38385-67-0Relevant academic research and scientific papers
Catalytic enantioselective desymmetrization of cyclobutane-1,3diones by carbonyl-amine condensation
Wen, Kai-Ge,Liu, Chao,Wei, Dong-Hui,Niu, Yan-Fei,Peng, Yi-Yuan,Zeng, Xing-Ping
supporting information, p. 1118 - 1122 (2021/02/16)
A chiral phosphoric acid-catalyzed enantioselective condensation of 2,2-disubstituted cyclobutane-1,3-diones with a primary amine is described. This reaction offered a mild and efficient protocol for constructing quaternary carbon-containing cyclobutanes
Forming All-Carbon Quaternary Stereocenters by Organocatalytic Aminomethylation: Concise Access to β2,2-Amino Acids
Shao, Ying,Sun, Jiangtao,Tang, Shengbiao,Wang, Kai,Yu, Jianliang
supporting information, p. 23516 - 23520 (2020/10/21)
The asymmetric synthesis of β2,2-amino acids remains a formidable challenge in organic synthesis. Here a novel organocatalytic enantioselective aminomethylation of ketenes with stable and readily available N,O-acetals is reported, providing β2,2-amino esters bearing an all-carbon quaternary stereogenic center in high enantiomeric ratios with a catalytic amount of chiral phosphoric acid. Typically, this transformation probably proceeds through an asymmetric counter-anion-directed catalysis. As a result, a concise, practical, and atom-economic protocol toward rapidly access to β2,2-amino acids has been developed.
Selective Inhibitors of a Human Prolyl Hydroxylase (OGFOD1) Involved in Ribosomal Decoding
Thinnes, Cyrille C.,Lohans, Christopher T.,Abboud, Martine I.,Yeh, Tzu-Lan,Tumber, Anthony,Nowak, Rados?aw P.,Attwood, Martin,Cockman, Matthew E.,Oppermann, Udo,Loenarz, Christoph,Schofield, Christopher J.
supporting information, p. 2019 - 2024 (2019/01/11)
Human prolyl hydroxylases are involved in the modification of transcription factors, procollagen, and ribosomal proteins, and are current medicinal chemistry targets. To date, there are few reports on inhibitors selective for the different types of prolyl hydroxylases. We report a structurally informed template-based strategy for the development of inhibitors selective for the human ribosomal prolyl hydroxylase OGFOD1. These inhibitors did not target the other human oxygenases tested, including the structurally similar hypoxia-inducible transcription factor prolyl hydroxylase, PHD2.
2-Amino-5,6-difluorophenyl-1 H-pyrazole-Directed PdII Catalysis: Arylation of Unactivated β-C(sp3)-H Bonds
Yang, Jinyue,Fu, Xiaopan,Tang, Shibiao,Deng, Kezuan,Zhang, Lili,Yang, Xianjin,Ji, Yafei
, p. 10221 - 10236 (2019/08/20)
Palladium-catalyzed arylation of unactivated β-C(sp3)-H bonds in carboxylic acid derivatives with aryl iodides is described for the first time using 2-amino-5,6-difluorophenyl-1H-pyrazole as an efficient and readily removable directing group. Two fluoro groups are installed at the 5- and 6-position of the anilino moiety in 2-aminophenyl-1H-pyrazole, clearly enhancing the directing ability of the auxiliary. In addition, the protocol employs Cu(OAc)2/Ag3PO4 (1.2/0.3) as additives, evidently reducing the stoichiometric amount of expensive silver salts. Furthermore, this process exhibits high β-site selectivity, compatibility with diverse substrates containing α-hydrogen atoms, and excellent functional group tolerance.
Palladium-Catalyzed Carbon Isotope Exchange on Aliphatic and Benzoic Acid Chlorides
Gauthier, Donald R.,Rivera, Nelo R.,Yang, Haifeng,Schultz, Danielle M.,Shultz, C. Scott
supporting information, p. 15596 - 15600 (2018/11/23)
An operationally simple protocol for a palladium-catalyzed 13CO and 14CO exchange with activated aliphatic and benzoic carbonyls is presented. Several 13C and 14C building blocks, natural product derivatives, an
Preparation method for indanone compound
-
, (2018/08/28)
The invention especially relates to a preparation method for an indanone compound, belonging to the field of organic synthesis. The preparation method for the indanone compounds comprises the following steps: 1) subjecting a compound as shown in a formula I and a compound as shown in a formula II to a condensation reaction so as to prepare a compound as shown in a formula III; 2) subjecting the compound as shown in the formula III to hydrolysis in the presence of alkali so as to prepare a compound as shown in a formula IV; and 3) carrying out acylation and ring closure on the compound as shownin the formula IV so as to prepare the as shown in a formula V. Compared with the prior art, the preparation method for the indanone compound in the invention has the advantages of low raw material cost, simple operation, low production of waste water, waste gas and industrial residues, high yield and the like, and is more suitable for industrial production; and compared with various traditionalpreparation methods for the indanone compound, the preparation method of the invention has obvious advantages and shows good industrialization prospects.
Ligand-Enabled Alkynylation of C(sp3)?H Bonds with Palladium(II) Catalysts
Fu, Haiyan,Shen, Peng-Xiang,He, Jian,Zhang, Fanglin,Li, Suhua,Wang, Peng,Liu, Tao,Yu, Jin-Quan
supporting information, p. 1873 - 1876 (2017/02/05)
The palladium(II)-catalyzed β- and γ-alkynylation of amide C(sp3)?H bonds is enabled by pyridine-based ligands. This alkynylation reaction is compatible with substrates containing α-tertiary or α-quaternary carbon centers. The β-methylene C(sp
3-Phenylalkyl-2H-chromenes and -chromans as novel rhinovirus infection inhibitors
Conti, Cinzia,Proietti Monaco, Luca,Desideri, Nicoletta
, p. 2074 - 2083 (2017/03/23)
Following our studies on structure-activity relationships of anti-rhinovirus chromene and chroman derivatives, we designed and synthesized new series of 3-phenylalkyl-2H-chromenes and -chromans bearing differently sized, aliphatic linker chains between the two cycles. The cytotoxicity and the antiviral activity of the new compounds on human rhinovirus (HRV) serotype 1B and 14 infection were evaluated in HeLa cell cultures. Most of the tested compounds interfered with HRV1B multiplication in the micromolar or submicromolar concentrations while HRV14 was less susceptible. 3-[3-(4-Chlorophenyl)propyl]chroman (9c) was selected for preliminary mechanism of action studies due to its potent activity against both serotypes (IC50 of 0.48?μM and 1.36?μM towards HRV1B and 14, respectively) coupled with high selectivity (SI?=?206.18 and 73.26, respectively). Results of time of addition/removal studies suggest that 9c, similarly to related derivatives, behaves as a capsid binder interfering with some early events of the HRV1B infectious cycle.
Photoinduced, Copper-Catalyzed Decarboxylative C-N Coupling to Generate Protected Amines: An Alternative to the Curtius Rearrangement
Zhao, Wei,Wurz, Ryan P.,Peters, Jonas C.,Fu, Gregory C.
supporting information, p. 12153 - 12156 (2017/09/12)
The Curtius rearrangement is a classic, powerful method for converting carboxylic acids into protected amines, but its widespread use is impeded by safety issues (the need to handle azides). We have developed an alternative to the Curtius rearrangement that employs a copper catalyst in combination with blue-LED irradiation to achieve the decarboxylative coupling of aliphatic carboxylic acid derivatives (specifically, readily available N-hydroxyphthalimide esters) to afford protected amines under mild conditions. This C-N bond-forming process is compatible with a wide array of functional groups, including an alcohol, aldehyde, epoxide, indole, nitroalkane, and sulfide. Control reactions and mechanistic studies are consistent with the hypothesis that copper species are engaged in both the photochemistry and the key bond-forming step, which occurs through out-of-cage coupling of an alkyl radical.
Unactivated C(sp3)-H hydroxylation through palladium catalysis with H2O as the oxygen source
Hu, Jiantao,Lan, Tianlong,Sun, Yihua,Chen, Hui,Yao, Jiannian,Rao, Yu
supporting information, p. 14929 - 14932 (2015/10/06)
A novel palladium catalyzed hydroxylation of unactivated aliphatic C(sp3)-H bonds was successfully developed. Different from conventional methods, water serves as the hydroxyl group source in the reaction. This new reaction demonstrates good reactivity and broad functional group tolerance. The C-H hydroxylated products can be readily transformed into various highly valuable chemicals via known transformations. Based on experimental and theoretical studies, a mechanism involving the Pd(ii)/(iv) pathway is proposed for this hydroxylation reaction.
