Sodium hydride → 1H-Pyrrolo[2,3-b]pyridine-5-carboxylic acid, 4-(cyclohexylamino)-1-[[2-(trimethylsilyl)ethoxy]methyl]-, ethyl ester

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Reaction Conditions

Reaction Steps

A suspension of NaH (60 wt % in mineral oil, 0.077 g, 1.9 mmol) in DMF (15 mL) was cooled to about 0° C. Ethyl 4-(cyclohexylamino)-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (0.52 g, 1.8 mmol) was added and the resulting mixture was stirred for about 20 min at about 0° C. SEMCl (0.308 g, 1.84 mmol) was added and the resulting mixture was stirred for about 2 h while warming to rt. The solvent was removed under reduced pressure and the residue partitioned between EtOAc (120 mL) and saturated aqueous NH4Cl (40 mL). The organic phase was isolated, washed with brine (50 mL), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure to give ethyl 4-(cyclohexylamino)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (0.77 g, 100%): LC/MS (Table 2, Method b) Rt=3.29 min.; MS m/z: 418 (M+H)+.

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