Imidazole → (1S,2R,3S,5R)-3-({[tert-Butyl(dimethyl)silyl]oxy}methyl)-5-{4-[(1S)-2,3-dihydro-1H-inden-1-ylamino]-7H-pyrrolo[2,3-d]pyrimidin-7-yl}cyclopentane-1,2-diol

Participants

Reaction Steps

A solution of (1R,2S,3R,5S)-3-{4-[(1S)-2,3-dihydro-1H-inden-1-ylamino]-7H-pyrrolo[2,3-d]pyrimidin-7-yl}-5-(hydroxymethyl)cyclopentane-1,2-diol (166 mg, 0.436 mmol, as prepared in Example 15a), tert-butyldimethylsilyl chloride (69.0 mg, 0.458 mmol), 1H-imidazole (44.6 mg, 0.654 mmol) in DMF (2.00 mL) was stirred under an atmosphere of nitrogen. After 2 h additional tert-butyldimethylsilyl chloride (6.00 mg, 0.0365 mmol) was added and the solution was stirred for 1 hour. The reaction was quenched with water and extracted with EtOAc. The combined organics were washed with water and saturated aqueous sodium chloride solution, dried over sodium sulfate, filtered, and concentrated in vacuo. The residue filtered through a plug of silica gel eluting with 60% EtOAc in hexanes to afford the title compound as an off white solid (179 mg, 83%). LC/MS: Rt=1.51 min, ES+ 495 (FA standard).

Provenance & Evidence