Pd-catalysed carbonylative annulation of salicylaldehydes with benzyl chlorides using<i>N</i>-formylsaccharin as a CO surrogate
作者:Vinod K. Yadav、Vishnu P. Srivastava、Lal Dhar S. Yadav
DOI:10.1039/c8nj03173h
日期:——
A highly efficient synthesis of 3-arylcoumarins by Pd-catalysed carbonylative cyclisation of salicylaldehydes with benzyl chlorides usingN-formylsaccharin as a CO source is developed.
以 N-甲酰基糖精为 CO 源,通过 Pd 催化水杨醛与苄基氯的羰基化环化,开发了一种高效合成 3-芳基香豆素的方法。
A Complete Switch of the Directional Selectivity in the Annulation of 2-Hydroxybenzaldehydes with Alkynes
作者:Huiying Zeng、Chao-Jun Li
DOI:10.1002/anie.201407589
日期:2014.12.8
reaction selectivity is an eternal pursuit for chemists working in chemical synthesis. As part of this endeavor, our group has been exploring the possibility of constructing different natural product skeletons from the same simple starting materials by using different catalytic systems. In our previous work, an isoflavanone skeleton was obtained from the annulation of a salicylaldehyde and an alkyne
Synthesis of 3-arylcoumarins through N-heterocyclic carbene catalyzed condensation and annulation of 2-chloro-2-arylacetaldehydes with salicylaldehydes
作者:Yuansong Jiang、Wanzhi Chen、Weimin Lu
DOI:10.1016/j.tet.2013.03.025
日期:2013.5
The condensation reaction of 2-chloro-2-arylacetaldehyde with salicylaldehyde catalyzed by N-heterocyclic carbene (NHC) leading to 3-arylcoumarin was studied. A number of 3-arylcoumarin derivatives were obtained in good to excellent yields via this umpolung reaction. This reaction is facile and experimentally simple and mild.