tert-Butanol → HCID 178452647, compound

Participants

Reaction Conditions

Reaction Steps

2-{[(5-Chloropyridin-2-yl)amino]carbonyl}-3-({[trans-4-(3-oxomorpholin-4-yl)cyclohexyl]carbonyl}amino)furo[3,2-b]pyridine-5-carboxylic acid (6.80 g) obtained in Example 79 is suspended in t-butanol (300 ml). To the suspension are added triethylamine (3.48 ml) and diphenylphosphoryl azide (5.39 ml) at room temperature, and the mixture is stirred at 100° C. for 15 hours. The reaction solution is concentrated under reduced pressure. The residue is diluted with chloroform, and washed with water and saturated brine. The organic layer is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform/methanol=100/1 followed by 20/1) to give the title compound (5.64 g).

Provenance & Evidence