A method of making didanosine (ddI) including the steps of: (a) obtaining an enzyme expressing ddA deaminase activity; (b) immobilizing the enzyme onto an insoluble support; (c) contacting the enzyme with a dideoxyadenosine (ddA) solution of at least about 4% weight volume ddA in water for a time and under conditions to produce a ddI solution; and (d) isolating the ddI from the ddI solution. Optionally, the ddI mother liquor is reused in subsequent runs to improve yield.
制备
地达诺辛(ddI)的方法包括以下步骤:(a) 获取表达ddA脱
氨酶活性的酶;(b) 将酶固定在不溶性支持物上;(c) 将酶与至少含有约4%重量体积ddA的二脱氧
腺苷(ddA)溶液在
水中接触一段时间并在条件下制备ddI溶液;(d) 从ddI溶液中分离ddI。可选地,ddI母液可在后续运行中重新使用以提高产量。