Sodium hydride → HCID 10573508, compound

Participants

Reaction Steps

As described in Example 23, 125 mg (0.43 mmol) of 5-hydroxy-2-methyl-1-(phenylmethyl)-1H-indole-3-acetamide (Example 2), 30 mg of 60% NaH/mineral oil, and 0.1 mL of 5-bromopentanoic acid methyl ester in 15 mL of DMSO were reacted to give 80 mg of 5-[[3-(2-amino-2-oxoethyl)-2-methyl-1-(phenylmethyl)-1H-indol-5-yl]oxy]pentanoic acid methyl ester, after chromatography on silica (eluted with CH2Cl2→2% MeOH/CH2Cl2). This material in 5 mL of THF and 15 mL of EtOH was treated with 2 mL of 2N NaOH and the mixture stirred for 18 hours. After acidifying with 5N HCl, the mixture was extracted with EtOAc, the EtOAc solution washed with saturated NaCl solution, dried (Na2SO4), and concentrated at reduced pressure. The residue was dissolved in MeOH/CH2Cl2, concentrated and diluted with ether to give 80 mg (100% yield) of 5-[[3-(2-amino-2-oxoethyl)-2-methyl-1-(phenylmethyl)-1H-indol-5-yl]oxy]pentanoic acid, mp, 168-169° C.

Provenance & Evidence