ChemicalBook CAS DataBase List PYRAZOLO[1,5-A]PYRIDINE-2-CARBALDEHYDE

PYRAZOLO[1,5-A]PYRIDINE-2-CARBALDEHYDE synthesis

10synthesis methods

Product Name:PYRAZOLO[1,5-A]PYRIDINE-2-CARBALDEHYDE
CAS Number:885275-10-5
Molecular formula:C8H6N2O
Molecular Weight:146.15

76943-47-0 Synthesis

76943-47-0
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885275-10-5
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Yield:885275-10-5 91%

Reaction Conditions:

with manganese(IV) oxide in dichloromethane at 20; for 16 h;

Steps:

43B Example 43B - pyrazolo l ,5-a1pyridine-2-carbaldehvde (B-143)

To a mixture of compound B-142 (5.0 g, 34 mmol) in anhydrous dichloromethane (20 mL) was added manganese dioxide (30 g, 0.34 mol) at room temperature/The mixture was stirred at room temperature for 16 hours until TLC showed the reaction was completed. The reaction was filtered, and the filtrate was concentrated to give compound B-143 (4.5 g, 91% yield) as a brown oil.

References:

WO2015/66371,2015,A1 Location in patent:Paragraph 00286-00287