GB382124A - Improvements relating to the demethylation of alkaloids containing methoxy groups - Google Patents

Improvements relating to the demethylation of alkaloids containing methoxy groups

Info

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
Application number
GB3520031A
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.)
HYMAN HENRY LIONEL LEVENE
Boots Pure Drug Co Ltd
Original Assignee
HYMAN HENRY LIONEL LEVENE
Boots Pure Drug Co 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
Application filed by HYMAN HENRY LIONEL LEVENE, Boots Pure Drug Co Ltd filed Critical HYMAN HENRY LIONEL LEVENE
Priority to GB3520031A priority Critical patent/GB382124A/en
Publication of GB382124A publication Critical patent/GB382124A/en
Expired legal-status Critical Current

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.
GB3520031A 1931-12-19 1931-12-19 Improvements relating to the demethylation of alkaloids containing methoxy groups Expired GB382124A (en)

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)

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