Ethyl Acetate → HCID 70132709, compound

Participants

Reaction Steps

200 mg of 1,6-di-O-acetyl-3-bromo-3,4-dideoxy-α-D-glycero-hex-3-enopyranos-2-ulose prepared in the same manner as in the above Intermediate Preparation Example 4 from 1,6-anhydro-3-bromo-3,4-dideoxy-β-D-glycero-hex-3-enopyranos-2-ulose (Intermediate No. 4) prepared by the method disclosed in Carbohydrate Research (1981), Vol. 93, 284-287, was dissolved in 6 ml of tetrahydrofuran-water (5:1), and 70 mg of lithium hydroxide monohydrate was added thereto. The mixture was stirred at room temperature for 30 minutes. To the reaction solution, 100 ml of ethyl acetate was added. The mixture was washed three times with 100 ml of a saturated sodium chloride aqueous solution. The organic layer was dried over anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure. The obtained syrup crude product was purified by thin layer chromatography for separation (NO-5744, manufactured by Merck, ethyl acetate: hexane=1:1) to obtain 40 mg of the desired product (Intermediate No. 18) as a slightly yellow liquid. The NMR analytical data of this product are as follows.

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