Medium-sized cyclophanes. Part 56. 8-Substituted 5-tert-butyl[2.2]metaparacyclophane-1,9-dienes. Preparation, X-ray diffraction study and their treatment with Lewis and protic acids
作者:Takehiko Yamato、Kozo Noda、Hirohisa Tsuzuki
DOI:10.1039/b009932p
日期:——
The preparation of various 8-substituted 5-tert-butyl[2.2]metaparacyclophane-1,9-dienes 1, using the thiacyclophane method, and an X-ray diffraction study of 5-tert-butyl-8-cyano[2.2]metaparacyclophane-1,9-diene 1e are described. Lewis and protic acid-catalyzed reactions of 8-substituted [2.2]metaparacyclophane-1,9-dienes 1b–g in dichloromethane proceeded by isomerization and transannular cyclization