Lithiacarboranes and 1,2,4-triazine 4-oxides: S<sub>N</sub><sup>H</sup>reactions and ring transformations
作者:O. N. Chupakhin、A. M. Prokhorov、D. N. Kozhevnikov、V. L. Rusinov、I. A. Glukhov、Z. A. Starikova、V. A. Ol"shevskaya、V. N. Kalinin、M. Yu. Antipin
DOI:10.1023/b:rucb.0000042277.99035.a8
日期:2004.6
The reactions of 1-lithia-1,2- or 1,7-dicarba-closo-dodecaborane with 1,2,4-triazine 4-oxides can follow two competitive pathways: deoxygenative nucleophilic substitution of hydrogen to form 1-(1,2,4-triazin-5-yl)-1,2- or 1,7-dicarba-closo-dodecaboranes and the transformation of the 1,2,4-triazine ring into the triazoline ring giving rise to 1-(2-acetyl-1-aroyl-3-aryl-1,2,4-triazolin-5-yl)-1,2-dic
1-lithia-1,2- 或 1,7-dicarba-closo-dodecaborane 与 1,2,4-triazine 4-氧化物的反应可以遵循两种竞争途径:氢的脱氧亲核取代形成 1-(1, 2,4-triazin-5-yl)-1,2- 或 1,7-dicarba-closo-dodecaboranes 和 1,2,4-triazine 环转化为三唑啉环产生 1-(2-乙酰基-1-芳酰基-3-芳基-1,2,4-triazolin-5-yl)-1,2-dicarba-closo-ddecaboranes。将吸电子三嗪环引入碳硼烷笼中大大促进了脱硼作用,得到 1-(1,2,4-triazin-5-yl)-1,2-1,7-dicarba-nido-undecaboranes。