design and synthesis of stable 1,2-dithietane derivatives for the generation of diatomicsulfur (S 2 ) was undertaken. Computer-aided evaluation of enthalpic differences was used to direct the synthesis of target compounds and, although all of the compounds calculated to afford S 2 that were prepared did yield diatomicsulfur, an isolable 1,2-dithietane other than dithiatopazine failed to materialize
对用于生成双原子硫 (S 2 ) 的稳定 1,2-二硫杂环丁烷衍生物的设计和合成进行了详细研究。焓差的计算机辅助评估用于指导目标化合物的合成,尽管计算出的所有化合物均能提供所制备的 S 2 确实产生了双原子硫,但除二硫托嗪之外的可分离 1,2-二硫杂环丁烷未能实现
Synthesis of aryl [5]helicenes through Suzuki-Miyaura reaction and their optical properties
series of arylated [5]helicenes have been effectively obtained through palladium catalyzed Suzuki-Miyaura reaction, starting from 7,8-dibromo [5]helicene under mild conditions. Opticalproperties of [5]helicene derivatives were studied by UV–vis and fluorescence spectra, and both maximum absorption wavelength and emission wavelength showed red-shift compared with [5]helicene. This Pd-catalyzed coupling
Palladium-Catalyzed Annulation of<i>vic</i>-Bis(pinacolatoboryl)alkenes and -phenanthrenes with 2,2′-Dibromobiaryls: Facile Synthesis of Functionalized Phenanthrenes and Dibenzo[<i>g</i>,<i>p</i>]chrysenes