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Publication of BE635999ApublicationCriticalpatent/BE635999A/fr
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
C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C46/00—Preparation of quinones
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07D—HETEROCYCLIC COMPOUNDS
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
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Organic Chemistry
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
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