N-HYDROXYPYRIDINE-2-THIONE CARBAMATES .4. A COMPARISON OF 5-EXO CYCLIZATIONS OF AN AMINYL RADICAL AND AN AMINIUM CATION RADICAL

被引：94

作者：

NEWCOMB, M

DEEB, TM

MARQUARDT, DJ

机构：

[1] Department of Chemistry, M Texas University College Station

来源：

TETRAHEDRON | 1990年 / 46卷 / 07期

关键词：

D O I：

10.1016/S0040-4020(01)82012-3

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Cyclizations of the N-butyl-4-pentenaminyl radical and the N-butyl-4-pentenaminium cation radical were studied. The radicals were produced in chain reactions from the same N-hydroxypyridine- 2-thione carbamate precursor. Rate constants for cyclization of the aminyl radical and ring opening of the product thus formed at 50 °C were determined. Cyclizations of the aminium cation radical, formed by protonation of the aminyl radical, were studied under a variety of conditions. © 1990.

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页码：2317 / 2328

页数：12

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