An efficient and facile ultrasonic-accelerated one-pot synthesis of N-acetyl-2-aryl-1, 2-dihydro-(4H)-3,1-benzoxazin-4-ones
作者:Davood Azarifar、Davood Sheikh
DOI:10.1002/hc.20663
日期:——
An application of ultrasonic irradiation in the one-potsynthesis of N-acetyl-2-aryl-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones from the condensation reaction between aromatic aldehydes and anthranilic acid in the presence of excess amount of acetic anhydride has been explored. The reactions proceed smoothly under mild and solvent-free conditions at room temperature in the absence of any catalyst to afford
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
Ultrasound-accelerated one-pot synthesis of N-acetyl-2-aryl-1,2-dihydro-4H-3,1-benzoxazin-4-ones
作者:D. Azarifar、D. Sheikh
DOI:10.1007/s10593-011-0883-0
日期:2011.12
The one-pot synthesis of N-acetyl-2-aryl-1,2-dihydro-4H-3,1-benzoxazin-4-one derivatives from the condensation reaction of anthranilic acids with heteroaromatic aldehydes in the presence of excess amount of acetic anhydride has been explored. The reactions proceed smoothly under ultrasound irradiation and without catalyst at 35-40 degrees C to afford the title products in high yields.