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Expired
Application number
GB54/51A
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Spofa Vereinigte Pharma Werke
Spofa United Pharmaceutical Works National Corp
Original Assignee
Spofa Vereinigte Pharma Werke
Spofa United Pharmaceutical Works National Corp
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Application filed by Spofa Vereinigte Pharma Werke, Spofa United Pharmaceutical Works National CorpfiledCriticalSpofa Vereinigte Pharma Werke
Publication of GB688791ApublicationCriticalpatent/GB688791A/en
C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
C07D493/04—Ortho-condensed systems
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Pyrane Compounds
(AREA)
Abstract
Coumarine derivatives of the general formula <FORM:0688791/IV (b)/1> wherein R represents an alkyl radical, are prepared by heating an aliphatic acid anhydride and bis-4-oxycoumarinyl-3-acetic acid or the lactone of bis-4-oxycoumarinyl-3-acetic acid. The preferred aliphatic acid anhydrides are those of the aliphatic acids having less than 5 carbon atoms, e.g. acetic or propionic acid. In the examples compounds of the above general formula are prepared wherein R represents the methyl and ethyl radicals. Specification 675,784 is referred to.
GB54/51A1949-12-311951-01-01Method of manufacture of biologically active coumarine derivatives
ExpiredGB688791A
(en)
Procedure for the preparation of new acids 4- (4 bifenilil) -4-hydroxy-butirrics, its esteres or lactonas. (Machine-translation by Google Translate, not legally binding)