以下工作介绍了三种通用方法,这是首次允许合成包含两个相同杂原子(即氧OOC,氮NNC或硫SSC)的5,10-二杂苯并二烯衍生物。所描述的两种途径涉及相应的三烯2的光环化,这是导致七环芳族体系的关键步骤。第三种方法基于茚三酮14与苯并[ b ]杂油15之间的酸性缩合。还介绍了5,10-二杂甲苯烯核的典型官能化。此外,本文讨论了三种建议的途径来接收特定的5,10-二杂间苯二酚衍生物的优点和局限性,因为到目前为止尚不适合用于获得具有任何类型杂原子分子的通用方法。
Mild and General Conditions for Negishi Cross-Coupling Enabled by the Use of Palladacycle Precatalysts
作者:Yang Yang、Nathan J. Oldenhuis、Stephen L. Buchwald
DOI:10.1002/anie.201207750
日期:2013.1.7
A wide range of biaryls were synthesized by palladium‐catalyzed Negishi cross‐couplings at ambient temperature or with low catalyst loading. This protocol features the use of a recently reported aminobiphenyl palladacycleprecatalyst to generate the catalytically active XPhosPd0 species. Significantly, a wide range of challenging heterocyclic and polyfluorinated aromatic substrates can be employed
A trisulfur radical anion (S3.−) triggered domino thienannulation strategy for the synthesis of dibenzo[d,d′]thieno[2,3-b;4,5-b′]dithiophenes (DBTDTs) has been developed. This domino protocol is featured by no metal catalyst and the formation of six C−S and one C−C bonds in one-pot reaction. A plausible mechanism has been proposed by control experiments, intermediate trapping experiments, etc. The
开发了一种三硫自由基阴离子(S 3 .− )触发的多米诺噻吩环化策略,用于合成二苯并[ d,d' ]噻吩并[2,3- b ;4,5- b ']二噻吩(DBTDT)。该多米诺骨牌协议的特点是无需金属催化剂,在一锅反应中形成六个 C−S 和一个 C−C 键。通过控制实验、中间捕获实验等提出了一种合理的机制。DBTDT独特的不对称结构赋予其人字形堆积结构和分子间弱的S⋅⋅⋅S相互作用以及高转移积分,从而实现高载流子有机场效应晶体管的迁移率为1.52 cm 2 V -1 s -1 。
Fries; Hemmecke, Justus Liebigs Annalen der Chemie, 1929, vol. 470, p. 17
作者:Fries、Hemmecke
DOI:——
日期:——
Pandya et al., Journal Of Scientific and Industrial Research, 1959, vol. 18 B, p. 198,200