“超硅基”基团对烯丙基硅烷和硅烯醇醚反应活性的影响。
Effect of the "supersilyl" group on the reactivities of allylsilanes and silyl enol ethers.
机构信息
Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (Haus F), 81377 München, Germany.
出版信息
Org Lett. 2010 Nov 19;12(22):5206-9. doi: 10.1021/ol102220e. Epub 2010 Oct 26.
Kinetics of the reactions of allylsilanes (1) and silyl enol ethers (2) with benzhydrylium ions (3) were studied by UV-vis spectroscopy in dichloromethane at 20 °C. The less than three times higher reaction rates of the tris(trimethylsilyl)silyl compounds in comparison to the corresponding trimethylsilyl compounds indicate that the previously reported strong electron-donating effect of the supersilyl group operates only in the α-position and not in the β-position.
通过在 20°C 的二氯甲烷中用紫外可见光谱法研究了烯丙基硅烷（1）和硅基烯醇醚（2）与二苯甲鎓离子（3）的反应动力学。与相应的三甲基硅基化合物相比，三（三甲基硅基）甲硅烷基化合物的反应速率仅高出不到三倍，表明先前报道的超甲硅烷基的强给电子效应仅在α-位起作用，而不在β-位起作用。
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