Unnatural α-Amino Acid Synthesized through α-Alkylation of Glycine Derivatives by Diacyl Peroxides
作者:Hao Tian、Wentao Xu、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.0c01574
日期:2020.7.2
We have developed a protocol for catalyst- and additive-free α-alkylationreactions of glycine derivatives with diacyl peroxides, which proceed by a pathway involving addition of alkyl radicals to imine intermediates. The diacyl peroxide substrate acts as both alkylation agent and oxidizing agent, which means it is atom-economical. It was applied to various glycine derivatives, dipeptides, and a 3
Towards targeting anticancer drugs: ruthenium(<scp>ii</scp>)–arene complexes with biologically active naphthoquinone-derived ligand systems
作者:Mario Kubanik、Wolfgang Kandioller、Kunwoo Kim、Robert F. Anderson、Erik Klapproth、Michael A. Jakupec、Alexander Roller、Tilo Söhnel、Bernhard K. Keppler、Christian G. Hartinger
DOI:10.1039/c6dt01110a
日期:——
2-hydroxy-[1,4]-naphthoquinone-derived ligands and their coordination to a RuII(η6-p-cymene)Cl moiety. The synthesis of oxime derivatives resulted in the surprising formation of nitroso-naphthalene complexes, as confirmed by X-ray diffraction analysis. The compounds were shown to be stable in aqueous solution but reacted with glutathione and ascorbic acid rather than undergoing reduction. One-electron reduction
The invention pertains to a method for making a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in the presence of at least one cyclic fluorocompound of the following formula (I):
wherein X
1
, X
2
, X
3
, equal or different from each other are independently selected among H, F, and C
1-6
(per)fluoroalkyl groups, optionally comprising one or more catenary or non-catenary oxygen atoms; L represents a bond or a divalent group; R
F
is a divalent fluorinated C
1-3
bridging group; Y is a hydrophilic function selected among anionic functionalities, cationic functionalities and non-ionic functionalities.
Radical alkylation of C(sp<sup>3</sup>)–H bonds with diacyl peroxides under catalyst-free conditions
作者:Hao Tian、Wentao Xu、Yuxiu Liu、Qingmin Wang
DOI:10.1039/c9cc08056b
日期:——
Herein, we describe a protocol for alkylation reactions of C(sp3)–H bonds with diacylperoxides by means of a process involving cross-coupling between an alkyl radical and an α-aminoalkyl radical. The mild, catalyst- and additive-free conditions make this protocol superior to previously reported C(sp3)–H alkylation strategies. The protocol was applied to 1,2,3,4-tetrahydroisoquinolines and a tetrahydro-β-carboline
Novel proton type beta zeolite, preparation method thereof and process for preparing phenol compound using the same
申请人:UBE INDUSTRIES, LTD.
公开号:US20040242938A1
公开(公告)日:2004-12-02
Disclosed are a proton type &bgr; zeolite in which an acid site showing a desorption peak with a range of ±100° C. with a center of 330° C. exists in a spectrum measured by the ammonia temperature programmed desorption method (NH
3
-TPD), and an amount of a strong acid site showing a desorption peak of 500° C. or higher is controlled to 2.5 &mgr;mol/g or less, a method for preparing the same, and a process for preparing a phenol compound by oxidizing a benzene compound with a peroxide in the presence of the proton type &bgr; zeolite.