Nucleophilic attack of acetylide anions at the two carbonyl moieties of para-quinones readily affords the corresponding diols. Subsequent reduction with stannous chloride affords a number of useful compounds, including 1,4-bis[(trimethylsilyl)ethynyl]benzene, 1,4-bis[(trimethylsilyl)ethynyl]naphthalene and 9,10-bis[(trimethylsilyl)ethynyl]anthracene. Sequential attack by different acetylide anions followed by reduction provides a useful route to differentially substituted compounds including 1-[(4-nonyloxyphenyl)ethynyl]-4-(phenylethynyl)benzene, a new luminescent liquid-crystalline material.
对位醌的两个羰基受到乙酰阴离子的亲核攻击,很容易生成相应的二元醇。随后用
氯化亚锡还原可得到许多有用的化合物,包括 1,4-双[(三甲基
硅基)
乙炔基]苯、1,4-双[(三甲基
硅基)
乙炔基]
萘和 9,10-双[(三甲基
硅基)
乙炔基]
蒽。不同乙酰阴离子的顺序攻击和还原为获得不同取代的化合物提供了有用的途径,其中包括 1-[(4-壬氧基苯基)
乙炔基]-4-(苯基
乙炔基)苯,这是一种新型发光液晶材料。