Ethyl Acetate → (R)-3-t-butyloxycarbonylamino-1-carbomethoxymethyl-3,4-dihydrocarbostyril

참여 물질

반응 단계

(R)-3-t-butyloxycarbonylamino-3,4-dihydrocarbostyril (26 mg), as prepared in Example 5, was dissolved in tetrahydrofuran (5 mL) at room temperature under argon. To the stirring solution was added methyl bromoacetate (31 mg), followed by sodium methoxide (26 mg). The resulting suspension was stirred for 30 min before dilution with ethyl acetate (25 mL) and water (25 mL). The organic phase was separated, washed with water (25 mL), and dried over anhydrous sodium sulfate. After solvent evaporation under vacuum, the crude product was purified by reverse phase preparative HPLC to provide (R)-3-t-butyloxycarbonylamino-1-carbomethoxymethyl-3,4-dihydrocarbostyril (24 mg).

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