Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4778762A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanofi Aventis France
Original Assignee
Roussel Uclaf SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roussel Uclaf SAfiledCriticalRoussel Uclaf SA
Publication of GB979737ApublicationCriticalpatent/GB979737A/en
C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
C07D311/22—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
Abstract
3-Methylchromone is prepared by condensing o-hydroxypropiophenone with an alkyl formate having 1 to 4 carbon atoms in the alkyl group in the presence of a solid alkali metal alcoholate having 1 to 4 carbon atoms and of a dialkyl amide of an aliphatic carboxylic acid, in which the alkyl groups may be the same or different and have 1 to 4 carbon atoms and in which the carboxylic acid has 1 to 6 carbon atoms. Specification 880,945 is referred to.
GB4778762A1961-12-271962-12-18Improvements in or relating to processes for the preparation of 3-methyl chromone
ExpiredGB979737A
(en)
A procedure for the preparation of 3-or2'-amino tiazolo - (5 ', 4'-16,17) - estra 1,3,5 (10), 16-tetraens. (Machine-translation by Google Translate, not legally binding)