Synthesis of tetra-substituted olefins via annulation by Pd-catalyzed carbopalladation/C–H activation and solid state fluorescence properties
作者:Kanagaraj Naveen、Avanashiappan Nandakumar、Paramasivan Thirumalai Perumal
DOI:10.1039/c5ra14621f
日期:——
Palladium-catalyzed and norbornene-mediated multiple CâC bond forming strategies to highly substituted helical olefin incorporated 1,2,3,4-tetrahydroisoquinolines have been developed via double carbopalladation/CâH activation of 2-bromo-N-benzylpropargylamines. The scope of the above carbocyclization process has been studied by varying the substitution on starting materials which have been synthesized using A3-coupling (mineâldehydeâlkyne). Interestingly, the synthesized compounds show a pronounced solid state fluorescence property due to their restriction of intramolecular rotation in the condensed phase.
在钯催化和降冰片烯介导下,通过 2-溴-N-苄基丙炔胺的双羰基钯化/羰基氢活化,开发出了多种 CâC 键形成策略,从而生成高度取代的螺旋烯烃结合型 1,2,3,4-四氢异喹啉。通过改变用 A3-偶联(雷醛)合成的起始原料的取代度,研究了上述碳环化过程的范围。有趣的是,由于在凝聚相中限制了分子内旋转,合成的化合物显示出明显的固态荧光特性。