8 + 2 cycloaddition reactions of 1,6-dimethylene cyclohepta-2,4-diene
โ Scribed by George C. Farrant; Rainer Feldmann
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- French
- Weight
- 206 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0040-4039
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## Abstract 2,3โDimethyleneโ2,3โdihydrothiophene (1), the thiophene analog of oโxylylene (oโquinodimethane), was generated __in situ__ from the (trialkylammoniomethyl)โ(trimethylsilylmethyl)thiophene iodides 4 or 5 by fluorideโinduced 1,4 climination, and was trapped by [4 + 2] cycloadditions with
Dimethylenecyclopolyenes of type 1. are an interesting class of compounds. The n=l member of this class is 3,6-dimethylene-1,4-cyclohexadiene 2 which is an important intermediate for [2.2]paracyclophane. 1 -Of two possible dimethylenecyclooctatrienes, 7,8-dimethylene-1,3,5-cyclooctatriene 2 was sy