在筛选的20种非均相和均相催化剂中,Nb 2 O 5通过琥珀酸酐和苯胺的脱水缩合合成N-苯基琥珀酰亚胺的活性最高。Nb 2 O 5用于直接将各种羧酸酐与NH 3或具有各种官能团的胺直接酰亚胺化,可以重复使用。动力学研究表明,路易斯酸Nb 2 O 5催化剂比路易斯酸性氧化物TiO 2和均相路易斯酸ZrCl 4具有更高的耐水性,这通过使用Nb可以提高酰亚胺的收率。2 O 5。
Two-photon absorption decolorizable material, two-photon absorption refractive index modulation material, two-photon absorption polymerization material, two-photon absorption polymerization method and three-dimensional optical recording material
申请人:Takizawa Hiroo
公开号:US20060083890A1
公开(公告)日:2006-04-20
A two-photon absorption decolorizable material comprising: a two-photon absorption dye executing a two-photon absorption; and a decolorizable dye having a molar absorption coefficient equal to or less than 100 at a wavelength of a light irradiated at the two-photon absorption, wherein the decolorizable dye is decolorized by an electron transfer or an energy transfer utilizing an excitation energy obtained by the two-photon absorption of the two-photon absorption dye.
4-Nitrophthalimides. I. Derivatives of Alkyl Halides Giving a Saponification Equivalent<sup>1</sup>
作者:John H. Billman、R. Vincent Cash
DOI:10.1021/ja01106a503
日期:1953.5
WILLIAMS F. J.; DONAHUE P. E., J. ORG. CHEM. <JOCE-AH>, 1978, 43, NO 8, 1608-1610
作者:WILLIAMS F. J.、 DONAHUE P. E.
DOI:——
日期:——
US7582391B2
申请人:——
公开号:US7582391B2
公开(公告)日:2009-09-01
Direct Synthesis of Cyclic Imides from Carboxylic Anhydrides and Amines by Nb<sub>2</sub>
O<sub>5</sub>
as a Water-Tolerant Lewis Acid Catalyst
作者:Md. A. Ali、Sondomoyee K. Moromi、Abeda S. Touchy、Ken-ichi Shimizu
DOI:10.1002/cctc.201501172
日期:2016.3.7
highest activity for the synthesis of N‐phenylsuccinimide by dehydrative condensation of succinicanhydride and aniline. Nb2O5 was used in the direct imidation of a wide range of carboxylic anhydrides with NH3 or amines with various functional groups and could be reused. Kinetic studies showed that the Lewis acid Nb2O5 catalyst was more water tolerant than both the Lewis acidic oxide TiO2 and the homogeneous
在筛选的20种非均相和均相催化剂中,Nb 2 O 5通过琥珀酸酐和苯胺的脱水缩合合成N-苯基琥珀酰亚胺的活性最高。Nb 2 O 5用于直接将各种羧酸酐与NH 3或具有各种官能团的胺直接酰亚胺化,可以重复使用。动力学研究表明,路易斯酸Nb 2 O 5催化剂比路易斯酸性氧化物TiO 2和均相路易斯酸ZrCl 4具有更高的耐水性,这通过使用Nb可以提高酰亚胺的收率。2 O 5。