ChemInform Abstract: DIE ABSORPTIONSSPEKTREN DES 3‐KETO‐2,3‐DIHYDROTHIONAPHTHENS UND SEINER DERIVATE 12. MITT. FARBSTOFFE AUF DER BASIS VON 7‐BROMNAPHTHO(1,8‐BC)THIOPYRAN‐3(2H)‐ON
Abstract:Aus der Verbindung (I) wird über die Halogenierung zu (II) das Thioessigsäurederivat (III) dargestellt, das durch Erhitzen mit Natriumacetat und Acetanhydrid zu dem Thiopyran (IV) cyclisiert.
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