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
Thermal addition of xathenethione to allenes: “A Concerted Two Step” (π2s+π2s+π2s)-cycloaddition
✍ Scribed by J. Kamphuis; R.G. Visser; H.J.T. Bos
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- French
- Weight
- 128 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
2+2)and (4+2)-cycloadducts are formed by thermal reaction of xanthenethione with allenes. Activation parameters for this "concerted two step" (a2s+s2s+n2S) reaction are presented.
Photochemical addition of thiones to allenes have well been studied'. However, thermal addi-
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