Effects of structure on the ease of electron removal from o-phenylenediamines. 2. Photoelectron spectra of o-phenylenediamines
作者:Stephen F. Nelsen、Loretta A. Grezzo、William C. Hollinsed
DOI:10.1021/jo00315a011
日期:1981.1
Ruthenium-Catalyzed Regiospecific Borylation of Methyl C−H Bonds
作者:Jaclyn M. Murphy、Joshua D. Lawrence、Kazumori Kawamura、Christopher Incarvito、John F. Hartwig
DOI:10.1021/ja064092p
日期:2006.10.1
the methylgroup that is least stericallyhindered. In contrast to most organometallic C-H activation, the reactions of alkanes occurred in higher yields than the reactions of arenes. Reactions were conducted that probed steric and electronic effects on the alkyl borylation. These reactions showed that the borylation occurred preferentially at the methylgroup that is least stericallyhindered and
我们报告了饱和末端 CH 键的区域特异性、钌催化硼化。以78-98%的产率获得烷基硼酸酯。烷烃、三烷基胺、受保护的醇和氟烷烃的硼酸化发生在空间位阻最小的甲基上。与大多数有机金属 CH 活化相反,烷烃反应的产率高于芳烃反应。进行反应以探测对烷基硼化的空间和电子效应。这些反应表明硼酸化优先发生在空间位阻最小和最缺电子的甲基。合成了含有硼基配体的钌化合物,并通过 X 射线晶体学表征了一种。
Electronic structure of heterospirenes. PE spectroscopic investigations