Ethyl 5-methylisoxazole-3-carbamate

Ethyl 5-methylisoxazole-3-carbamate Sodium hydroxide Acetylsulfanil chloride... 

Preparation of 3-Amino-5-Methylisoxazole 1.7 grams of ethyl 5-methylisoxazole-3-carbamate was heated on a boiling water-bath with 5 cc of a 10% aqueous sodium hydroxide solution for 8 hours, then the reaction mixture was extracted several times with ether or benzene and the extract was cooled followed by the removal of the solvent and drying. The residue was solidified after a while and gave prismatic crystals, melting point 61° to 62°C, of 3-amino-5-methylisoxazole by recrystallization from benzene. 

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