Nano TiO2-supported Preyssler-type heteropolyacid (nanoTiO(2)/H-14[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：Azarifar Davood^*; Khatami Seyed Mola; Zolfigol Mohammad Ali; Sheikh Davood

来源：Journal of the Iranian Chemical Society, 2013, 10(5): 1039-1046.

DOI：10.1007/s13738-013-0242-4

• Preyssler-type heteropolyacid
• Nano-TiO2
• N-acetyl-2-aryl-1,2-dihydro-(4H)-3,1-benzoxazin-4-one
• Heterogeneous catalyst

An efficient procedure has been developed for one-pot synthesis 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 A degrees C to afford the products in high yields. The catalyst is easily separated and re-used for the next successive reactions without significant loss of its activity.
An efficient procedure has been developed for one-pot synthesis 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 A degrees C to afford the products in high yields. The catalyst is easily separated and re-used for the next successive reactions without significant loss of its activity.

• 出版日期2013-10