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JPS57126489A - Preparation of pyrazolo(1, 5-a)pyridine derivative - Google Patents

Preparation of pyrazolo(1, 5-a)pyridine derivative

Info

Publication number
JPS57126489A
JPS57126489A JP1027281A JP1027281A JPS57126489A JP S57126489 A JPS57126489 A JP S57126489A JP 1027281 A JP1027281 A JP 1027281A JP 1027281 A JP1027281 A JP 1027281A JP S57126489 A JPS57126489 A JP S57126489A
Authority
JP
Japan
Prior art keywords
compound shown
formula
methyl
reacting
basic conditions
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.)
Pending
Application number
JP1027281A
Other languages
Japanese (ja)
Inventor
Taketoshi Miura
Akira Tanaka
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.)
Mitsubishi Paper Mills Ltd
Original Assignee
Mitsubishi Paper Mills 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 Mitsubishi Paper Mills Ltd filed Critical Mitsubishi Paper Mills Ltd
Priority to JP1027281A priority Critical patent/JPS57126489A/en
Publication of JPS57126489A publication Critical patent/JPS57126489A/en
Pending legal-status Critical Current

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  • Nitrogen Condensed Heterocyclic Rings (AREA)

Abstract

PURPOSE: To obtain the titled compound industrially advantageously useful as a raw material for a hotosensitive dyestuff, etc. in a short process by a simple operation, by reacting an easily obtainable 1-methyleneamino-2-methyl-pyridinium salt under basic conditions.
CONSTITUTION: A 1-methyleneamino-2-methyl-pyridinium salt shown by the formulaI[R1WR4 are H, alkyl (e.g., methyl, ethyl, or propyl)aryl, etc,; X- is anion(halogen ion, sulfate anion, etc.); R5 is aromatic hydrocarbon, heterocyclic ring] is reacted by heating under basic conditions(triethylamine, pyridine, etc. may be cited as the base), to give the desired compound shown by the formula II. The compound shown by the formulaIis obtained in high yield by reacting a compound shown by the formula III with a compound shown by the formula R5-CHO. Or the desired compound can also be obtained by reacting directly the compound shown by the formula III with the compound shown by the formula R5-CHO under basic conditions without isolating the compound shown by the formulaI.
COPYRIGHT: (C)1982,JPO&Japio
JP1027281A 1981-01-28 1981-01-28 Preparation of pyrazolo(1, 5-a)pyridine derivative Pending JPS57126489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1027281A JPS57126489A (en) 1981-01-28 1981-01-28 Preparation of pyrazolo(1, 5-a)pyridine derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1027281A JPS57126489A (en) 1981-01-28 1981-01-28 Preparation of pyrazolo(1, 5-a)pyridine derivative

Publications (1)

Publication Number Publication Date
JPS57126489A true JPS57126489A (en) 1982-08-06

Family

ID=11745674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1027281A Pending JPS57126489A (en) 1981-01-28 1981-01-28 Preparation of pyrazolo(1, 5-a)pyridine derivative

Country Status (1)

Country Link
JP (1) JPS57126489A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001083479A3 (en) * 2000-04-28 2002-05-23 Glaxo Group Ltd Process for the preparation of pyrazolopyridine derivatives

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001083479A3 (en) * 2000-04-28 2002-05-23 Glaxo Group Ltd Process for the preparation of pyrazolopyridine derivatives

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