HUT47293A - Process for producing pyrimido-oxazine derivatives
- Google Patents
Process for producing pyrimido-oxazine derivatives
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Publication number
HUT47293A
HUT47293AHU193787AHU193787AHUT47293AHU T47293 AHUT47293 AHU T47293AHU 193787 AHU193787 AHU 193787AHU 193787 AHU193787 AHU 193787AHU T47293 AHUT47293 AHU T47293A
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Application filed by Gyogyszerkutato IntezetfiledCriticalGyogyszerkutato Intezet
Priority to HU193787ApriorityCriticalpatent/HU198062B/en
Publication of HUT47293ApublicationCriticalpatent/HUT47293A/en
Publication of HU198062BpublicationCriticalpatent/HU198062B/en
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
Novel pyrimido-(5,4b)(1,4)oxazine derivs., of formula (I), where R1 = H, 1-4C alkyl gp.; or phenyl gp.; R2: as in this case, a halogen atom, nitro gp., or 1-4C alkyl gp., are prepd. from cpds. of tautomeric formulae (IIa) and (IIb) and sulpho-chloride cpds. of general formula R2-SO2Cl (III), in the presence of a polar solvent and base. - Cpds. (I) are isolated and used as pharmaceutical intermediates.
HU193787A1987-04-291987-04-29Process for producing new pyrimidooxazine derivatives
HU198062B
(en)
Substituted phenylsulfonylurea derivatives,a process for their preparation and their use as herbicides,and new intermediate products for their preparation