Intramolecular Acylation of Unactivated Pyridines or Arenes via Multiple C–H Functionalizations: Synthesis of All Four Azafluorenones and Fluorenones
作者:Joydev K. Laha、Krupal P. Jethava、Sagarkumar Patel、Ketul V. Patel
DOI:10.1021/acs.joc.6b02065
日期:2017.1.6
unactivated pyridines via multiple C(sp3/sp2)–H functionalizations of a methyl, hydroxymethyl, or aldehyde group has been developed providing a general access to all four azafluorenones. The application of this protocol is further demonstrated to the synthesis of azafluorenone related fused nitrogen heterocycles and fluorenones. In addition, design and synthesis of a novel fluorene based organicemitter for
π-Extended Azaborole Helicenes. A unique set of π-extended azaborole helicenes, assembled from N-heteroaromatic and dibenzo[g,p]chrysene building blocks, shows excellent optical properties. The lateral and helical extensions of the helicene scaffold significantly enhanced emission quantum yields and dissymmetry factors.
π-Extended Azaborole Helicenes。一组独特的 π 扩展的氮杂硼杂环烯,由N-杂芳烃和二苯并 [ g , p ] 结构单元组装而成,显示出优异的光学性质。helicene 支架的横向和螺旋延伸显着提高了发射量子产率和不对称因子。