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Communication | Regular issue | Vol 14, No. 1, 1980, pp.15-18
Published online, 1st January, 1970
DOI: 10.3987/R-1980-01-0015
Some Novel Reactions of Benzoxazole Derivatives with Dimethyl Acetylenedicarboxylate

Norio Kawahara,* Michiko Katsuyama, Tsuneo Itoh, and Haruo Ogura

*Hokkaido College of Pharmacy, 7-1 Katsuraoka-cho, Otaru 047-02, Japan


Benzoxazole derivatives (1) and dimethyl acetylenedicarboxylate (DMAD) gave novel tricyclic compound (6) through the [2+4] cycloaddition of 3 and DMAD together with a solvent addition product (4) and a ring-opened compound (5) in alcoholic solvent at room temperature.