Lithium hydroxide, monohydrate → HCID 25175140, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-(3-(benzo[d]thiazol-2-yl)-1-(3,3-diphenylpropyl)ureido)cyclopentanecarboxylate 35 (308 mg, 600 μmol) in 10:1 MeOH/H2O (5.5 ml) was added lithium hydroxide hydrate (50.3 mg, 1199 μmol). The reaction mixture was stirred for overnight at 55° C. Volatiles were removed by concentration under reduced pressure. The leftover residue was solubilized with 60 mL of a 1:1 mixture of Water and Ethyl Acetate. An additional 2 mL of 2M KOH was added. The organic phase was separated and the aqueous phase was extracted further with ethyl acetate (2×20 mL). The organic extracts were discarded and the aqueous layer was acidified with 10 mL of 10% aqueous HCl and extracted with ethyl acetate (3×20 mL). The combined organic extracts were dried with magnesium sulfate, filtered, and concentrated. The residue was purified by chromatography on silica using 10->45% EtOAc/Hexanes as eluant to afford 36 as a white solid. LCMS (ES) calcd for C29H29N3O3S 499.2 found 500.2 (MH+).

Provenance & Evidence