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Photochemistry of alkylated 4,4-dimethoxy-2,5-cyclohexadienones in methanol. Synthesis of methyl ester of (±)-desepoxy-2,5-didehydromethylenomycin A
✍ Scribed by Fang-Tsao Hong; Kung-Shing Lee; Chun-Chen Liao
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- French
- Weight
- 248 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
methyl ester 9 are synthesized from anthracene aclduct 2 via a common intermediate 13 Flash vacuum pyrolysis of adduct 13 gives 8 , while stereospecific epoxidation of 13 followed by pyrolysis yields 9 .
The irradiation of 4-alkyl-4-alkoxy-2,5-cyclohexadienones 3a-d at 366 nm in methanol -af ords 4-(alkyldimethoxymethyl)cyclopent-2-en-l-ones 5a-d. --
Although the photochemistry of 2,5-cyclohexadienones has been elegantly and thoroughly investigated,' no example with a 4-vinyl substituent has been studied. We report here on the