Rate enhancement of organic reactions by microwaves at atmospheric pressure

被引：115

作者：

Gedye, RN ^{[1
]}

Wei, JB

机构：

[1] Laurentian Univ, Dept Chem & Biochem, Sudbury, ON P3E 2C6, Canada

[2] Lambda Technol Inc, Morrisville, NC 27560 USA

来源：

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE | 1998年 / 76卷 / 05期

关键词：

microwave; nonthermal effects; superheating; hot spots;

D O I：

10.1139/cjc-76-5-525

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Several different reactions have been studied to determine whether they occur more rapidly than conventionally heated reactions at atmospheric pressure. Small rate enhancements have been observed for some reactions carried out under microwave reflux in a modified domestic microwave oven. The Knoevenagel reaction of acetophenone with ethyl cyanoacetate was shown to have a rate enhancement of 2.5 times. However this reaction showed no rate increase over conventional heating, at the same temperature, in a variable-frequency microwave oven. It is therefore probable that the small rate enhancements observed in these experiments, using microwave heating, were due to hot spots or superheating of the solvent rather than to nonthermal effects.

引用

页码：525 / 532

页数：8

共 25 条

[1] MICROWAVE-ASSISTED CATALYTIC ADDITION OF HALOCOMPOUNDS TO ALKENES [J].

ADAMEK, F ;

HAJEK, M .

TETRAHEDRON LETTERS, 1992, 33 (15) :2039-2042

[2]

*AT EN CAN LTD VOS, 1990, 14 AT EN CAN LTD VOS, P21

[3] SUPERHEATING EFFECTS ASSOCIATED WITH MICROWAVE DIELECTRIC HEATING [J].

BAGHURST, DR ;

MINGOS, DMP .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1992, (09) :674-677

[4]

BAGHURST DR, 1990, J ORGANOMET CHEM, V384, P57

[5] ORGANIC-SYNTHESIS IN MICROWAVE FIELD - 1ST EXAMPLE OF SPECIFIC ACTIVATION UNDER HOMOGENEOUS CONDITIONS [J].

BERLAN, J ;

GIBOREAU, P ;

LEFEUVRE, S ;

MARCHAND, C .

TETRAHEDRON LETTERS, 1991, 32 (21) :2363-2366

[6]

BOSE AK, 1990, HETEROCYCLES, V30, P741

[7] AN EASY ROUTE TO SYNTHESIZE 1,5-ARYLODIAZEPIN-2-ONES [J].

BOUGRIN, K ;

BENNANI, AK ;

TETOUANI, SF ;

SOUFIAOUI, M .

TETRAHEDRON LETTERS, 1994, 35 (45) :8373-8376

[8]

CHEN ST, 1989, INT J PEPT PROT RES, V33, P73

[9] THE USE OF MICROWAVE-OVENS FOR RAPID ORGANIC-SYNTHESIS [J].

GEDYE, R ;

SMITH, F ;

WESTAWAY, K ;

ALI, H ;

BALDISERA, L ;

LABERGE, L ;

ROUSELL, J .

TETRAHEDRON LETTERS, 1986, 27 (03) :279-282

[10] THE RAPID SYNTHESIS OF ORGANIC-COMPOUNDS IN MICROWAVE-OVENS [J].

GEDYE, RN ;

SMITH, FE ;

WESTAWAY, KC .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1988, 66 (01) :17-26

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