Methanol → 2-Cyclobutoxy-N-(2-methanesulfonylaminocarbonyl-indan-2-yl)-3-methyl-benzamide

Participants

Reaction Steps

A 30 mL vial is charged with 2-[(2-cyclobutoxy-3-methyl-benzoyl)-amino]-indan-2-carboxylic acid (245 mg, 0.67 mmol) and dry DCM (5.0 mL). A stirring bar is added and stirring is initiated. The methanesulfonamide (89 mg, 0.936 mmol) is added. To the resultant suspension, (N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (120 mg, 0.624 mmol) and 4-dimethylaminopyridine (76 mg, 0.62 mmol) are added. After 6 days, tlc analysis (silica, 10% MeOH in DCM) indicates that the starting acid is consumed. The reaction mixture is diluted with EtOAc (50 mL), transferred to a separatory funnel and washed with dilute aqueous HCl (3 N, 3×20 mL) and brine, dried over MgSO4, filtered and evaporated by pumping to constant weight gives 0.26 g of amorphous white foam. This material is dissolved in DCM (5 mL) and applied to a 12 g column (silica) on an ISCO Companion. The column is eluted with 1% iPrOH in DCM for 3 column volumes followed by a linear gradient to 30% iPrOH in DCM over 15 column volumes. 12 mL fractions of UV active eluent are collected. Fractions 4 through 9 are combined and evaporated to a constant weight to give 0.2 g of white solid.

Provenance & Evidence