Boron-chelate assisted synthesis of di[pyrazol-3(5)-yl]methane and 1,1’,2,2’-tetra[pyrazol-3(5)-yl]ethane
摘要:
A boron-chelate assisted methodology was applied to the synthesis of di[pyrazol-3(5)-yl]methane and 1,1',2,2'-tetra[pyrazol-3(5)-yl]ethane from acetylacetone or tetraacetylethane, N,N-dimethylformamide dimethyl acetal and hydrazine hydrate.
Boron-chelate assisted synthesis of di[pyrazol-3(5)-yl]methane and 1,1’,2,2’-tetra[pyrazol-3(5)-yl]ethane
摘要:
A boron-chelate assisted methodology was applied to the synthesis of di[pyrazol-3(5)-yl]methane and 1,1',2,2'-tetra[pyrazol-3(5)-yl]ethane from acetylacetone or tetraacetylethane, N,N-dimethylformamide dimethyl acetal and hydrazine hydrate.
BULKY LIGANDS AND METAL COMPOUNDS COMPRISING BULKY LIGANDS
申请人:Marshak Michael Pesek
公开号:US20170121263A1
公开(公告)日:2017-05-04
This disclosure provides, molecular metal catalysts supported by sterically bulky β-diketonate (acac) ligands. Disclosed herein are bulky β-diketonate ligands, methods of making bulky β-diketonate ligands, and methods of making metal catalysts supported by sterically bulky β-diketonate (acac) ligands.
[EN] BIS(3,4,5-TRINITROPYRAZOLYL)METHANE AND BIS(3,5-DINITRO-4-AMINOPYRAZOLYL)METHANE AS EXPLOSIVES<br/>[FR] BIS(3,4,5-TRINITROPYRAZOLYL)MÉTHANE ET BIS(3,5-DINITRO-4-AMINOPYRAZOLYL)MÉTHANE EN TANT QU'EXPLOSIFS
申请人:UNIV MUENCHEN LUDWIG MAXIMILIANS
公开号:WO2017021029A1
公开(公告)日:2017-02-09
The invention relates to bis(3,4,5-trinitropyrazolyl)methane (UMX1), bis(3,5-dinitro- 4-aminopyrazolyl)methane (UMX2), an energetic active mass comprising at least one of these compounds, a use of at least one of these compounds as well as methods for synthesizing these compounds.
Resin composition, optical filter and plasma display
申请人:Nippon Shokubai Co., Ltd.
公开号:EP1467249A2
公开(公告)日:2004-10-13
A resin composition which can enhance the heat resistance and the humidity resistance of a dye possessing the maximum absorption at wavelengths in the range of 380 - 780 nm is provided. It is obtained by polymerizing a monomer mixture containing 5 - 100 wt. % of a monomer represented by the formula: CH2 = CR - COOX (wherein R denotes a hydrogen atom or a methyl group and X denotes a hydrocarbon group of 4 - 25 carbon atoms) and/or a fluorine atom-containing unsaturated monomer and containing a dye possessing the maximum absorption at wavelengths in the range of 380 - 780 nm in an acryl type resin having an acid value in the range of 0 - 30 mgKOH/g and a hydroxyl value in the range of 0 - 30 mgKOH/g.
BIS(3,4,5-TRINITROPYRAZOLYL)METHANE AND BIS(3,5-DINITRO-4-AMINOPYRAZOLYL)METHANE AS EXPLOSIVES
申请人:Ludwig-Maximilians-Universität München
公开号:EP3124473A1
公开(公告)日:2017-02-01
The invention relates to bis(3,4,5-trinitropyrazolyl)methane (UMX1), bis(3,5-dinitro-4-aminopyrazolyl)methane (UMX2), an energetic active mass comprising at least one of these compounds, a use of at least one of these compounds as well as methods for synthesizing these compounds.
作者:Kidd, Jesse B.、Fiala, Tahoe A.、Swords, Wesley B.、Park, Yerin、Meyer, Kent A.、Sanders, Kyana M.、Guzei, Ilia A.、Wright, John C.、Yoon, Tehshik P.
DOI:10.1021/jacs.4c02975
日期:——
electronic structure of their excited state and divert their reactivity toward alternate photoproducts. We show herein that a triplet rebound strategy enables the stereocontrolled reaction of an excited-state carbonyl compound in its native, unbound state. These studies have resulted in the development of the first highly enantioselective catalytic Paternò–Büchi reaction, catalyzed by a novel hydrogen-bonding
Paternò-Büchi 反应是羰基与烯烃的 [2 + 2] 光环加成反应,得到氧杂环丁烷。然而,这种经典光反应的对映选择性催化已被证明是一个长期存在的挑战。许多最先进的不对称光化学策略并不适合解决这个问题,因为羰基与布朗斯台德或路易斯酸性催化剂的相互作用可以改变其激发态的电子结构并将其反应性转向替代光产物。我们在此表明,三重态回弹策略能够实现激发态羰基化合物在其天然、未结合状态下的立体控制反应。这些研究开发出了第一个高度对映选择性催化 Paternò-Büchi 反应,该反应由新型氢键手性 Ir 光催化剂催化。