Methyl N-(triethylammoniosulfonyl)carbamate → (S)-4'-(2-(4-(tert-Butoxycarbonylamino)tetrahydro-2H-pyran-4-carboxamido)-2-cyanoethyl)biphenyl-4-yl methanesulfonate

Participants

Reaction Steps

(S)-4′-(3-Amino-2-(4-(tert-butoxycarbonylamino)tetrahydro-2H-pyran-4-carboxamido)-3-oxopropyl)biphenyl-4-yl methanesulfonate (Example 6, step (i), 234 mg) in dichloromethane (8 mL) was treated with Burgess' reagent (199 mg) and the mixture was stirred at room temperature for 18 h. It was partially evaporated and then purified by chromatography on silica using diethyl ether and then 1:1 ethyl acetate/isohexane as eluent to a afford the sub-titled compound as a white solid (267 mg).

Provenance & Evidence