A Contribution to the Direct Observation of a Didehydroheteroaromatic with a Five-Membered Ring: 2,3-Didehydrothiophene
β Scribed by Teles, Joaquim Henrique ;Hess, B. Andes ;Schaad, Lawrence J.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1992
- Tongue
- English
- Weight
- 757 KB
- Volume
- 125
- Category
- Article
- ISSN
- 0009-2940
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π SIMILAR VOLUMES
]octane (8) was prepared by addition of bromofluorocarbene to bicyclo[3.2.0]hept-6ene (5). Treatment of a solution of 8 in ether with MeLi in the presence of furan afforded the trapping product 11. The formation of the trapping product is consistent with the first generation of a five-membered ring
Attempted preparation of phosphorane 9 with a 1,3,2dioxaphosphorinane ring attached diequatorially to phosphorus led to a mixture of products from which was isolated 12-membered ring phosphorane 10, formally the dimer of 9, in low yield (22%). An X-ray crystal structure of 10 revealed a highly symme