Article
Chemistry, Organic
Margaux Beretta, Emilie Rouchaud, Lionel Nicolas, Jean-Pierre Vors, Thomas Droege, Mazen Es-Sayed, Jean-Marie Beau, Stephanie Norsikian
Summary: The synthesis of glycopyranosyl nucleosides modified in the sugar moiety has been less frequently explored due to the lack of a reliable method to glycosylate pyrimidine bases. This study reports a solution for synthesizing peptidonucleosides by glycosylating different pyrimidine nucleobases with glucopyranosyl donors carrying an azide group. A methodological study showed that using a sulfoxide donor in combination with trimethylsilyl triflate as the promoter led to the best yields.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Itaru Nakamura, Ichiro Muranushi, Takato Asoh, Masahiro Terada
Summary: Silver-catalyzed reactions of N-sulfenylanilides give good to high yields of p-sulfenylanilides with good para selectivity. The transformation is compatible with functional groups such as ester, bromo, and iodo groups. Mechanistic studies reveal that the rearrangement reaction proceeds through intermolecular transfer of the sulfenyl group.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Organic
Haruka Kano, Kyohei Matsuo, Hironobu Hayashi, Kosaku Kato, Akira Yamakata, Hiroko Yamada, Naoki Aratani
Summary: The study successfully synthesized C-60-xanthlium, X60_NTf2, with fullerene as an electron donor and xanthlium as an electron acceptor. Experimental results showed photo-induced intramolecular electron transfer from the singlet excited state of C-60 to xanthlium. Additionally, electrochemical measurements and DFT calculations supported the acceptor ability of xanthene moiety in X60_NTf2. This model compound is useful for investigating properties of transiently generated fullerene radical cations.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Siai Zhou, Jiaming Ao, Aoxin Guo, Xiaoya Zhao, Nan Deng, Guoqing Wang, Qixuan Yang, Akihiro Ishiwata, Xue-Wei Liu, Qianqian Li, Hui Cai, Feiqing Ding
Summary: A versatile ZnI2-directed fi-galactosylation approach using a 4,6-O-tethered and 2-O-Bn galactosyl donor is reported for the stereoselective and efficient synthesis of fi-O-galactosides. The reaction tolerates a wide range of functional groups and complex molecular architectures, providing stereocontrolled fi-galactosides in moderate to excellent yields. The practicality of this transformation is demonstrated through the synthesis of a tetrasaccharide arabinogalactan fragment with high stereoselectivity.
Article
Chemistry, Multidisciplinary
Thomas Hansen, Tim P. Ofman, Joey G. C. Vlaming, Ivan A. Gagarinov, Jessey van Beek, Tessa A. Gote, Jacoba M. Tichem, Gijs Ruijgrok, Herman S. Overkleeft, Dmitri V. Filippov, Gijsbert A. van der Marel, Jeroen D. C. Codee
Summary: By systematically studying the reactivity-stereoselectivity relationships of caryophyllose donor and acceptor glycosides, using experimental and computational techniques, we were able to design carbohydrate building blocks with the necessary properties to assemble mycobacterial lipooligosaccharide fragments of M. marinum.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
William P. Gallagher, John R. Coombs, Carlos A. Guerrero, Eric M. Simmons, Francisco Gonzalez-Bobes
Summary: We have developed a six-step synthesis for the tricyclic core 10 of BMS-986251, which involves the installation of a perfluoro isopropyl group through a radical mechanism and a novel diastereoselective annulation to form the pyrrolidine ring. Using this new route, compound 10 was obtained as a single stereoisomer in 499'6 yield after 6 steps and 3 isolations.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
Article
Engineering, Environmental
Hao Gu, Hualin Xiong, Hongwei Yang, Guangbin Cheng
Summary: A series of new nitrogen-rich compounds were synthesized, with energetic salt 8 being a unique zwitterionic salt. These compounds exhibit good thermal stability and combustion performance, showing potential as novel gas generants.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Sayan Mukherjee, Animesh Pramanik
Summary: A NCS-mediated methodology has been developed for rapid sulfenylation of enaminones of L-alpha-amino esters and aryl/alkyl amines at room temperature, producing a library of biologically important sulfenyl enaminones in good-to-excellent yields. This pathway generates sulfenyl chloride as an intermediate which leads to rapid sulfenylation of enaminones through cross-dehydrogenative coupling (CDC) under mild reaction conditions.
Article
Biochemistry & Molecular Biology
Jun Sato, Hiroki Kusano, Toshiaki Aoki, Satoru Shibuya, Katsuki Yokoo, Kazuo Komano, Takuya Oguma, Shuhei Matsumoto, Takafumi Sato, Kazuya Yasuo, Kenji Yamawaki
Summary: A series of tricyclic beta-lactams were synthesized and evaluated for antibacterial activities against carbapenem-resistant Enterobacterales (CBEs). Introducing sulfoxide resulted in potent antibacterial activities and strong therapeutic efficacy in a neutropenic mouse lung infection model. The tricyclic beta-lactam skeleton may serve as a promising scaffold for new antibacterial agents against CREs.
BIOORGANIC & MEDICINAL CHEMISTRY
(2021)
Article
Cell Biology
Anika Mijakovac, Azra Frkatovic, Maja Hanic, Jelena Ivok, Marina Martinic Kavur, Maja Pucic-Bakovic, Tim Spector, Vlatka Zoldos, Massimo Mangino, Gordan Lauc
Summary: Through genetic analysis of the TwinsUK female cohorts, we found that genetic factors have a moderate contribution to the variation of the glycan clock, while unique environmental factors have a minor role and shared environmental factors have a larger contribution. The estimates of genetic factors and unique environmental factors increased when age was included as a covariate.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2022)
Article
Chemistry, Organic
Intzar Ali, M. V. Kamala Lakshmi, Ramu Sridhar Perali
Summary: The Mislow-Evans rearrangement was utilized to construct digitoxose-derived glycals used in the synthesis of cardenolides digitoxin, digoxin, and gitoxin. The scalability of the trisaccharide synthesis was demonstrated by performing reactions on a multigram scale. Glycosylation reactions between the synthesized digoxin glycal donor and aglycons digoxigenin and gitoxigenin yielded novel cardenolide derivatives.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yingle Feng, Jie Yang, Chenglin Cai, Taotao Sun, Qi Zhang, Yonghai Chai
Summary: An efficient and highly stereoselective catalytic protocol for the construction of beta-mannosides has been developed. The glycosylation reaction of 2,6-lactone-bridged mannopyranosyl ortho-hexynylbenzoate with various acceptors proceeded smoothly at room temperature in the presence of 5% Hg(II), resulting in high yield and exclusive beta-stereoselectivity of the desired beta-mannosides.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Organic
Vasily D. Sen, Valery A. Golubev, Gennadii Shilov, Alexander Chernyak, Vladimir A. Kurmaz, Victor B. Luzhkov
Summary: The reaction between six- and five-membered oxoammonium salts and DMSO shows selective transfer of the O atom and formation of hydrolytically unstable iminium salts. Kinetic data and DFT calculations suggest a mechanism involving a charge-transfer complex leading to the formation of iminium salts. Analysis of products and computations rule out an alternative mechanism with discrete nitrenium cations.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Kesatebrhan Haile Asressu, Chun-Wei Chang, Sarah Lam, Cheng-Chung Wang
Summary: Efforts to efficiently prepare sialosides have faced challenges in controlling the stereochemical outcome of sialylation reactions due to the unique chemical structure of sialic acid. A new strategy using Relative Reactivity Values (RRV) was developed to analyze six types of p-tolyl thiosialosides in sialylation reactions, revealing a correlation between alpha/beta stereoselectivity, yields, and intermediate changes with donor reactivity. These findings offer insights for tailoring suitable building blocks for stereo-controlled sialylation reactions.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Cody Loy, Jana M. Holthoff, Robert Weiss, Stefan M. Huber, Sergiy V. Rosokha
Summary: Halogen-bonded complexes between halide anions and a cyclopropenylium-based anionic XB donor were characterized in solution for the first time, showing that halogen bonding is strong enough to overcome electrostatic repulsion. The formation constants of these complexes are comparable to others, but their UV-Vis spectra are determined by the electronic excitations within the XB donor.
Article
Chemistry, Analytical
Hiroaki Okabe, Shu-Ping Hui, Hirotoshi Fuda, Takayuki Furukawa, Seiji Takeda, Rojeet Shrestha, Yusuke Miura, Mitsugu Watanabe, Hitoshi Chiba
ANALYTICAL SCIENCES
(2015)
Article
Chemistry, Multidisciplinary
Philip O. Adero, Takayuki Furukawa, Min Huang, Debaraj Mukherjee, Pascal Retailleau, Luis Bohe, David Crich
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2015)
Article
Biochemistry & Molecular Biology
Takayuki Furukawa, Hirotoshi Fuda, Satoshi Miyanaga, Chinatsu Watanabe, Hitoshi Chiba, Shu-Ping Hui
CHEMISTRY AND PHYSICS OF LIPIDS
(2016)
Article
Biochemistry & Molecular Biology
Yusuke Miura, Takayuki Furukaw, Miho Kobayashi, Rojeet Shrestha, Ryoji Takahashi, Chikara Shimizu, Hitoshi Chiba, Shu-Ping Hui
Article
Biochemistry & Molecular Biology
Takayuki Furukawa, Misaki Arai, Fayna Garcia-Martin, Maho Amano, Hiroshi Hinou, Shin-Ichiro Nishimura
GLYCOCONJUGATE JOURNAL
(2013)
Article
Biotechnology & Applied Microbiology
Neil P. J. Price, Takayuki Furukawa, Fang Cheng, Jianzhao Qi, Wenqing Chen, David Crich
JOURNAL OF ANTIBIOTICS
(2014)
Article
Chemistry, Multidisciplinary
Myriame Moume-Pymbock, Takayuki Furukawa, Sujit Mondal, David Crich
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2013)
Article
Chemistry, Organic
Takayuki Furukawa, Hiroshi Hinou, Shin-Ichiro Nishimura
Article
Chemistry, Organic
Takayuki Furukawa, Hiroshi Hinou, Ken Shimawaki, Shin-Ichiro Nishimura
TETRAHEDRON LETTERS
(2011)