[EN] USE OF A L,3J5-TRIAZIN-2-YL PHOSPHORAMIDATE COMPOUND IN THE SYNTHESIS OF SOFOSBUVIR [FR] UTILISATION D'UN COMPOSÉ PHOSPHORAMIDATE DE 1,3,5-TRIAZIN-2-YLE DANS LA SYNTHÈSE DE SOFOSBUVIR
A direct facile and effective synthesis of various 1,1-heterodiaryl alkenes through Pd catalyzed cross coupling reaction using N-tosylhydrazones via C–OH bond activation
作者:Poojan K. Patel、Jignesh P. Dalvadi、Kishor H. Chikhalia
DOI:10.1016/j.tetlet.2015.10.022
日期:2015.11
At this event for the first time, the direct arylation with the generation of a facile and effective process for the synthesis of alkenes has been established through in situ C–OH activation afterward Pd catalyzed C–C bond formation of heteroarenols with N-tosylhydrazones. The noticeable features of these reactions are (1) No stoichiometric organometallic reagents desired, (2) No necessity of halides
Useful Reagents for Introduction of Boc and Fmoc Protective Groups to Amines: Boc-DMT and Fmoc-DMT
作者:Munetaka Kunishima、Kazuhito Hioki、Mizuho Kinugasa、Michiko Kishimoto、Miho Fujiwara、Shohei Tani
DOI:10.1055/s-2006-942389
日期:2006.6
New amino-protecting reagents, Boc-DMT and Fmoc-DMT, were prepared, and found to be useful for the introduction of Boc and Fmoc groups into amines. Both the reagents can protect various amines including amino acids in good yield in aqueous media. Since the reagents are neither unstable nor irritating, they are practically useful.
A new active carbonate ester, benzyl 4,6-dimethoxy-1,3,5-triazinyl carbonate (Z-DMT), was prepared, and found to be a useful reagent for the introduction of benzyloxycarbonyl group into amines. Since Z-DMT is neither unstable nor irritating, it is practically useful.
nic acid (∼200 mol %). Considerable rate acceleration of benzylation, allylation, and p-nitrobenzylation was observed as compared to the reactions with less than 100 mol % of the acid catalyst. The triazine-based leaving group showed superior p-nitrobenzylation yield and stability in comparison to common leaving groups, trichloroacetimidate and bromide. A plausible reaction mechanism (the cationic
Chemical Modification of Rupestonic Acid and Preliminarily In Vitro Antiviral Activity Against Influenza A<sub>3</sub>and B Viruses
作者:Jian-Ping Yong、Haji Akber Aisa
DOI:10.5012/bkcs.2011.32.4.1293
日期:2011.4.20
To improve the biological activities of rupestonic acid, 21 new rupestonic acid fatty ester derivatives (2a-2h) and aromatic ester derivatives (2i-2u) were synthesized and preliminarily evaluated for their anti-influenza activity in vitro by the national center for drug screening of China, using the Oseltamivir and Ribavirin as reference drugs. The results showed that 2l ($IC_50}=0.5\mu}mol/L$) exhibited potent anti-influenza $A_3$ viral activity among the synthesized compounds and was 10-fold more potent than that of the reference drug Oseltamivir ($IC_50}=5.1\mu}mol/L$).