Oxygen heterocycles. Part XV. A novel heterocyclic system: 2H-pyrano[6,5-b]phenothiazine
Journal of the Chemical Society C: Organic Pub Date: DOI: 10.1039/J39690002137
Abstract
N-Ethyl-2-methoxyphenothiazine underwent formylation at the 3-position in the Vilsmeir–Haack reaction; the resulting aldehyde was condensed with aryl- and heteryl-acetonitriles to give acrylonitriles which were readily converted by pyridine hydrochloride into the 2-oxo-derivatives of the new heterocyclic system 2H-pyrano[6,5-b]phenothiazine.
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Journal Name：Journal of the Chemical Society C: Organic
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CAS no.: 89640-58-4
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