CH576462A5CH1604872ACH1604872ACH576462A5CH 576462 A5CH576462 A5CH 576462A5CH 1604872 ACH1604872 ACH 1604872ACH 1604872 ACH1604872 ACH 1604872ACH 576462 A5CH576462 A5CH 576462A5
Authority
CH
Switzerland
Application number
CH1604872A
Original Assignee
Takeda Chemical Industries Ltd
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
Priority claimed from JP46087880Aexternal-prioritypatent/JPS50675B2/ja
Priority claimed from JP169872Aexternal-prioritypatent/JPS4932860B2/ja
Application filed by Takeda Chemical Industries LtdfiledCriticalTakeda Chemical Industries Ltd
Publication of CH576462A5publicationCriticalpatent/CH576462A5/xx
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