solutions. Maximum yields and efficiencies for the desired products were not lower than those obtained in a batch cell under preliminarily optimized conditions.

引用

页码：427 / 430

页数：4

共 14 条

[1] REACTIONS OF OLEFINIC DOUBLE-BONDS WITH POLYFLUOROALKYL RADICALS GENERATED ELECTROCHEMICALLY [J].

BROOKES, CJ ;

COE, PL ;

OWEN, DM ;

PEDLER, AE ;

TATLOW, JC .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1974, (09) :323-324

[2] REACTIONS OF FLUOROALKYL RADICALS GENERATED ELECTROCHEMICALLY .1. ADDITIONS OF TRIFLUOROMETHYL RADICALS TO OLEFINIC AND ACETYLENIC BONDS [J].

BROOKES, CJ ;

COE, PL ;

PEDLER, AE ;

TATLOW, JC .

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 1978, (03) :202-209

[3] PRODUCT-SELECTIVITY CONTROL IN ELECTROORGANIC REACTIONS BY CONTROLLING MASS-TRANSFER RATE - CATHODIC REDUCTION OF CARBONYL-COMPOUNDS AND NITROBENZENE [J].

CHENG, PC ;

NONAKA, T .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1989, 269 (01) :223-230

[4]

CHILDS WV, 1979, AICHE S SER, P19

[5]

DANLY DE, 1979, CHEM IND, V7, P439

[6]

EBERSON L, 1983, ORGANIC ELECTROCHEMI, P435

[7]

JOHNSON DK, 1980, J CHEM TECHNOL BIOT, V30, P200

[8]

KAWAMURA T, 1973, KAGAKUSOSETSU, V1, P186

[9]

KOKUSENYA Y, 1987, DENKI KAGAKU, V55, P235

[10] ELECTROCHEMICAL OXIDATION OF TRIFLUOROACETIC-ACID ANION .4. SYNTHESIS AND STEREOCHEMISTRY OF PRODUCTS OF TRIFLUOROMETHYL RADICAL-ADDITION TO SOME MONOSUBSTITUTED AND DISUBSTITUTED OLEFINS [J].

RENAUD, RN ;

CHAMPAGNE, PJ ;

SAVARD, M .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1979, 57 (19) :2617-2620

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