Sodium hydride → 1-Bromo-3-dimethoxyphosphorylpropane

Participants

Reaction Steps

[3-[[3-(2-Amino-2-oxoethyl)-2-bromo-1-(phenylmethyl)-1H-indol-5-yl]oxy]propyl]phosphonic acid dimethyl ester. Using the procedure described in Example 81, Part A, 1.35 g (3.8 mmol) of 2-bromo-5-hydroxy-1-(phenylmethyl)-1H-indole-3-acetamide was reacted with 170 mg (4.2 mmol) of NaH/mineral oil and then 970 mg (4.2 mmol) of (3-bromopropyl)phosphonic acid dimethyl ester to give a product that was chromatographed on silica gel (eluted with a gradient, 1% MeOH/methylene chloride→3% MeOH/methylene chloride). There was obtained 520 g (27% yield) of 3-[[3-(2-amino-2-oxoethyl)-2-bromo-1-(phenylmethyl)-1H-indol-5-yl]oxy]propyl]phosphonic acid dimethyl ester, melting approximately at 100° C. after crystallizing from methylene chloride/ether.

Provenance & Evidence