Eine Cyanogruppe als Dienophil in einer intramolekularen π4 + π2-Cycloaddition

✍ Scribed by Karl-Heinz Pfoertner; Will E. Oberhänsli

• Publisher: John Wiley and Sons
• Year: 1975
• Tongue: German
• Weight: 655 KB
• Volume: 58
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19750580321

✦ Synopsis

Abstract

At elevated temperatures the 11, 14‐cycloadducts of tetracyanoethylene with esters of retinoic acid or with retinol acetate are transformed into 5,9‐methano‐2__H__‐cyclohepta[b]‐pyridines by intermolecular ~π~4 + ~π~2‐cycloaddition of a cyano group followed by a double bond shift. The resulting structure was determined by x‐ray analysis.