A short synthesis of six trinaphthylenes is reported. The cyclotrinaphthylenes carry six alkoxy groups, and derivatives featuring OHex, OBu, OiPr, OPr, OEt, and OMe substituents can be obtained by an ordinary Ni(COD)(2)-promoted, Yamamoto-type coupling reaction. Cyclotrimerization yields range from 38% to 65%. Dependent upon their structure, the cyclotrinaphthylenes assume different packing patterns, according to single-crystal X-ray structure determination. The crystal structures of such trinaphthylenes were hitherto undescribed.
Synthesis of Substituted Trinaphthylenes via Aryne Cyclotrimerization
作者:Philip T. Lynett、Kenneth E. Maly
DOI:10.1021/ol9013443
日期:2009.8.20
The first synthesis of a series of substituted trinaphthylene derivatives via a palladium-catalyzed aryne cyclotrimerization is reported. This method provides an approach for the preparation of novel disk-shaped polycyclic aromatic hydrocarbons that self-assemble via π−π interactions and may form columnar liquid crystal phases. Although the trinaphthylenes prepared in this study do not exhibit columnar
据报道,通过钯催化的芳烃环三聚反应首次合成了一系列取代的三萘撑衍生物。该方法提供了一种制备新型盘状多环芳烃的方法,该盘状多环芳烃通过π-π相互作用自组装并可能形成柱状液晶相。尽管在此研究中制备的三萘嵌苯不显示柱状中间相,但可变浓度的1 H NMR研究提供了在溶液中聚集的证据。