Acetic Acid → ethyl 3-(3-((((1R,2R,3S,4R)-4-(4-((2,4-dimethoxybenzyl)amino)-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-2,3-dihydroxycyclopentyl)methyl)amino)cyclobutyl)propanoate

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반응 단계

Sodium triacetoxyborohydride (2.43 g, 11.5 mmol) was added to a solution of (1S,2R,3R,5R)-3-(aminomethyl)-5-(4-((2,4-dimethoxybenzyl)amino)-7H-pyrrolo[2,3-d]pyrimidin-7-yl)cyclopentane-1,2-diol (2.6 g, 5.7 mmol) and ethyl 3-(3-oxocyclobutyl)propanoate (0.976 g, 5.73 mmol) and Acetic acid (0.326 ml, 5.73 mmol) in 1,2-Dichloroethane (20 ml) and reaction was stirred at RT overnight. NaHCO3 was added and the aqueous layer was extracted 3× with DCM. The combined organics were dried with MgSO4, filtered, concentrated and purified by flash chromatogrpahy (DCM/7N NH3 in MeOH 90:10) to give the desired compound (1.8 g) as a thick yellow resin.

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