Studies related to penicillins. Part I. 6-α-Chloropenicillanic acid and its reaction with nucleophiles
作者:I. McMillan、R. J. Stoodley
DOI:10.1039/j39680002533
日期:——
The preparation of 6-α-chloropenicillanic acid from the deamination of 6-β-aminopenicillanic acid has been improved, and the reaction is shown to proceed by way of 6-azopenicillanic acid. Benzyl 6-azopenicillanate has been isolated from the reaction of benzyl 6-β-aminopenicillanate with nitrous acid. Methyl 6-α-chloropenicillanate is rearranged to 6-azidocarbonyl-2,3-dihydro-3S-methoxycarbonyl-2,2-dimethyl-1
Synthesis and antiviral activity of certain thiazole C-nucleosides
作者:Prem C. Srivastava、Michael V. Pickering、Lois B. Allen、David G. Streeter、Marie T. Campbell、Joseph T. Witkowski、Robert W. Sidwell、Roland K. Robins
DOI:10.1021/jm00212a014
日期:1977.2
glycosylthiocarboxamides were utilized as the precursors for the synthesis of 2-D-ribofuranosylthiazole-4-carboxamide and 2-beta-D-ribofuranosylthiazole-5-carboxamide (23). The structural modification of 2-beta-D-ribofuranosylthiazole-4-carboxamide (12) into 2-(2,3,5-tri-O-acetyl-beta-D-ribofuranosyl)thiazole-4-carboxamide (15), 2-beta-D-ribofuranosylthiazole-4-thiocarboxamide (17), and 2-(5-deoxy-beta-D-ribofuranos
The Alkaline Hydrolysis of Aryl (2<i>E</i>)-3-(4‘-Hydroxyphenylazo)propenoates. A Kinetic Study
作者:Giorgio Cevasco、Daniele Vigo、Sergio Thea
DOI:10.1021/jo015795m
日期:2001.11.1
alkaline hydrolysis of the title esters, possessing three conjugated pi units between the internal nucleophile (the hydroxyl group) and the reaction center, follows an E1cBmechanism involving the participation of an "extra extended" p-oxo azoketene type intermediate. For the hydrolysis of the 2,4-dinitrophenyl ester kinetic data, activation parameters and trapping of the intermediate are consistent with
Dihydropyrimidine Compounds and Their Uses in Preparation of Medicaments for Treating and Preventing Antiviral Diseases
申请人:Li Song
公开号:US20100087448A1
公开(公告)日:2010-04-08
The present invention relates to a compound of formula (I) or a pharmaceutically acceptable salt or hydrate thereof, to a process for preparing the compound of formula (I), and to use of the compound of formula (I) or a pharmaceutically acceptable salt or hydrate thereof as a medicament, in particular as a medicament for the treatment and prevention of type B hepatitis.
Disclosed are compounds which inhibit histone deacetylase (HDAC) enzymatic activity. Also disclosed are pharmaceutical compositions comprising such compounds as well as methods to treat conditions, particularly proliferative conditions, mediated at least in part by HDAC.