FI885708A - FOERFARANDE FOER METYLERING AV XANTINER. - Google Patents

FOERFARANDE FOER METYLERING AV XANTINER. Download PDF

Info

Publication number
FI885708A
FI885708A FI885708A FI885708A FI885708A FI 885708 A FI885708 A FI 885708A FI 885708 A FI885708 A FI 885708A FI 885708 A FI885708 A FI 885708A FI 885708 A FI885708 A FI 885708A
Authority
FI
Finland
Prior art keywords
xantiner
metylering
foerfarande foer
foerfarande
foer
Prior art date
Application number
FI885708A
Other languages
Finnish (fi)
Other versions
FI89485C (en
FI89485B (en
FI885708A0 (en
Inventor
Georg Hilgers
Jutta Kroeber
Original Assignee
Boehringer Ingelheim Kg
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 Boehringer Ingelheim Kg filed Critical Boehringer Ingelheim Kg
Publication of FI885708A0 publication Critical patent/FI885708A0/en
Publication of FI885708A publication Critical patent/FI885708A/en
Application granted granted Critical
Publication of FI89485B publication Critical patent/FI89485B/en
Publication of FI89485C publication Critical patent/FI89485C/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D473/00—Heterocyclic compounds containing purine ring systems
    • C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
    • C07D473/04—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms
    • C07D473/06—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms with radicals containing only hydrogen and carbon atoms, attached in position 1 or 3

Abstract

A process in which dimethyl carbonate is used as methylating agent.
FI885708A 1987-12-10 1988-12-09 Methods for methylating xanthines FI89485C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873741883 DE3741883A1 (en) 1987-12-10 1987-12-10 METHOD FOR METHYLATING XANTHINES
DE3741883 1987-12-10

Publications (4)

Publication Number Publication Date
FI885708A0 FI885708A0 (en) 1988-12-09
FI885708A true FI885708A (en) 1989-06-11
FI89485B FI89485B (en) 1993-06-30
FI89485C FI89485C (en) 1993-10-11

Family

ID=6342299

Family Applications (1)

Application Number Title Priority Date Filing Date
FI885708A FI89485C (en) 1987-12-10 1988-12-09 Methods for methylating xanthines

Country Status (5)

Country Link
EP (1) EP0319854B1 (en)
JP (1) JPH0645620B2 (en)
AT (1) ATE102200T1 (en)
DE (2) DE3741883A1 (en)
FI (1) FI89485C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW225535B (en) * 1992-11-10 1994-06-21 Hoechst Ag
GB9418499D0 (en) * 1994-09-14 1994-11-02 Ciba Geigy Ag Process for producing n-methylated organic pigments
CN103724348B (en) * 2013-12-16 2016-04-27 吉林省舒兰合成药业股份有限公司 A kind of preparation method of Theobromine
CN104892611B (en) * 2015-05-19 2017-03-22 青岛科技大学 Synthetic method of caffeine
CN112724143B (en) * 2021-02-07 2022-04-15 河北工业大学 Method for preparing theobromine by methylating 3-methylxanthine

Also Published As

Publication number Publication date
FI89485C (en) 1993-10-11
FI89485B (en) 1993-06-30
EP0319854A2 (en) 1989-06-14
EP0319854B1 (en) 1994-03-02
DE3741883A1 (en) 1989-06-22
FI885708A0 (en) 1988-12-09
JPH0645620B2 (en) 1994-06-15
EP0319854A3 (en) 1991-03-27
JPH01190686A (en) 1989-07-31
ATE102200T1 (en) 1994-03-15
DE3888113D1 (en) 1994-04-07

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Legal Events

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BB Publication of examined application
MM Patent lapsed
MM Patent lapsed

Owner name: BOEHRINGER INGELHEIM KG