Microwave-assisted palladium-catalyzed highly regio- and stereoselective head to head dimerization of terminal aryl alkynes in water
作者:Eduardo Buxaderas、Diego A. Alonso、Carmen Nájera
DOI:10.1039/c4ra08287g
日期:——
A highly regio- and stereoselective oxime palladacycle/imidazolinium-catalyzed head to head dimerization of terminal aryl alkynes in water is presented. The reaction, which is carried out at 130 °C under microwave irradiation in the presence of 1,3-bis-(2,6-diisopropylphenyl)imidazolinium chloride as ligand, triethylamine as base, and TBAB as surfactant, allows the synthesis of (E)-1,4-enynes as single
提出了一种高度区域选择性和立体选择性的肟,它在水中被末端芳基炔烃头戴二头二聚化。该反应在1,3-双-(2,6-二异丙基苯基)咪唑啉鎓盐作为配体,三乙胺作为碱和TBAB作为表面活性剂的存在下,在微波辐射下于130°C进行,可以合成(E)-1,4-烯炔为单一立体异构体,分离得率良好。