HCID 58869132, compound → HCID 58869174, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (7-benzenesulfonyl-4-oxo-chroman-2-ylmethyl)-methyl-carbamic acid tert-butyl ester (141 mg, 0.338 mmol) in THF (15 mL) cooled at −78° C. was added t-BuLi (1.7M in hexanes, 0.68 mL) dropwise. The reaction was allowed to warm to 0° C. for 3 hours, then it was quenched with CO2 (gas) and diluted with water. The volatiles were removed in vacuo and the aqueous residue was washed with Et2O and then acidified to give a white precipitate that was filtered and dried to afford 7-benzenesulfonyl-2-[(tert-butoxycarbonyl-methyl-amino)-methyl]-chroman-8-carboxylic acid (55 mg, 35% yield) as a white powder.

Provenance & Evidence