Noncovalent Li···H Interaction in the Synthesis of peri-Disubstituted Naphthalene Proton Sponges
作者:Alexander S. Antonov、Artyom A. Yakubenko
DOI:10.1055/s-0039-1690230
日期:2020.1
Noncovalent Li···H interaction was utilised as a tool for the second lithiation of 4-lithio-1,8-bis(dimethylamino)naphthalene with n-BuLi in the presence of TMEDA in hexane. Metallation proceeds with 100% selectivity in the second peri-position and with up to 90% yield. A series of 4,5-disubstituted derivatives of 1,8-bis(dimethylamino)naphthalene has been prepared in good to excellent yield after
非共价Li···H相互作用被用作在己烷中TMEDA存在下,用n -BuLi对4-lithio-1,8-双(二甲基氨基)萘进行第二次锂化的工具。在第二个周边位置,金属化以100%的选择性进行,产率高达90%。在用不同的亲电子试剂淬灭反应物质后,已经以良好的产率制备了一系列的1,8-双(二甲基氨基)萘的4,5-二取代的衍生物。