ACID-CATALYZED ISOMERIZATION OF 1-ACYL- AND 1-THIOACYLAZIRIDINES .I. MECHANISM OF NUCLEOPHILIC SUBSTITUTION

被引：38

作者：

NISHIGUCHI, T

TOCHIO, H

NABEYA, A

IWAKURA, Y

机构：

[1] Department of Synthetic Chemistry, Faculty of Engineering, University of Tokyo, Tokyo

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1969年 / 91卷 / 21期

关键词：

D O I：

10.1021/ja01049a023

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

cis-1-(N-Phenylcarbamyl)- (1a) and cis-1-(N-phenylthiocarbamy1)-2,3-dimethylaziridine (lb) were isomerized to oxazoline and thiazoline derivatives with acids in several solvents, and the mechanism of the ring opening of the aziridine rings was investigated stereochemically. The isomerization of Ia with boron trifluoride etherate proceeded with complete retention of configuration in all the solvents tried. This retention of configuration was explained by front-side attack of the carbonyl oxygen on the ring carbon (SNi mechanism). With protonic acids, ring opening of Ia proceeded by an Sn2 mechanism. In the isomerization of lb, ring opening occurred by an Sn1 or an Sn2 mechanism, depending upon acid and solvent used. © 1969, American Chemical Society. All rights reserved.

引用

页码：5835 / +

页数：1