Three dianthrylethynes and an anthracene―acetylene trimer were conveniently synthesized by double elimination reactions starting from anthraldehydes and [(phenylsulfonyl)methyl]anthracenes. In the optimal one-shot process, a THF solution of these substrates and diethyl chlorophosphate was treated with LiHMDS at room temperature to give the desired alkynes in excellent yields without chromatographic
从蒽醛和[(苯磺酰基)甲基]蒽开始,通过双消除反应方便地合成了三个二蒽乙炔和一个蒽-乙炔三聚体。在最佳的一次性工艺中,这些底物和氯磷酸二乙酯的 THF 溶液在室温下用 LiHMDS 处理,以优异的收率得到所需的炔烃,无需色谱纯化。中间体乙烯基砜之一的结构通过 X 射线晶体学确定。