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71.
Dr. Sabrina Giofrè Letizia Molteni Prof. Egle M. Beccalli 《European journal of organic chemistry》2023,26(2):e202200976
This Review summarizes the advances in the catalytic enantioselective mono- and difunctionalization of alkenes, highlighting the fundamental role of ligands. Several types of asymmetric reactions have been developed involving different bonds formation, C−O, C−N and C−C, highlighting the urgency to go ahead in the search for new ligands and synthetic methodologies in order to improve the control over the reaction selectivity and activity and thus, to increase the applications in the synthesis of heterocyclic scaffolds and biologically active compounds. The Review is organized into paragraphs, which discuss the type of bond formed during the nucleopalladation, C−O, C−N, C−C bonds, and the type of reaction involved. 相似文献
72.
Armstrong DS Arvieux J Asaturyan R Averett T Bailey SL Batigne G Beck DH Beise EJ Benesch J Bimbot L Birchall J Biselli A Bosted P Boukobza E Breuer H Carlini R Carr R Chant N Chao YC Chattopadhyay S Clark R Covrig S Cowley A Dale D Davis C Falk W Finn JM Forest T Franklin G Furget C Gaskell D Grames J Griffioen KA Grimm K Guillon B Guler H Hannelius L Hasty R Allen AH Horn T Johnston K Jones M Kammel P Kazimi R King PM Kolarkar A Korkmaz E Korsch W Kox S Kuhn J Lachniet J Lee L Lenoble J 《Physical review letters》2007,99(9):092301
73.
74.
Egle M. Beccalli Alessandro Marchesini B. Gioia 《Journal of heterocyclic chemistry》1980,17(4):763-765
The oxidation of 3,4-disubstituted isoxazolin-5-ones with active manganese dioxide leads to the formation of C-C and/or C-N linked coupling products. 相似文献
75.
76.
Beccalli EM Broggini G Paladino G Penoni A Zoni C 《The Journal of organic chemistry》2004,69(17):5627-5630
A divergent synthesis of quinazolin-4-ones and 1,4-benzodiazepin-5-ones by Pd(II)-catalyzed intramolecular amination of tosylated N-allyl-anthranilamides is described. Both kinds of products were available in high yields depending on the different reaction conditions. 相似文献
77.
Using information on πd → πd, pp → pp and pp ? πd we apply the Bohr criterion to several A = 2 partial wave amplitudes. The negative outcome for Jπ = 3? makes the existence of a broad 3F3 di-nucleon resonance B2 hardly consistent with the information presently available. We ascribe alleged evidence for B2 to s-dependence of intermediate NΔ states. An additional B2 test is suggested. 相似文献
78.
Q. Ingram E. Boschitz L. Pflug J. Zichy J.P. Albanèse J. Arvieux 《Physics letters. [Part B]》1978,76(2):173-176
Results are reported for the elastic scattering of π+ and π? by 16O and 40Ca between 115 MeV and 240 MeV. Large differences between the π+ and π? cross sections are observed up to large angles which are substantially explained by simple Coulomb effects. 相似文献
79.
The aim of this study was to evaluate efficiency of photosensitization as surface sanitation alternative using model systems when food pathogens, their spores and biofilms were attached to the food-related surface (polyolefine). In addition it was important to compare antibacterial efficiency of Na-Chlorophyllin (Na-Chl)-based photosensitization with conventional sanitizers. Obtained results indicate that Bacilluscereus ATCC 12826 and Listeriamonocytogenes ATCC 7644 as well as their thermoresistant strains B.cereus SV90 and L.monocytogenes 56LY were effectively inactivated (7 log) by Na-Chl-based photosensitization in vitro. Inactivation rate of thermoresistant strains was slower. The number of attached to the surface B.cereus ATCC 12826 and L.monocytogenes ATCC 7644 was reduced from 4-4.5 log to 0 log after photosensitization treatment. To achieve adequate inactivation of thermoresistant strains the higher Na-Chl concentration and longer illumination times had to be used. Comparison of different surface decontamination treatments reveal that photosensitization is much more effective against all surface-attached B.cereus and L.monocytogenes strains than washing with water or 200 ppm Na-hypochlorite. It is important to note, that surface-attached B.cereus spores and L.monocytogenes biofilms can be eliminated from it by photosensitization as well. Our data support the idea that Na-Chlorophyllin-based photosensitization has high antibacterial potential which may serve in the future for the development of human and environment friendly, non-thermal surface decontamination technique. 相似文献
80.
A novel synthetic strategy based on the intramolecular palladium-catalyzed oxidative cyclization reaction, allows the formation of C-C bond and the synthesis of β-carbolinones. The reaction has been performed in the presence of catalytic amount of PdCl2(CH3CN)2 and benzoquinone as a reoxidant. 相似文献