Ethanol → Carbamic acid, [(1S,2R)-3-[(cyclohexyloxy)[(4-aminophenyl)sulfonyl]amino]-2-hydroxy-1-(phenylmethyl)propyl]-, (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl ester

Participants

Reaction Steps

To a solution of (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-3-{(cyclohexyloxy)[(4-nitrophenyl)sulfonyl]amino}-2-hydroxypropylcarbamate (115 mg, 0.186 mmol) in a 1:1 mixture of ethanol:ethyl acetate (6 mL) was added Palladium on charcoal (10 wt %, 30 mg). The starting material was reduced under an atmosphere of Hydrogen gas over 16 hrs. The reaction mixture was filtered and evaporated in vacuo. The residue was purified on a preparative TLC plate (20×20 cm, 500 uM) eluting with 3:1 ethyl acetate:hexane. The product band was removed, eluted with 3:1 methylene chloride:methanol, filtered, 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](cyclohexyloxy)amino]-1-benzyl-2-hydroxypropylcarbamate (89 mg, 81%). H1-NMR (chloroform-D3): 1.26 (m, 6H), 1.58 (m, 5H), 2.05 (m, 2H), 2.90 (m, 4H), 3.09 (b, 2H), 3.68 (m, 2H), 3.88 (m, 4H), 4.16 (m, 1H), 4.24 (b, 1H), 4.81 (d, 1H), 5.00 (m, 1H), 5.63 (d, 1H), 6.66 (d, 2H), 7.23 (m, 5H), 7.56 (d, 2H). MS(ESI): 612(M+Na).

Provenance & Evidence