GB382124A - Improvements relating to the demethylation of alkaloids containing methoxy groups - Google Patents
Improvements relating to the demethylation of alkaloids containing methoxy groupsInfo
- Publication number
- GB382124A GB382124A GB3520031A GB3520031A GB382124A GB 382124 A GB382124 A GB 382124A GB 3520031 A GB3520031 A GB 3520031A GB 3520031 A GB3520031 A GB 3520031A GB 382124 A GB382124 A GB 382124A
- Authority
- GB
- United Kingdom
- Prior art keywords
- demethylation
- per cent
- improvements relating
- methoxy groups
- sulphuric acid
- Prior art date
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
Harmol and harmalol are manufactured by the demethylation of harmine and harmaline respectively by the action of sulphuric acid of 45-70 per cent and 40-55 per cent concentration respectively, at an elevated temperature but not exceeding 155 DEG C. Examples describe the manufacture of harmol from harmine by the action of 50 per cent sulphuric acid at 155 DEG C. and of 60 per cent sulphuric acid at 150-155 DEG C., and of harmalol from harmaline by the action of 50 per cent sulphuric acid at 155 DEG C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3520031A GB382124A (en) | 1931-12-19 | 1931-12-19 | Improvements relating to the demethylation of alkaloids containing methoxy groups |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3520031A GB382124A (en) | 1931-12-19 | 1931-12-19 | Improvements relating to the demethylation of alkaloids containing methoxy groups |
Publications (1)
Publication Number | Publication Date |
---|---|
GB382124A true GB382124A (en) | 1932-10-20 |
Family
ID=10374998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3520031A Expired GB382124A (en) | 1931-12-19 | 1931-12-19 | Improvements relating to the demethylation of alkaloids containing methoxy groups |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB382124A (en) |
-
1931
- 1931-12-19 GB GB3520031A patent/GB382124A/en not_active Expired
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