PHOTOLYSIS OF A BETA-AZO PERESTER, A BIFUNCTIONAL INITIATOR - THE FRAGMENTATION RATE OF A BETA-PEROXY ESTER RADICAL DETERMINED BY THE CYCLOPROPYLCARBINYL CLOCK METHOD

被引：12

作者：

ENGEL, PS

WU, AY

机构：

[1] Department of Chemistry, Rice University, Houston, Texas 77251

来源：

JOURNAL OF ORGANIC CHEMISTRY | 1994年 / 59卷 / 14期

关键词：

D O I：

10.1021/jo00093a031

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Two free radical initiators containing an azo group and a perester moiety on adjacent carbons have been prepared. On long wavelength W irradiation, these compounds lose nitrogen to afford beta-perester radicals. The cyclopropylcarbinyl radical clock technique has been used to determine that the lifetime of these radicals at 25 degrees C toward beta-scission and decarboxylation is 480 ns. The potential utility of beta-azo peresters as bifunctional free radical initiators is briefly discussed.

引用

页码：3969 / 3974

页数：6

共 46 条

[1] THE MEASUREMENT OF THE ONE-FOLD ROTATIONAL BARRIER OF ECLIPSED BONDS - A DYNAMIC NMR DETERMINATION OF N-O OR N-CH2 BOND ROTATION IN N-ALKOXY-2,2,6,6-TETRAMETHYLPIPERIDINES OR N-ALKYL-2,2,6,6-TETRAMETHYLPIPERIDINES [J].