在非均相催化剂上高选择性合成伯胺仍然是化学工业的挑战。负载在Nb 2 O 5上的钌纳米颗粒可作为高度选择性和可重复使用的非均相催化剂,用于各种含还原敏感官能团(如杂环和卤素)的NH 3和H 2的羰基化合物的低温还原胺化反应,并防止形成仲胺和不希望的氢化副产物。这些材料的选择性催化很可能归因于Nb 2 O 5上Ru粒子的弱供电子能力表面。该催化剂和均相Ru体系的组合用于从5-(羟甲基)糠醛合成亚胺副产物的复杂混合物而由芳族5-羟甲基糠醛合成2,5-双(氨基甲基)呋喃。
Selective catalysis for the reductive amination of furfural toward furfurylamine by graphene-co-shelled cobalt nanoparticles
作者:Xiuzheng Zhuang、Jianguo Liu、Shurong Zhong、Longlong Ma
DOI:10.1039/d1gc03578a
日期:——
the –NH2 moiety towardfunctionalized and structurally diverse molecules, even under very mild industrially viable and scalable conditions. Overall, this newly developed catalyst introduces the synthesis of amines from biomass-derived platforms with satisfactory selectivity and carbon balance, providing cost-effective and sustainable access to the wide applications of reductive amination.
Furfurylamine converted from biomass-based platform molecules furfural was proven a significant intermediate in the synthesis of different valuable compounds. The combination of Ruthenium with HZSM-5 was acted as an excellent selective and reusable catalyst for the reductionamination of furfural with environmentally friendly ammonia and hydrogen. Incorporation of Ru species into HZSM-5 had a significant
Novel compound for color-producing composition, and recording material
申请人:——
公开号:US20010044553A1
公开(公告)日:2001-11-22
A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula:
10≧(
A+B
)≧3
wherein each of A and B is an integer of 1 or more.
NOVEL COMPOUND FOR COLOR-PRODUCING COMPOSITION, AND RECORDING MATERIAL
申请人:KABASHIMA Kazuo
公开号:US20100105941A1
公开(公告)日:2010-04-29
A urea-urethane compound having one or more urea groups and one or more urethane groups in the molecular structure, the number of said urea groups (A) and the number of said urethane groups (B) satisfying the following numerical formula:
10≧(
A+B
)≧3
wherein each of A and B is an integer of 1 or more.
Diazonium salt for thermosensitive recording medium
申请人:Oki Electric Industry Co., Ltd.
公开号:EP0816914A2
公开(公告)日:1998-01-07
A diazonium salt for a color-forming layer of a thermosensitive recording medium. This diazonium salt has the following formula (1) or (2)
wherein R is an alkyl group having two or more carbon atoms such as t-butyl or sec-butyl, and X- is selected from the group consisting of hexafluorophosphate ion PF6-, tetrafluoroborate ion BF4- and tetraphenylborate ion (C6H5)4B-.
where R1 and R2 are alkyl groups each having one or more carbon atoms, and X- is selected from the group consisting of hexafluorophosphate ion PF6-, tetrafluoroborate ion BF4- and tetraphenylborate ion (C6H5)4B-.