4-((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-{[(phenylmethyl)oxy]methyl}ethyl)-6-(methyloxy)-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one → 4-[(1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-(hydroxymethyl)ethyl]-6-(methyloxy)-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-((1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-{[(phenylmethyl)oxy]methyl}ethyl)-6-(methyloxy)-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one (250.4 g, 0.547 mol), Pearlman's catalyst (25 g) and 10% Pd/C (25 g, 50% wet) in EtOH (5 L) was stirred at 50° C. under 5 bar of H2 for 3.5 h. The reaction mixture was filtered through celite and the filtrate was evaporated to give 4-[(1S)-2-{[(1,1-dimethylethyl)(dimethyl)silyl]oxy}-1-(hydroxymethyl)ethyl]-6-(methyloxy)-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one (191.2 g, 95%) as a dark blue solid.

Provenance & Evidence