Chalcone derivatives afford several pharmacological activities. However, a general synthetic method for 2',4'‐dihydroxy‐6'‐methoxy‐3',5'‐dimethylchalcone (DMC) derivatives has not been reported thus far. To address this, the preparation of 4',6'‐dimethoxy‐2'‐hydroxy‐3',5'‐dimethylchalcone (MDMC) derivatives, modified compounds of DMC, in excellent overall yields is reported herein. These compounds have recently attracted growing attention due to their various pharmacological activities. Di‐O‐methyl‐dimethylphloroacetophenone, the key intermediate containing the B‐ring moiety, was fabricated by four efficient reaction steps from commercially available phloroglucinol in a 50.1% isolated yield overall. Our synthetic route, which constructs the chalcone skeleton in the final stage via a Claisen–Schmidt condensation of the key intermediate with the desired benzaldehyde derivative, can rapidly produce a vast library of DMC derivatives.

中文翻译：

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4'，6'-二甲氧基-2'-羟基-3'，5'-二甲基查尔酮衍生物的总合成

查尔酮衍生物具有多种药理活性。但是，到目前为止，尚未报道2'，4'-二羟基-6'-甲氧基-3'，5'-二甲基查尔酮（DMC）衍生物的通用合成方法。为了解决这个问题，本文报道了以优异的总收率制备4'，6'-二甲氧基-2'-羟基-3'，5'-二甲基查尔酮（MDMC）衍生物，即DMC的改性化合物。这些化合物由于其各种药理活性，最近引起了越来越多的关注。二Ø通过四个有效的反应步骤，从市售的间苯三酚中以50.1％的分离产率制备了甲基的二甲基苯乙酰苯乙酮（含B-环部分的关键中间体）。我们的合成路线可通过关键中间体的Claisen-Schmidt缩合反应与所需的苯甲醛衍生物在最后阶段构建查尔酮骨架，该合成路线可以快速生成庞大的DMC衍生物库。