Laying the way to meta -functionalization of naphthalene proton sponge via the use of Schlosser's superbase
作者:Alexander S. Antonov、Victor G. Bardakov、Alexander F. Pozharskii、Mikhail A. Vovk、Alexander D. Misharev
DOI:10.1016/j.jorganchem.2017.12.007
日期:2018.1
Lithiation of 1,8-bis(dimethylamino)naphthalene (DMAN) with Schlosser's superbase (n-BuLi–t-BuOK) in the presence of TMEDA in hexane was examined. It has been shown that, compared with previously studied n-BuLi–TMEDA or t-BuLi–TMEDA mixtures, this reagent provides much more selective meta-lithiation. A variety of 3-substituted and 3,6-disubstituted derivatives of DMAN has been prepared in a good to
在己烷中存在TMEDA的情况下,研究了1,8-双(二甲基氨基)萘(DMAN)与Schlosser的超强碱(n-BuLi–t-BuOK)的锂化。已经显示的是,与先前研究相比Ñ正丁基锂- TMEDA或吨正丁基锂- TMEDA的混合物,该试剂提供了更多的选择的元-lithiation。在用不同的亲电子试剂淬灭反应物料后,已经以良好至合理的产率制备了多种DMAN的3-取代的和3,6-二取代的衍生物。还证明了进一步引入引入的间位取代基以合成更复杂的DMAN 3-取代衍生物的可能性。