Sodium Hydroxide → HCID 23134795, compound

Participants

Reaction Steps

To a solution of ethyl 3-[N-[[4-[2-(3-triphenylmethyl-3H-tetrazol-5-yl)phenyl]phenyl]methyl]-N-pentanoylamino]benzoate (11.50 g) synthesized in Example 1a in dioxane (100 ml) was added 1N-aqueous sodium hydroxide solution (19 ml), and the mixture was stirred at room temperature for 5 days. The reaction mixture was concentrated, ethyl acetate and saturated aqueous potassium bisulfate solution were added to carry out partitioning and extraction. The extracted organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtrated and concentrated to give a crude product of 3-[N-[[4-[2-(3-triphenylmethyl-3H-tetrazol-5-yl)phenyl]phenyl]methyl]-N-pentanoylamino]benzoic acid. To a solution of the obtained crude product in DMA (90 ml) were added potassium carbonate (4.86 g) and a solution of 4-chloromethyl-5-methyl-1,3-dioxolen-2-one (3.92 g) in DMA (5 ml), and the mixture was stirred at room temperature for 24 hrs. The reaction mixture was poured into ethyl acetate-water to carry out partitioning and extraction. The extracted organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, filtrated and concentrated, and the residue was purified by silica gel column chromatography (hexane-ethyl acetate:1-1 v/v) to give (5-methyl-2-oxo-1,3-dioxolen-4-yl)methyl3-[N-[[4-[2-(3-triphenylmethyl-3H-tetrazol-5-yl)phenyl]phenyl]methyl]-N-pentanoylamino]benzoate (11.57 g).

Provenance & Evidence