An efficient approach to the cyclotrimerisation of alkynes: solvent-free synthesis of 1,3,5-trisubstituted benzenes using p-toluenesulfonic acid monohydrate
作者:Qi Gao、Fang-ping Bao、Xiao-jing Feng、Yingi-ming Pan、Heng-shan Wang、Dian-peng Li
DOI:10.3998/ark.5550190.0014.305
日期:——
An environmentally friendly, efficient method for transforming alkynes into substituted benzenes catalyzed by p-toluenesulfonicacidmonohydrate ( p-TsOH·H 2O) under solvent-free conditions has been developed, which conforms to the principles of "green" chemistry and overcomes the shortcomings of previous methods for the synthesis of substituted benzenes. The reaction is quite general and provides
The semi-hydrogenation of terminalalkynes is successfully achieved with NaBH4 catalyzed by recyclable palladium nanowires (PdNWs) under ambient conditions. With only 0.32 mol % of catalyst loading, the reaction gives the hydrogenated products with up to 98 % overall yields, in which 97 % are semi-hydrogenated products. The method expands the application of metal nanomaterials in organic syntheses