Nano TiO2-supported Preyssler-type heteropolyacid (nanoTiO2/H14[NaP5W30O110]): an efficient and re-usable catalyst for the one-pot synthesis of N-acetyl-2-aryl-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones
作者:Davood Azarifar、Seyed-Mola Khatami、Mohammad Ali Zolfigol、Davood Sheikh
DOI:10.1007/s13738-013-0242-4
日期:2013.10
loss of its activity. Graphical AbstractAn efficient procedure has been developed for one-potsynthesis of N-acyle-2-aryl-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones in the presence of Preyssler-type heteropolyacid acid modified nano-sized TiO2 as catalyst. The reactions proceed smoothly at 25 °C to afford the products in high yields. The catalyst is easily separated and re-used for the next successive reactions