Hydrazine hydrate (1:1) → 5-[4-(2-Aminooxyethoxy)benzyl]thiazolidine-2,4-dione

Participants

Reaction Conditions

Reaction Steps

0.32 ml of hydrazine monohydrate was added to a suspension of 2.64 g of 5-[4-(2-phthalimidooxyethoxy)-benzyl]thiazolidine-2,4-dione [prepared as described in step (d) above] in 30 ml of ethanol, and the resulting mixture was stirred at 80° C. for 2 hours. At the end of this time, the reaction mixture was cooled and the precipitated phthalhydrazide was filtered off. The filtrate was concentrated by evaporation under reduced pressure, and the concentrate was purified by column chromatography through silica gel, using a 1:20 by volume mixture of methanol and methylene chloride as the eluent, to give 1.93 g of 5-[4-(2-aminooxyethoxy)benzyl]-thiazolidine-2,4-dione as a syrup.

Provenance & Evidence