反应详情

A solution of 42.5 mg of (2S,3S,5S)-5-[(R/S)-2-carbamoyl-1-methoxyethoxy]-2-hexyl-3-hydroxydecanoic acid (Example Kd)) in 10 ml of methylene chloride/acetonitrile (1:1) was treated with 1g of molecular sieve (4Å), 0.1 ml of triethylamine and 50 mg of HBTU. After stirring the reaction mixture was filtered and concentrated and the residue was partitioned between hexane and methanol/water (1:1); the aqueous methanolic phase was extracted with hexane, the hexane phase was dried and concentrated; the residue was subsequently chromatographed on silica gel with 5 percent methanol in methylene chloride. There were obtained 21 mg of (R/S)-3-[[(S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]dodecyl]oxy]-3-methoxypropionamide (epimers 3:1), m.p. 54°.

1. filtrationwas filtered
2. concentrationconcentrated
3. customthe residue was partitioned between hexane and methanol/water (1:1)
4. extractionthe aqueous methanolic phase was extracted with hexane
5. dry with materialthe hexane phase was dried
6. concentrationconcentrated
7. customthe residue was subsequently chromatographed on silica gel with 5 percent methanol in methylene chloride