6306-73-6Relevant articles and documents
Molecular recognition in structured matrixes: Control of guest localization in block copolymer films
Shenhar, Roy,Xu, Hao,Frankamp, Benjamin L.,Mates, Thomas E.,Sanyal, Amitav,Uzun, Oktay,Rotello, Vincent M.
, p. 16318 - 16324 (2005)
We demonstrate the use of molecular recognition to control the spatial distribution of guest molecules within block copolymer films. Block copolymers bearing recognition units were combined with complementary and noncomplementary molecules, and the extent
3-Hydroxypyrimidine-2,4-diones as an Inhibitor Scaffold of HIV Integrase
Tang, Jing,Maddali, Kasthuraiah,Metifiot, Mathieu,Sham, Yuk Y.,Vince, Robert,Pommier, Yves,Wang, Zhengqiang
experimental part, p. 2282 - 2292 (2011/06/17)
Integrase (IN) represents a clinically validated target for the development of antivirals against human immunodeficiency virus (HIV). Inhibitors with a novel structure core are essential for combating resistance associated with known IN inhibitors (INIs). We have previously disclosed a novel dual inhibitor scaffold of HIV IN and reverse transcriptase (RT). Here we report the complete structure-activity relationship (SAR), molecular modeling, and resistance profile of this inhibitor type on IN inhibition. These studies support an antiviral mechanism of dual inhibition against both IN and RT and validate 3-hydroxypyrimidine-2,4-diones as an IN inhibitor scaffold.
DNA-protein cross-linking: Model systems for pyrimidine-aromatic amino acid cross-linking
Sun, Guangxing,Fecko, Christopher J.,Nicewonger, Robert B.,Webb, Watt W.,Begley, Tadhg P.
, p. 681 - 683 (2007/10/03)
We have synthesized simple model systems to explore the possibility of photo-cross-linking between the pyrimidine bases and the side chains of the aromatic amino acids. Thymine/phenylalanine and thymine/tyrosine models gave cross-links, and thymine/tryptophan models gave complex mixtures; the cytosine/phenylalanine model was unreactive. The quantum yields for the model cross-linking reactions were 18-46 times smaller than those for thymine dimer formation. Biphotonic excitation contributes little to the yield of these reactions.
Synthesis of carbocyclic pyrimidine nucleosides using the Mitsunobu reaction - Part I: Influence of the alcohol on N1- versus O2- alkylation
Ludek, Olaf R.,Meier, Chris
, p. 3145 - 3147 (2007/10/03)
The Mitsunobu reaction is an important tool in carbocyclic nucleoside chemistry for the direct coupling of alcohols with heterocyclic bases under mild conditions. Here, we report on the influence of the alcohol on the N1- vs. O2-alkylation of N
Synthesis, pharmacology and pharmacokinetics of 3-(4-Arylpiperazin-1-ylalkyl)-uracils as uroselective α1A-antagonists
Lopez,Arias,Chan,Clarke,Elworthy,Ford,Guzman,Jaime-Figueroa,Jasper,Morgans Jr.,Padilla,Perez-Medrano,Quintero,Romero,Sandoval,Smith,Williams,Blue
, p. 1873 - 1878 (2007/10/03)
Predominance in the urethra and prostate of the α1A-adrenoceptor subtype, which is believed to be the receptor mediating noradrenaline induced smooth muscle contraction in these tissues, led to the preparation of α1A-selective antagonists to be tested as uroselective compounds for the treatment of benign prostatic hyperplasia. Thus, a number of selective α1A-adrenoceptor antagonists were synthesized and assayed in vitro for potency and selectivity. Dog pharmacokinetic parameters of 12 (RO700004) and its metabolite 40 (RO1104253) were established. The relative selectivity of intravenously administered 12, 40 and standard prazosin to inhibit hypogastric nerve stimulation-induced increases in intraurethral prostatic pressure versus phenylephrine-induced increases in diastolic blood pressure in anesthetized dogs was 76, 71 and 0.6, respectively.
Synthesis of new nucleoside analogues comprising a geminal difluorocyclopropane moiety as potential antiviral/antitumor agents
Qiu, Yao-Ling,Zemlicka, Jiri
, p. 2285 - 2300 (2007/10/03)
Geminal difluorocyclopropane analogues of nucleosides 7a - 7e were synthesized. Compounds 7a and 7c - 7e were obtained by alkylation of nucleic acid bases or their appropriate precursors with (cis)-1- benzyloxymethyl-2-bromomethyl-3,3-difluorocyclopropane (8). Analogue 7b was prepared by hydrolysis of 2-amino-6-chloropurine derivative 7e. Compounds 7a - 7d did not exhibit any antiviral activity against HCMV, HSV-1, HSV-2, EBV, VZV, HBV and HIV-1 or antitumor effects against murine leukemia L1210, mouse tumors PO3 or C38 and human tumor H15.
HSAB driven chemoselectivity in alkylation of uracil derivatives. A high yielding preparation of 3-alkylated and unsymmetrically 1,3-dialkylated uracils
Gambacorta, Augusto,Farah, Mohamed Elmi,Tofani, Daniela
, p. 12615 - 12628 (2007/10/03)
A qualitative hardness scale (N134) has been found for the conjugated bases of 2-methoxy-4(3H)-pyrimidinones 1-3 and applied to high yielding chemoselective N3 methylation, ethylation and benzylation reactions. Removal of the 2-methoxy group followed by a second alkylation affords unsymmetrically 1,3-disubstituted uracils.