Sakaaki Horaguchi, M. Hara, Tsuneo Suzuki
Mar 1, 1982
Citations
0
Influential Citations
5
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The reaction of (8-oxo-5,6,7,8-tetrahydro-1-naphthyloxy)acetic acids with acetic anhydride and sodium acetate give a mixture of 4,5-dihydro-3H-naphtho[1,8-bc]furans and lactones. The relative yields of 4,5-dihydro-3H-naphtho[1,8-bc]furans and lactones varied according to kinds of substituents on the benzene ring of (8-oxo-5,6,7,8-tetrahydro-1-naphthyloxy)acetic acids. Substituents which make the methylene group approach closer to the carbony carbon atom of (8-oxo-5,6,7,8-tetrahydro-1-naphthyloxy)acetic acids by a steric effect seem to favor the production of 4,5-dihydro-3H-naphtho[1,8-bc]furans. On the other hand, substituents which make the methylene group separate from the carbonyl carbon atom seem to favor the production of lactones. An electron-withdrawing chlorine atom on the benzene ring of (8-oxo-5,6,7,8-tetrahydro-1-naphthyloxy)acetic acids also favors the production of 4,5-dihydro-3H-naphtho[1,8-bc]furans.