反应详情

A mixture of 3-benzyloxybenzenesulfonyl chloride (65 mg; 0.230 mmol), (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-3-[(cyclohexyloxy)amino]-2-hydroxypropylcarbamate (100 mg, 0.230 mmol) and diisoproylethylamine (0.042 mL, 0.242 mmol) in anhydrous tetrahydrofuran (3 mL) was stirred at ambient temperature under an Argon atmosphere for 16 hours. A catalytic quantity of dimethylaminopyridine (˜1 mg) was added and the reaction was heated at reflux for approximately one hour. An additional quantity of 3-benzyloxybenzenesulfonyl chloride (13 mg, 0.046 mmol) was added and the reaction was heated at reflux for approximately 1 hour. After cooling to ambient temperature, the reaction mixture was partitioned between ethyl acetate and aqueous hydrochloric acid. The phases were separated and the organic layer was then washed with brine, dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo. The residue was dried under high vacuum to provide (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-3-[{[3-(benzyloxy)phenyl]sulfonyl}(cyclohexyloxy)amino]-2-hydroxypropylcarbamate (140 mg, 89%). H1-NMR (chloroform-D3): 1.22 (m, 6H), 1.62 (m, 5H), 2.05 (m, 2H), 2.90 (m, 4H), 3.11 (b, 1H), 3.66 (m, 2H), 3.87 (m, 4H), 4.18 (m, 1H), 4.77 (m, 1H), 4.95 (m, 1H), 5.10 (m, 2H), 5.60 (d, 1H), 7.29 (m, 14H). MS(ESI): 703(M+Na).

1. temperaturethe reaction was heated
2. temperatureat reflux for approximately one hour
3. temperaturethe reaction was heated
4. temperatureat reflux for approximately 1 hour
5. temperatureAfter cooling to ambient temperature
6. customthe reaction mixture was partitioned between ethyl acetate and aqueous hydrochloric acid
7. customThe phases were separated
8. washthe organic layer was then washed with brine
9. dry with materialdried over anhydrous magnesium sulfate
10. filtrationfiltered
11. customevaporated in vacuo
12. customThe residue was dried under high vacuum