Unsymmetrical indazolyl-pyridinyl-triazole ligand-promoted highly active iridium complexes supported on hydrotalcite and its catalytic application in water
作者:Chenyang Ge、Xinxin Sang、Wei Yao、Liang Zhang、Dawei Wang
DOI:10.1039/c7gc02892j
日期:——
indazolyl-pyridinyl-triazole ligand was synthesized and its iridium complex supported on hydrotalcite was characterized via X-ray power diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray (EDX) spectroscopy and transmission electron microscopy (TEM). This new heterogeneous catalyst bearing the unsymmetrical indazolyl-pyridinyl-triazole ligand exhibits high catalytic activity
A chiral N,N′-dioxide/cobalt(II) complex catalyzed highly diastereoselective and enantioselective tandem aza-Piancatelli rearrangement/intramolecular Diels–Alderreaction has been disclosed. Various valuable hexahydro-2a,5-epoxycyclopenta[cd]isoindoles bearing six contiguous stereocenters have been obtained in good yields with excellent diastereo- and enantio-selectivities from a wide range of both
已公开了一种手性N,N'-二氧化物/钴(II)配合物,催化高度非对映选择性和对映选择性的串联氮杂-Piancatelli重排/分子内狄尔斯-阿尔德反应。从各种现成的2-呋喃基甲醇和N-(呋喃-2)中,以良好的收率获得了具有六个非连续立体中心的高收率的各种有价值的六氢-2 a,5-环氧环戊基[ cd ]异吲哚,并具有六个连续的立体中心。-基甲基)苯胺。
Furfural and 5-(hydroxymethyl)furfural valorization using homogeneous Ni(0) and Ni(II) catalysts by transfer hydrogenation
作者:Tamara Jurado-Vázquez、Alma Arévalo、Juventino J. García
DOI:10.1016/j.jorganchem.2021.122162
日期:2022.1
The complex [dippeNi(COD)] (dippe =1,2-bis(diisopropyl phosphino)ethane) was used as a catalytic precursor in furfural (FF) and 5-(hydroxymethyl)furfural (HMF) valorization, along with formic acid as hydrogen transfer agent, to produce the corresponding alcohol in each case, with excellent yields (≥99%) and under mild conditions (5 h, 120 °C). The air-stable Ni(II)-catalyst precursor, [dippeNiCl2]
复合物 [dippeNi(COD)](dippe = 1,2-双(二异丙基膦基)乙烷)用作糠醛(FF)和 5-(羟甲基)糠醛(HMF)的催化前体,以及甲酸作为氢转移剂,在每种情况下生产相应的醇,在温和条件下(5 小时,120°C)以优异的收率(≥99%)。 空气稳定的 Ni(II) 催化剂前体 [dippeNiCl 2 ] 在 FF 加氢胺化中进行了评估,使用各种苯胺,使用 FA 作为氢源(在 16 小时和 120 °C 下),以生产具有出色的收率和选择性(89 至 >99%)。据我们所知,这是在氢转移协议中使用均相 Ni 催化剂对 FF 进行还原胺化以获得糠胺的第一份报告。
Indium trifluoromethanesulfonate (In(OTf)3). A novel reusable catalyst for intramolecular Diels–Alder reactions
作者:Dipak Prajapati、Dhrubojyoti D Laskar、Jagir S Sandhu
DOI:10.1016/s0040-4039(00)01513-6
日期:2000.10
Indium trifluoromethanesulfonate (In(OTf)(3)) is found to be an effective catalyst for intramolecular Diels-Alder reactions of furans. This novel catalyst, soluble in both aqueous and organic media, is easily recovered from the aqueous layer after the reaction is completed. (C) 2000 Elsevier Science Ltd. All rights reserved.
KLEPO, Z.;JAKOPCIC, K., J. CHEM. ENG. DATA, 1985, 30, 235-237