A catalytic approach of synthesizing the -selective saturated carbo- and heterocyclic germanium compounds (3D framework) is reported the hydrogenation of readily accessible aromatic germanes (2D framework). Among the numerous catalysts tested, Nishimura's catalyst (RhO/PtO·HO) exhibited the best hydrogenation reactivity with an isolated yield of up to 96%. A broad range of substrates including the synthesis of unprecedented saturated heterocyclic germanes was explored. This selective hydrogenation strategy could tolerate several functional groups such as -CF, -OR, -F, -Bpin, and -SiR groups. The synthesized products demonstrated the applications in coupling reactions including the newly developed strategy of aza-Giese-type addition reaction (C-N bond formation) from the saturated cyclic germane product. These versatile motifs can have a substantial value in organic synthesis and medicinal chemistry as they show orthogonal reactivity in coupling reactions while competing with other coupling partners such as boranes or silanes, acquiring a three-dimensional structure with high stability and robustness.
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http://dx.doi.org/10.1021/jacs.2c12062 | DOI Listing |
ChemSusChem
January 2025
A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky av. 29, Moscow, 119991, Russian Federation.
Spirocyclic alkyl amino carbene (SCAAC) Ru complexes demonstrate outstanding activity and selectivity in ethenolysis of methyl oleate (MO) or fatty acid methyl esters (FAMEs), and 5,6-dimethoxyindane derivative was the most active catalyst to date. For the further catalyst design, we proposed modifying the spirocyclic fragment by fusion of saturated carbo- or heterocycle, linked to the 5,6-positions of indane or 6,7- positions of tetralin. Another suggested way of the modification of SCAAC complex was the insertion of chromane fragment to the carbene ligand.
View Article and Find Full Text PDFEur J Med Chem
February 2024
Department of Chemistry, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, NO-7491, Trondheim, Norway. Electronic address:
The colony-stimulating factor 1 receptor (CSF1R) is an attractive target for inflammation disorders and cancers. Based on a series of pyrrolo[2,3-d]pyrimidine containing two carbo-aromatic rings, we have searched for new CSF1R inhibitors having a higher fraction of sp-atoms. The phenyl unit in the 4-amino group could efficiently be replaced by tetrahydropyran (THP) retaining inhibitor potency.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
March 2023
Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany.
The title compounds, CHNOS (), CHNOS (), and CHNOS (), form a homologous series in which the size of the saturated ring increases from six- to eight-membered (with four, five and six methyl-ene groups respectively). For and , the central (CH) moieties are all displaced to the same side of their ring, and the CH-CH-CH angles are much wider than the standard value; a database search indicates that these are general features of such ring systems. For , the thio-phene ring lies with the sulfur atom on the opposite side of the C-C bond to the cyano group, in contrast to and .
View Article and Find Full Text PDFJ Am Chem Soc
February 2023
Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149 Münster, Germany.
Indian Pediatr
March 2023
Department of Pediatrics, Maulana Azad Medical College, New Delhi.
Objective: To estimate the carbohydrate, energy, fat, protein, and sodium content of commonly consumed junk food items and to compare these to the Recommended Dietary Allowance (RDA) and Estimated Average Requirements (EAR) of children.
Methods: A list of eight common junk food categories was made, and the median nutritional content of carbohydrate, energy, fat, protein and sodium was determined from the commonly consumed brands in these categories. It was compared to the RDA and EAR for two different age groups viz.
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