(3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-3-{(1-ethylpropoxy)[(4-nitrophenyl)sulfonyl]amino}-2-hydroxypropylcarbamate → (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-3-[[(4-aminophenyl)sulfonyl](1-ethylpropoxy)amino]-1-benzyl-2-hydroxypropylcarbamate

Participants

Reaction Steps

A solution of (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-3-{(1-ethylpropoxy)[(4-nitrophenyl)sulfonyl]amino}-2-hydroxypropylcarbamate (237 mg, 0.390 mmol) in absolute methanol (5 mL) was combined with Palladium on carbon (10 wt %, 50 mg) and reduced under a Hydrogen atmosphere over 16 hours. The reaction was filtered and evaporated in vacuo. The residue was purified on silica gel eluting with 50-60% ethyl acetate in hexane. Fractions containing the product were combined and evaporated in vacuo. The residue was triturated with water, filtered and dried under high vacuum to provide (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-3-[[(4-aminophenyl)sulfonyl](1-ethylpropoxy)amino]-1-benzyl-2-hydroxypropylcarbamate (160 mg, 71%) as a white solid. H1-NMR (chloroform-D3): 0.90 (m, 6H), 1.58 (m, 7H), 2.95 (m, 5H), 3.69 (m, 2H), 3.91 (m, 4H), 4.13 (m, 1H), 4.26 (b, 2H), 4.80 (d, 1H), 5.00 (m, 1H), 5.63 (d, 1H), 6.67 (d, 2H), 7.22 (m, 5H), 7.58 (d, 2H).). MS(ESI): 600(M+Na).

Provenance & Evidence