A method for the preparation of 2-(4-methoxycarbonylpyrazol-l-yl)adenosine of formula la and 2-(4-ethoxycarbonylpyrazol-l-yl)adenosine of formula lb by reaction of 2- hydrazinoadenosine of formula III and the sodium salt of 3,3-dimethoxy-2- methoxycarbonylpropen- l-ol of formula Va or the sodium salt of 3,3-diethoxy-2- ethoxycarbonylpropen-l -ol of formula Vb in combination with a solvent and an acidic agent.
一种制备公式la的2-(4-甲氧羰基
吡唑-1-基)
腺苷和公式lb的2-(4-乙氧羰基
吡唑-1-基)
腺苷的方法,通过2-
肼基
腺苷公式III和公式Va的3,3-二甲氧基-2-甲氧羰基
丙烯-1-醇的钠盐或公式Vb的3,3-二乙氧基-2-乙氧羰基
丙烯-1-醇的钠盐在溶剂和酸性试剂的作用下反应。