17508-50-8Relevant articles and documents
Chiral imine-containing quinoline oxazoline compound and metal complex thereof as well as preparation method and application
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Paragraph 0143-0149, (2022/01/12)
The invention discloses a chiral imine-containing quinoline oxazoline compound which is high in optical purity and has a structural formula as shown in a formula (1), and discloses a preparation method of the chiral imine-containing quinoline oxazoline compound. The invention also discloses a metal complex obtained by complexing the chiral imine-containing quinoline oxazoline compound and a transition metal salt, wherein the metal complex is shown as a formula (6). The synthetic route is efficient, and the total yield of two steps can reach 85%. The metal complex of the chiral imine-containing quinoline oxazoline compound can be used as a catalyst to catalyze hydrosilylation or hydroboration on a carbon-carbon or carbon heteroatom double bond, and is especially suitable for preparing chiral organic compounds with high regioselectivity and optical selectivity.
Deposition of highly dispersed gold nanoparticles onto metal phosphates by deposition-precipitation with aqueous ammonia
Kamata, Keigo,Miura, Hiroki,Nishio, Hidenori,Shishido, Tetsuya
, p. 7141 - 7150 (2021/11/17)
An efficient method for depositing gold nanoparticles onto metal phosphate has been developed. Deposition-precipitation with aqueous ammonia enabled small gold nanoparticles to be deposited onto a series of metal phosphates with high dispersity and density. A detailed investigation of the mechanism of the formation of gold nanoparticles corroborated that strong interaction between a gold-ammine complex formed by the treatment of HAuCl4 with ammonia and positively-charged metal phosphates was responsible for the formation of highly dispersed gold nanoparticles. Furthermore, the thus-prepared gold catalysts supported on metal phosphates showed higher catalytic activity than those supported on metal oxides for the hydroamination of terminal alkynes. This journal is
Cu/Ni-doped sulfated zirconium oxide immobilized on CdFe2O4 NPs: a cheap, sustainable and magnetically recyclable inorgano-catalyst for the efficient preparation of α-aminonitriles in aqueous media
Nasseri, Mohammad Ali,Ramezani-Moghadam, Simin,Kazemnejadi, Milad,Allahresani, Ali
, p. 4233 - 4256 (2020/07/08)
Abstract: A new multifunctional bimetallic nanocatalyst was prepared by immobilization of Cu/Ni-doped sulfated zirconium oxide on magnetic cadmium ferrite (CdFe2O4@SiO2@ZrO2/SO42?/Cu/Ni) and used as an efficient recyclable catalyst for one-pot as well as stepwise preparation of α-aminonitriles under mild conditions. The magnetic nanocatalyst was characterized by FTIR, TGA, VSM, XRD, EDX, FE-SEM, and TEM analyses. Also, the surface acidity of the catalyst was measured by pyridine adsorption assay. The catalyst possesses various active sites which could catalyst a variety of aromatic and aliphatic aldehydes to the corresponding α-amionitriles under moderate to high yields in the presence of aniline. Furthermore, transformation of ketones to the desired α-amionitriles and some bis-aminonitriles was also performed by this method. The catalyst could be readily recovered from the reaction mixture and reused for several times without significant loss of activity. Graphic abstract: A general and efficient method has been developed for transformation of a variety of aliphatic, aromatic aldehydes and ketones to the corresponding α-aminonitriles using a multifunctional recyclable CdFe2O4@SiO2@ZrO2/SO42?/Cu/Ni nanocatalyst.[Figure not available: see fulltext.]