申请人:Nutrichem Company Limited
公开号:US08278445B2
公开(公告)日:2012-10-02
Preparation method of a compound of general formula (I) comprises the following steps: (1) a compound of general formula (II) reacts with a formylating agent in an aprotic solvent at a temperature between −20° C. and 200° C. in the presence of a Lewis acid, then an organic base is added to promote the reaction to obtain an intermediate product; (2) the above intermediate product reacts with a methylating agent in the presence of an alkali at a temperature between −20° C. and 100° C. to obtain the compound of formula (I).
一种通式为(I)的化合物的制备方法包括以下步骤:(1)将通式为(II)的化合物与酰甲基化试剂在无质子溶剂中,在存在路易斯酸的情况下,在温度为-20℃至200℃之间反应,然后加入有机碱促进反应,以得到中间产物;(2)上述中间产物在碱的存在下,在温度为-20℃至100℃之间,与甲基化试剂反应,以得到通式为(I)的化合物。