Synthesis of some N ‐substituted 6,7‐dimethoxy‐1,2‐benzothiazin(4 H )‐3‐one 1,1‐dioxides
1971; Wiley; Volume: 8; Issue: 6 Linguagem: Inglês
10.1002/jhet.5570080611
ISSN1943-5193
Autores Tópico(s)Quinazolinone synthesis and applications
ResumoAbstract Substituted 1,2‐benzothiazin‐3‐ones have been prepared by cyclization of 4,5‐dimethoxy‐2‐carboethoxymethybenzenesulfonamides. The latter were obtained by the action of ammonia and primary and secondary amines on 4,5‐dimethoxy‐2‐carboethoxymethylbenzenesulfonyl chloride which in turn was obtained from ethyl 3,4‐dimethoxyphenylacetate and chlorosulfonic acid.
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