Synthesis of New Fused Pirano[4,3-b]pyridine Derivatives
A method was developed for the synthesis of pyrano[4,3-b]thieno[3,2-e]pyridine derivatives based on the reaction of 3-amino-7-ethyl-7-methyl-7,8-dihydro-5H-pyrano[4,3-b]thieno[3,2-e]pyridine-2-carboxylic acid ethyl ester with chloroacetic acid chloride, triethyl orthoformate, hydrazine hydrate, and also phenyl chloroformate. The synthesis of various new representatives of pyrano[2″,3″:5′,6′]pyrido[3′,2′:4,5]thieno[3,2-dl-pyrimidine series was carried out.
Keywordscondensed pyrano[4,3-b]pyridines thieno[3,2-d]pyrirnidines
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- 1.Mansoor, A., Samad, A., Zaidi, H.J., and Aftab, K., Pharm. Pharmacol. Commun., 1998, vol. 4, p. 229. doi https://doi.org/10.1111/j.2042-7158.1998.tb00340.x Google Scholar