๐”– Bobbio Scriptorium
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Sulfen als Dienophil

โœ Scribed by Priv.-Doz. Dr. G. Opitz; E. Tempel


Publisher
John Wiley and Sons
Year
1964
Tongue
English
Weight
122 KB
Volume
76
Category
Article
ISSN
0044-8249

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## Abstract At elevated temperatures the 11, 14โ€cycloadducts of tetracyanoethylene with esters of retinoic acid or with retinol acetate are transformed into 5,9โ€methanoโ€2__H__โ€cyclohepta[__b__]โ€pyridines by intermolecular ~ฯ€~4 + ~ฯ€~2โ€cycloaddition of a cyano group followed by a double bond shift. T