5-amino-3-mercapto

MERCAPTO-4-AMINO-5-CARBETHOXYPYRIMIDINE (6-Pyrimidinecarboxylic acid, 4-amino-2-mercapto-, ethyl ester)... 

C5H2Hgi,N40, Tetrakis(cyanomercuri )methane hydrate, 44B, 1122 C5HgCl2Hg202, 3,3-Bis(chloromercury)-2,4-pentadione, 4IB, 817 C5HsHgN2S, Methyl 2-mercaptopyrimidinatomercury(II), 44B, 683 CsH7HgN30S H2O, (4-Amino-2-mercapto-6-pyrimidionato)methylmercury-(II) monohydrate, 46B, 767... 

Note typically R and R = CHj or C2H5 X = organic functional group, for example amino, mercapto, vinyl, epoxy, methacryloxy. 

Commercially available glass chips provide reactive aldehyde-, amino-, mercapto-, isothiocyante-, active ester- or epoxy-groups for covalent binding of DNA (www.arrayit.com www.picorapid.com www.prolinx.com www.accelr8.com www4.amershambiosciences.com las.perkinelmer.com www.schleicher-schuell.com www.quantifoil.com www.xenopore.com ... 

V-(3-Chloro-4-fluorophenyl )amino(mercapto)methylenemalonate (344) was reacted with 4-methoxybenzyl chloride in the presence of potassium carbonate in acetonitrile at ambient temperature for 3 hr to give AM3-chloro- 4 -fluorophenyl)amino[ (4-methoxybenzyl)thio]methy lenemalonate (345) in 81% yield (82EUP58392). 

In the case of three-membered rings, when the tautomerism involves an antiaromatic functional tautomer (hydroxy, amino, mercapto), the nonaromatic (oxo, imino, thio) tautomer is always the only form observed even in the most unfavorable case (alkylidene vs alkyl) 8 (X = O, NR, CHR R"), 9 (Y = O, S X = O, NR, CHR R"), 10 (X = O, NR ), and 11 (X = NR ). For instance, 8 (R = H, X = O) has been obtained as a matrix-isolated species and the geometry and vibrational frequencies were reproduced by ab initio calculations (94JA60). Compound 9 (Y = S, X = NH) has been calculated (RHF/6-31G and MP2/6-31G ) (90JPC1335 91JOC5651) and the resulting geometry successfully compared with that of a substituted thi-... 

In summaiy, depending on polymer type, amino, mercapto, epoxy, or vinyl are the most common functional groups which react with the polymer. Alkoxy or chlorine groups are often used to react with the filler surface, chlorine being less popular because it produces hydrogen chloride, a corrosive material. 

With o-amino mercapto heterocyclic rings and formation of condensed thiazolo-2-thiones.588... 

Examples of ring closures with c-amino mercapto heterocyclic compounds are the reactions of carbon disulfide with o-amino mercapto pyridines and o-amino mercapto quinolines, which respectively yield dihydrothiazolo pyridine-2-thiones and dihydrothiazolo qumohne-2-thiones. A summary of these compounds are 7 ... 

Im folgenden werden deshalb nur solche Verfahren fur die Synthese von Amino-hydroxy-und Amino-mercapto-carbonsauren behandelt, bei welchen der Aulbau dieser beiden Gruppen jeweils im Zusammenhang mit der Gesamtsynthese steht. 

Poland). Contrary to other versions of this method, the catalytic system used in this reaction (tertiary phosphines with KI) made it possible to obtain product in high yield, under mild conditions [12]. 3-Chloropropyltrimethoxysilane (which is also manufactured by Unisil) is a good starting material for synthesis of various silane coupling agents, such as methacryloxy-, amino-, mercapto-or ureido-functional silanes. 

Blajiev, O. and A. Hubin, Inhibition of copper corrosion in chloride solutions by amino-mercapto-thiadiazol and methyl-mercapto-thiadiazol An impedance spectroscopy and a quantum-chemical investigation. Electrochimica Acta, 2004. 49(17-18) p. 2761-2770. 

M.p. -151°. B.p. -56° (-41°). Readily polymerises to 1 3-diketocyclobutane. Stable to O. Reacts with hydroxy, amino, hydroxyl-amino, mercapto, etc., groups —y acetyl dc-rivs. T ical reactions are H 0 —>... 

Table 7.5 Effect of immobilized amino-mercapto compounds on NS H 3 jPW,20 p (reaction time 6 h, temperature 80°C, phenoEacetone molar ratio 10 1) [47].

Amino- mercapto Compound (NS) X in Formula Yield (%) Conversion (%) Selectivity (%)... 

Amino acids are carboxylic acids that bear an amine group. The most common of these in nature are the 2-amino acids, or a-amino acids, which have the general formula RCH(NH2)C00H that is, the amino function is located at C2, the a-carbon. The R group can be aUcyl or aryl, and it can contain hydroxy, amino, mercapto, sulfide, carboxy, gua-nidino, or imidazolyl groups. Because of the presence of both amino and carboxy functions, amino acids are both acidic and basic. 

L.D.S. Yadav, V.K. Rai, B.S. Yadav, The first ionic liquid-promoted one-pot diastereoselective synthesis of 2,5-diamino- /2-amino-5-mercapto-l,3-thiazin-4-ones using masked amino/mercapto adds. Tetrahedron 65 (2009) 1306-1315. 

Thus reduction of the 5-thiocyanato group of 151 by zinc (333, 360, 361) or aqueous sodium sulfide (348. 362), hydrolysis of the thiouronium group (7, 363, 364), and deacetylation of the 5-acetylthiothiazole with cold piperidine (365) have been performed to yield the 5-mercapto-thiazole (Scheme 78). It must be pointed out that depending on the experimental conditions, bis(5-thiazolyl(sulfide may be observed as a byproduct (363, 365). Thus 5-amino-4-methylthiazole (152) treated with... 

Heating 5-amino-4-mercapto pyrimidines (61) with formic acid affords the corresponding thiazolo[5,4d]pyrimidines (62) (Scheme 28) (357, 382, 411, 431). 

This method has mainly been used to prepare thiazoles nonsubstituted in the 2-position and involves the replacement of a functional substituent (amino, halo, mercapto, hydroxy, or carboxy) by a hydrogen. In this way the often delicate cyclization of thioformamide can be avoided. 

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