5-(4-Fluoro-phenyl)-1-methyl-1,2-dihydropyrazol-3-one synthesis

3synthesis methods

Product Name:5-(4-Fluoro-phenyl)-1-methyl-1,2-dihydropyrazol-3-one
CAS Number:623577-33-3
Molecular formula:C10H9FN2O
Molecular Weight:192.19

42122-44-1 Synthesis

42122-44-1
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$155.00/50mg

60-34-4
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$65.59/25g

5-(4-Fluoro-phenyl)-1-methyl-1,2-dihydropyrazol-3-one

623577-33-3
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Yield:623577-33-3 55%

Reaction Conditions:

with water in methanol at 20 - 60;

Steps:

A

To a solution of methyl 4- (fluorophenyl) propynoate (J. Org. Chem. 1987,52 (16), 3662-8) (13g, 73mmol) in methanol (60ML) was added water (60ML) followed by methylhydrazine (4ML, 77mmol), the mixture was stirred for 6hrs at 60°C then left to stand overnight. The solid was filtered and washed with water then a minimum volume of methanol and dried overnight, affording 7.7g OF 5- (4-FLUOROPHENYL)-1- METHYL-1, 2-dihydropyrazol-3-one (55%). 8 (LH, 500MHZ, CDC13) 3.68 (3H, s), 5.68 (1H, s), 7.13-7. 17 (2H, m), 7.37-7. 40 (2H, m).

References:

WO2004/39370,2004,A1 Location in patent:Page/Page column 15

2928-14-5 Synthesis

2928-14-5
34 suppliers
$82.50/1g

60-34-4
2 suppliers
$65.59/25g

623577-33-3
11 suppliers
inquiry

References

2928-14-5 Synthesis

2928-14-5
34 suppliers
$82.50/1g

60-34-4
2 suppliers
$65.59/25g

623577-33-3
11 suppliers
inquiry

3H-Pyrazol-3-one, 5-(4-fluorophenyl)-1,2-dihydro-2-methyl-

777953-39-6
0 suppliers
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References