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ChemicalBook CAS DataBase List 4-(2-CHLORO-ACETYL)-1,5-DIMETHYL-2-PHENYL-1,2-DIHYDRO-PYRAZOL-3-ONE
6630-73-5

4-(2-CHLORO-ACETYL)-1,5-DIMETHYL-2-PHENYL-1,2-DIHYDRO-PYRAZOL-3-ONE synthesis

3synthesis methods
-

Yield:6630-73-5 70%

Reaction Conditions:

at 95 - 100; for 4 h;

Steps:

A. Synthesis of 4-chloroacetyl-antipyrine (1)(CA):

To 100 mL round-bottomed flask charged with antipyrine(1.88 g, 10 mmol), chloroacetyl chloride (1.2 mL, 15 mmol) wasadded. The produced paste was heated at 95-100 °C for 4 h and then left to cool. The paste was distributed in ice-cold water to solidify and the solid was collected, then recrystallized from ethanol to yield 4-chloroacetyl-antipyrine (1). Yellow crystals, yield 70%, m.p. 165-166 C, lit. m.p. 164-165° C[16]. FT-IR (KBr) (Figure S1)m/cm1 = 1655 (C = O), 1618 (C = N).

References:

Abou-Melha, Khlood;El-Metwaly, Nashwa;Wael Saber, Renad [Journal of Molecular Liquids,2022,vol. 359,art. no. 119361]

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