5-Benzyl-2-oxazolidone derivatives and a process for producing the same
Patent 4062862 Issued on December 13, 1977. Estimated Expiration Date: 
December 13, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 13, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3020262 3133932 InventorsAssigneeApplicationNo. 05/701506 filed on 07/01/1976US Classes:548/229, Chalcogen bonded directly at 2-position of the oxazole ring544/221, To three ring carbons548/230, Nitrogen, halogen, or -C(=X)-, wherein X is chalcogen, attached directly to the oxazole ring by nonionic bonding548/231, 3-position substituent contains ethylenic or acetylenic unsaturation or nitrogen548/232, 4- or 5-position substituent contains chalcogen549/512, The hetero ring is three-membered consisting of one oxygen and two carbons549/554, Chalcogen attached indirectly to the hetero ring by nonionic bonding549/561, The chalcogen, X, is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens549/563, Halogen attached indirectly to the hetero ring by nonionic bonding560/30Halogen in acid moietyExaminersPrimary: Rush, Raymond V.Attorney, Agent or FirmForeign Application Priority Data1975-07-04 JAAbstract5-Benzyl-2-oxazolidone derivatives of the formula: ##STR1## wherein R1 represents a hydrogen, halogen, lower alkyl, trihalogenomethyl, phenyl, benzyl, hydroxy, lower alkoxy, phenoxy, benzyloxy, acyloxy, allyloxy, alkylcarbonyl, arylcarbonyl or alkylenedioxy group, and R2 represents a hydrogen atom, a lower alkyl, lower alkylcarbonyl, lower-dialkylamino-lower-alkyl, aryl, aralkyl or arylcarbonyl group.Other References
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