Lithium hydroxide, monohydrate → HCID 22644793, compound

Participants

Reaction Steps

The 1-(4-but-2-ynyloxy-benzenesulfonyl)-4-(morpholine-4-carbonyl)-piperazine-2-carboxylic acid ethyl ester (0.56 g, 1.18 mmol) was dissolved in THF/MeOH/H2O (3 mL each) and treated with lithium hydroxide monohydrate (0.099 g, 2.3 mmol). The reaction was heated at reflux overnight and then concentrated and acidified to pH 4 with acetic acid. The solution was extracted with methylene chloride and then washed with water, brine, dried over Na2SO4, filtered and concentrated in vacuo to provide 0.298 g (53%) of 1-(4-but-2-ynyloxy-benzenesulfonyl)-4-(morpholine-4-carbonyl)-piperazine-2-carboxylic acid as a yellow powder.

Provenance & Evidence