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Paper | Regular issue | Vol 36, No. 5, 1993, pp.1105-1113
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6287
Preparation of [1]Pyrido[3’,2’:5,6]thiopyrano[4,3,2-de]quinoline

Hidetoshi Fujiwara* and Ichizo Okabayashi

*Niigata College of Pharmacy, 5-13-2 Kamishin’ei-cho, Niigata 950-2081, Japan


New tetracyclic compound, pyrido[3’,2’:5,6]thiopyrano[4.3,2-de]quinoline (1) was synthesized from 6-amino-5H-[1]benzothiopyrano[2,3-b]pyridin-5-one (2) in a ten step sequence.