NEW IMIDAZOBENZOTHIAZINE DERIVATIVE

NEW IMIDAZOBENZOTHIAZINE DERIVATIVE

PROBLEM TO BE SOLVED: To obtain the subject new compound expected to have utility as medicine and agrochemical. SOLUTION: This compound is shown by formula I (R1 is a 1-6C alkyl; R2 is a 1-2C alkyl; R2 and R3 are each a 1-2C alkyl, a halogen or nitro) such as 4H-imidazo[2,1-c][1,4]benzothiazine-2-ca...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MIYAKOSHI TETSUO, NISHIYAMA HIROYUKI, KUROKI MASATAKA, AYABE SEIJI
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To obtain the subject new compound expected to have utility as medicine and agrochemical. SOLUTION: This compound is shown by formula I (R1 is a 1-6C alkyl; R2 is a 1-2C alkyl; R2 and R3 are each a 1-2C alkyl, a halogen or nitro) such as 4H-imidazo[2,1-c][1,4]benzothiazine-2-carboxylate, etc. The compound is obtained, for example, by reacting a 1,4-benzothiazine derivative of formula II as a starting raw material with a halopyruvic acid ester such as ethyl bromopyruvate to give a quaternary ammonium salt of formula III as an intermediate and heating the intermediate under reflux.