ChemicalBook CAS DataBase List 5-PHENYLISOXAZOLE-3-CARBOXYLIC ACID HYD&

5-PHENYLISOXAZOLE-3-CARBOXYLIC ACID HYD& synthesis

5synthesis methods

Product Name:5-PHENYLISOXAZOLE-3-CARBOXYLIC ACID HYD&
CAS Number:90946-22-8
Molecular formula:C10H9N3O2
Molecular Weight:203.2

51677-09-9 Synthesis

5-PHENYL-ISOXAZOLE-3-CARBOXYLIC ACID METHYL ESTER

51677-09-9
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$16.00/250mg

5-PHENYLISOXAZOLE-3-CARBOXYLIC ACID HYD&

90946-22-8
23 suppliers
$45.00/50mg

Yield:90946-22-8 86%

Reaction Conditions:

with hydrazine hydrate in methanol;Reflux;

Steps:

Synthesis of 5-phenylisoxazole-3-carbohydrazide (4)

The compound 3 (2.1 g, 0.010 mol) was dissolved in50 mL of methanol, and then hydrazine hydrate (0.5 mL,0.0015 mol) was added. The reaction mixture wasrefluxed for 3-5 h. The completion of the reaction wasjudged by running TLC (hexane:ethyl acetate 3:1). Thecontents were cooled and poured on crushed ice. A fluffywhite precipitate obtained was filtered, washed with waterand dried to give 4 (1.81 g; 86.0%; m.p.: 148-149 °C, lit.148-153 °C) (Taha et al. 2015).

References:

Agrawal, Neetu;Mishra, Pradeep [Medicinal Chemistry Research,2019,vol. 28,# 9,p. 1488 - 1501]