Tetrahedron letters

1, 3-Dipolar cycloadditions of 2-ethoxy-and 2-(ethylthio)-1-azetines with nitrile oxides and nitrile ylides

…, RK Smalley, PD Kennewell, R Westwood

Index: Luheshi; Smalley; Kennewell; Westwood Tetrahedron Letters, 1990 , vol. 31, # 1 p. 123 - 126

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Citation Number: 17

Abstract

Tricyclic adducts (6a-c) were isolated as mixtures of dktereoisorners which could be distinguished on t. 1. c. and in their 300 MI-ix pmr spectra. So far, however, all attempts to separate the diastereoisomers by hp 1. c. have resulted in decomposition of the cycloadducts. A single-crystal X-ray structure determination on the (ethylthio)-cycloadduct (5a) has confirmed its structure and the expected regiochemisuy of the cycloaddition. The ...