The multicomponent condensation of an aryl aldehyde,acetyl chloride,acetonitrile,and enolizable ketone as one-pot synthesis of β-acetamido ketones in high yields was investigated using commercial,non-corrosive,and en...The multicomponent condensation of an aryl aldehyde,acetyl chloride,acetonitrile,and enolizable ketone as one-pot synthesis of β-acetamido ketones in high yields was investigated using commercial,non-corrosive,and environmentally benign Keggin and Wells-Dawson heteropolyacid catalysts.The best catalyst was H5PW10V2O40.The methodology used simple experimental conditions,and the short reaction times and high yields indicate it is a useful strategy for the large scale synthesis of β-acetamido ketones.展开更多
研究了在HY型分子筛的超笼结构中原位合成Wells-Dawson型磷钨酸,并作为催化剂用于液相甘油脱水制备丙烯醛反应。通过FTIR、31P MAS NMR表征,证明磷钨酸被成功合成在超笼结构中,避免了采用普通浸渍法制备的磷钨酸/HY催化剂存在的活性组...研究了在HY型分子筛的超笼结构中原位合成Wells-Dawson型磷钨酸,并作为催化剂用于液相甘油脱水制备丙烯醛反应。通过FTIR、31P MAS NMR表征,证明磷钨酸被成功合成在超笼结构中,避免了采用普通浸渍法制备的磷钨酸/HY催化剂存在的活性组分易流失的缺点,催化剂稳定性显著提高。展开更多
The application of tungstophosphoric acid with Wells-Dawson structure and its derivatives has broad prospect due to their strong acidity and oxidisability. There are some isomeric compounds of 2:17 series of tungstoph...The application of tungstophosphoric acid with Wells-Dawson structure and its derivatives has broad prospect due to their strong acidity and oxidisability. There are some isomeric compounds of 2:17 series of tungstophosphates, such as α and β isomers. The β isomer is not stable and is difficult to prepare. So it is rarely reported. This note describes the synthesis and characterization of some new lanthanoid complexes with a formula M<sub>12</sub>H<sub>5</sub> [Ln(β-P<sub>2</sub>W<sub>17</sub>O<sub>61</sub>)<sub>2</sub>·xH<sub>2</sub>O (Ln<sup>3+</sup>=La, Nd, Sm, Eu, Gd, Dy, M=Bu<sub>4</sub>N<sup>+</sup>, x=2;展开更多
基金Partial financial support from the Research Council of Sabzevar Tarbiat Moallem University is greatly appreciated
文摘The multicomponent condensation of an aryl aldehyde,acetyl chloride,acetonitrile,and enolizable ketone as one-pot synthesis of β-acetamido ketones in high yields was investigated using commercial,non-corrosive,and environmentally benign Keggin and Wells-Dawson heteropolyacid catalysts.The best catalyst was H5PW10V2O40.The methodology used simple experimental conditions,and the short reaction times and high yields indicate it is a useful strategy for the large scale synthesis of β-acetamido ketones.
文摘The application of tungstophosphoric acid with Wells-Dawson structure and its derivatives has broad prospect due to their strong acidity and oxidisability. There are some isomeric compounds of 2:17 series of tungstophosphates, such as α and β isomers. The β isomer is not stable and is difficult to prepare. So it is rarely reported. This note describes the synthesis and characterization of some new lanthanoid complexes with a formula M<sub>12</sub>H<sub>5</sub> [Ln(β-P<sub>2</sub>W<sub>17</sub>O<sub>61</sub>)<sub>2</sub>·xH<sub>2</sub>O (Ln<sup>3+</sup>=La, Nd, Sm, Eu, Gd, Dy, M=Bu<sub>4</sub>N<sup>+</sup>, x=2;
