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ABSTRACT
Reaction of 1-(ethoxycarbonylacetyl)cyclohepta-1,3,5-triene (1) with acetic anhydride in the presence of sodium acetate gave 1,3-diacetoxy-2-acetylazulene (2) in 26% yield. On the other hand, a similar reaction in the presence of sodium acetate and aluminium chloride provided 1-acetoxy-2-acetyl-3-methylazulene (5) as a major product in 19% yield, accompanied with a 9% yield of 2.
ACKNOWLEDGMENT
This work was supported by a Grant-in-Aid for Scientific Research (No. 10640513 to S. K.) from the Ministry of Education, Science, Culture, and Sports, Japan. We thank Dr. Ryuta Miyatake for helpful discussion and also Ms. Kanae Haramoto for their technical assistance.