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Showing 13 to 24 of 510 entries
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Co-crystal screening of diclofenac.

Pharmaceutics

Aakeröy CB, Grommet AB, Desper J.
PMID: 24310599
Pharmaceutics. 2011 Aug 31;3(3):601-14. doi: 10.3390/pharmaceutics3030601.

In the pharmaceutical industry, co-crystals are becoming increasingly valuable as crystalline solids that can offer altered/improved physical properties of an active pharmaceutical ingredient (API) without changing its chemical identity or biological activity. In order to identify new solid forms...

An Improved Synthesis of 7-Substituted Pyrrolo[3,2-d]pyrimidines.

The Journal of organic chemistry

Elliott AJ, Morris PE, Petty SL, Williams CH.
PMID: 11671913
J Org Chem. 1997 Nov 14;62(23):8071-8075. doi: 10.1021/jo971062j.

Base (NaOMe)-catalyzed condensation of 3,3-dimethoxypropionitrile with aldehydes followed by hydrolysis with 6 N HCl gives the unsaturated cyano aldehydes 5. Catalytic reduction of the double bond followed by reaction with diethyl aminomalonate affords the enamines 7, which cyclize to...

Synthesis and Conformational Study of 3-Hydroxy-4-(Hydroxymethyl)-1-Cyclohexanyl Purines and Pyrimidines.

The Journal of organic chemistry

Maurinsh Y, Schraml J, De Winter H, Blaton N, Peeters O, Lescrinier E, Rozenski J, Van Aerschot A, De Clercq E, Busson R, Herdewijn P.
PMID: 11671649
J Org Chem. 1997 May 02;62(9):2861-2871. doi: 10.1021/jo962204x.

The cyclohexane nucleosides with a 1,4-relationship between nucleoside base and hydroxymethyl moiety were synthesized using a conjugated addition reaction of the nucleobases to ethyl 1,3-cyclohexadiene-1-carboxylate and hydroboration of the cyclohexenyl precursor. The lack of antiviral activity of the compounds...

An efficient synthesis of pyrrolo[2,3-d]pyrimidines via inverse electron demand diels-alder reactions of 2-amino-4-cyanopyrroles with 1,3,5-triazines.

The Journal of organic chemistry

Dang Q, Gomez-Galeno JE.
PMID: 12444666
J Org Chem. 2002 Nov 29;67(24):8703-5. doi: 10.1021/jo026309d.

The scope of the inverse electron demand Diels-Alder reaction of 2-amino-4-cyanopyrroles (3a-e) with 1,3,5-triazines (1, 2) is reported. This methodology is suitable for one-pot syntheses of highly substituted and highly functionalized pyrrolo[2,3-d]pyrimidines that are the central heterocyclic nucleus of...

New entry to a three-component pyrimidine synthesis by TMS-Ynones via Sonogashira coupling.

Organic letters

Karpov AS, Müller TJ.
PMID: 12967297
Org Lett. 2003 Sep 18;5(19):3451-4. doi: 10.1021/ol035212q.

[reaction: see text] TMS-ynones are versatile synthetic equivalents of beta-keto aldehydes and can be readily synthesized in an atom-economical fashion by coupling (het)aroyl chlorides and (TMS)-acetylene with only one equiv (!) of triethylamine under Sonogashira conditions. This mild ynone...

Inhibition of Growth, Synthesis, and Permeability in Neurospora crassa by Phenethyl Alcohol.

Journal of bacteriology

Lester G.
PMID: 16562036
J Bacteriol. 1965 Jul;90(1):29-37. doi: 10.1128/jb.90.1.29-37.1965.

Lester, Gabriel (Reed College, Portland, Ore.). Inhibition of growth, synthesis, and permeability in Neurospora crassa by phenethyl alcohol. J. Bacteriol. 90: 29-37. 1965.-Inhibition of the growth of Neurospora crassa in still culture was detected at 0.05% and was complete...

One-pot synthesis of novel 1H-pyrimido[4,5-c][1,2]diazepines and pyrazolo[3,4-d]pyrimidines.

Beilstein journal of organic chemistry

Prajapati D, Baruah PP, Gogoi BJ, Sandhu JS.
PMID: 16556308
Beilstein J Org Chem. 2006 Mar 23;2:5. doi: 10.1186/1860-5397-2-5.

Novel 1H-pyrimido [4,5-c][1,2]diazepines 3 & 4 and pyrazolo [3,4-d]pyrimidines 6 were regioselectively synthesised by the reaction of 1,3-dimethyl-6-hydrazinouracils 1 with various alpha,beta-unsaturated compounds 2 and alpha-ketoalkynes 8 in excellent yields.

Metabolism of Common Substrates by the Reiter Strain of Treponema pallidum.

Infection and immunity

Allen SL, Johnson RC, Peterson D.
PMID: 16558046
Infect Immun. 1971 Jun;3(6):727-34. doi: 10.1128/iai.3.6.727-734.1971.

The utilization of glucose, amino acids, fatty acids, bicarbonate, purines, and pyrimidines by the Reiter treponeme was studied by using carbon 14-labeled substrates. The distribution of carbon from the substrates into various cell components was determined. Radioactivity from labeled...

Note on the preparation of purines and pyrimidines from nucleic acid.

The Biochemical journal

Hunter G, Hlynka I.
PMID: 16746361
Biochem J. 1937 Mar;31(3):486-7. doi: 10.1042/bj0310486.

No abstract available.

Heterocyclizations with tosylmethyl isocyanide derivatives. A new approach to substituted azolopyrimidines.

The Journal of organic chemistry

Baeza A, Mendiola J, Burgos C, Alvarez-Builla J, Vaquero JJ.
PMID: 15932336
J Org Chem. 2005 Jun 10;70(12):4879-82. doi: 10.1021/jo050029r.

An efficient synthesis of substituted azolopyrimidines such as pyrido[3',2':4,5]pyrrolo[1,2-c]pyrimidines, pyrimido[1,6-a]indoles, benzo[4,5]imidazo-[1,2-c]pyrimidines, an imidazo[1,2-c]pyrimidine, and pyrazolo[1,5-c]pyrimidines is described. The method involves the reaction of N-protected bromomethylazoles and tosylmethyl isocyanide (TosMIC) derivatives in nonanhydrous media. The study of the reaction conditions...

RESEARCHES ON PYRIMIDINES. CLIII. THE STRUCTURE OF VITAMIN B1.

Science (New York, N.Y.)

Johnson TB, Litzinger A.
PMID: 17830336
Science. 1936 Jul 03;84(2166):25-6. doi: 10.1126/science.84.2166.25.

No abstract available.

Thiyl radical interaction with pyrimidine C5-C6 double bond.

The journal of physical chemistry. B

Wójcik A, Naumov S, Marciniak B, Hermann R, Brede O.
PMID: 16852915
J Phys Chem B. 2005 Aug 11;109(31):15135-44. doi: 10.1021/jp051711s.

Addition and elimination interaction of thiyl radicals with the C5-C6 double bond in pyrimidines was studied by the pulse radiolysis technique in aqueous solution with the use of different monitoring systems. For this purpose, p-thiocresol, cysteamine hydrochloride, and mercaptoethanol...

Showing 13 to 24 of 510 entries