Basic Information | Post buying leads | Suppliers | Cas Database |
Name |
3-METHYL-2-PYRAZOLIN-5-ONE |
EINECS | 203-565-3 |
CAS No. | 108-26-9 | Density | 1.33 g/cm3 |
PSA | 41.46000 | LogP | -0.35340 |
Solubility | Ethanol: slightly soluble | Melting Point |
220-224 ºC |
Formula | C4H6 N2 O | Boiling Point | 309.7oC at 760 mmHg |
Molecular Weight | 98.1044 | Flash Point | 141.1oC |
Transport Information | N/A | Appearance | pale white crystal powder |
Safety | Moderately toxic by unspecified route. When heated to decomposition it emits toxic vapors of NOx. | Risk Codes | 36/37/38 |
Molecular Structure | Hazard Symbols | N/A | |
Synonyms |
2-Pyrazolin-5-one,3-methyl- (6CI,7CI,8CI); 2,4-Dihydro-5-methyl-3H-pyrazol-3-one;3-Methyl-1H-4,5-dihydropyrazol-5-one; 3-Methyl-2-pyrazolin-5-one;3-Methyl-5-oxo-2-pyrazoline; 3-Methyl-D2-pyrazol-5-one |
Article Data | 114 |
Conditions | Yield |
---|---|
With hydrazine In tetrahydrofuran; ethanol at 0 - 60℃; for 26h; Inert atmosphere; | 100% |
With hydrazine hydrate at 20℃; for 0.0333333h; Knorr Pyrazole Synthesis; | 100% |
With hydrazine for 0.00833333h; | 94% |
Conditions | Yield |
---|---|
With barium(II) hydroxide In water at 26℃; for 0.75h; Green chemistry; | 100% |
Conditions | Yield |
---|---|
With hydrazine hydrate In methanol at 50℃; for 3h; Temperature; Inert atmosphere; | 97.3% |
With hydrazine In ethanol |
N-acetoacetylphenylhydroxyloamine
A
N,N'-bis(isonicotinoyl)hydrazine
B
N-Phenylhydroxylamine
C
3-methyl-2-pyrazoline-5-one
D
azoxybenzene
Conditions | Yield |
---|---|
With isoniazid; triethylamine In chloroform for 24h; Heating; Further byproducts given; | A 39.5% B 32.7% C 90% D 22% |
N-acetoacetylphenylhydroxyloamine
isoniazid
A
N,N'-bis(isonicotinoyl)hydrazine
B
N-Phenylhydroxylamine
C
N-hydroxy-N-phenylisonicotinamide
D
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
triethylamine In chloroform for 24h; Heating; Further byproducts given; | A 39.5% B 32.7% C 23% D 90% |
isoniazid
A
N,N'-bis(isonicotinoyl)hydrazine
B
N-Phenylhydroxylamine
C
N-hydroxy-N-phenylisonicotinamide
D
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
With N,O-diacetylphenylhydroxylamine; triethylamine In chloroform for 24h; Heating; Further byproducts given; | A 39.5% B 32.7% C 23% D 90% |
Conditions | Yield |
---|---|
In ethanol Condensation; Cyclization; | 87% |
ethyl 2-acetyl-4,4,5,5,6,6,7,7,7-nonafluoro-3-oxoheptanoate
phenylhydrazine
A
2,2,3,3,4,4,5,5,5-Nonafluoro-pentanoic acid N'-phenyl-hydrazide
B
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
In diethyl ether at -30 - -25℃; for 1h; | A 84% B n/a |
2-Acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxo-nonanoic acid ethyl ester
phenylhydrazine
A
2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoro-heptanoic acid N'-phenyl-hydrazide
B
3-methyl-2-pyrazoline-5-one
Conditions | Yield |
---|---|
In diethyl ether at -30 - -25℃; for 1h; | A 79% B n/a |
ethyl acetoacetate
N-d-pseudoephedrinylacetic acid hydrazide
A
3-methyl-2-pyrazoline-5-one
B
(5S,6S)-4,5-dimethyl-6-phenyl-2-morpholone
Conditions | Yield |
---|---|
In isopropyl alcohol for 10h; Condensation; cyclization; elimination; Heating; | A n/a B 68% |
1. | unr-rat LDLo:600 mg/kg | BCPCA6 Biochemical Pharmacology. 14 (1965),1325. |