5-Ethyl-2-mercapto

Ethoxycarbonyl-l-ethyl-6-fluor-4-oxo-1,4-dihydro-7-chinolyl)-2-(4-ethoxy-carbonyl-piperazino)- 61 2-( 1 -Ethoxycarbonyl-ethy l)-4-hydroxy- 12 4-Ethoxycarbonyl-5-ethyl-2-mercapto- 204... 

Ethyl mercapto ethyl thiocyanate demeton-S-ethyl, demeton-S-methyl, demeton-S-methyl sulfone, oxydemeton Ethyl methallyl amine ethalfluralin... 

Thiazolidines (76) undergo facile ring-chain tautomerism, thus affording a latent source of thiol-imine, which can be trapped with ethyl mercapto-acetate at 100°-110° to afford 77 in low yield [Eq. (22)].63 If the corresponding acid is used and water is continuously removed, the yield of 77 approaches 75%. 

Thymine. S-Methyt-2,4(IHt3H)-pyritnidinedione 5 -metbyluracil 2,4 -dihydroxy - 5 -methylpyrimidine. C,H4 -N202 mol wt 126.11. C 47.62%, H 4.80%, N 22.22%, O 25.37%. A pyrimidine derivative constituent of nucleic acids. Originally isolated from thymus nucleic acid Levene, Z. Physiol Chem. 39, 4 (1903). Prepn by heating 2-ethyl-mercapto-4-hydroxy-5-methyl pyrimidine Wheeler, Mer-... 

Substituted-polythiophenes showed a remarkable effect on degradation and stability in electrochemical systems where poly(3-methylthiophene) was observed to be the most stable and poly(3,4-bis(ethylmercapto) thiophene) to be the least stable in the experiments conducted by Tsai et al. [272] on poly(3-ethyl-mercapto-thiophene), poly(3-hexylthiopliene), poly(3-methyl-thiophene) and poly(3,4-bis(ethylmercapto)thiophene). 

M ethyl mercapto) propionaldehyde. See 3-Methylthiopropionaldehyde Methyl 3-mercaptopropionate CAS 2935-90-2... 

A soln. of 2-ethylmercapto-4-hydroxy-6-diethoxymethylpyrimidine and hy-droxylamine hydrochloride in water-ethanol refluxed 15 min. 2-ethyl-mercapto-4-hydroxy-6-pyrimidinecarboxaldehyde oxime. Y 89%. J. P. Horwitz and A. J. Tomson, J. Org. Ghem. 26, 3392 (1961). 

Ethyl-cf-chloroacetoacetate gives 5-carbethoxy-4-methyl-2-thiazole thiol (387), while 3-chloro-2,4-pentanedione affords the 2-mercapto-4-methyl-5-thiazolylmethylketone in good yield (74%) (387). 

Similarly, ethylbromopyruvate yields ethyl-2-mercapto-4-thiazole car-boxylate (488). 

The cyclization of a-mercaptoketones with ammonium thiocyanate leads to the corresponding 2-mercaptothiazoles (144). For example, 2-mercapto-3-pentanone in ethereal solution with sulfuric acid gives 4-ethyl-5-methyl-2-mercaptothiazole (10), Ri = SH, R2 = Et, R3 = Me, when allowed to stand for 3 hr without heating with ammonium thiocyanate. 

Salts are formed as with oxygen-containing compounds. For example, C2H5 — S—Na is named either sodium ethanethiolate or sodium ethyl sulfide. If mercapto- has been used as a prefix, the salt is named by use of the prefix sulfido- for —S . 

Thiazol-3-ium, 3-ethyl-2-[A -(3 -ethyl-2 -thiazolylidene)-3-ylidene-1 -pro pen]-1 -yl-visible, 1, 345 (B-76MI11201) Thiazolo[2,3-a]isoquinolinium, anhydro-3-(4-bromophenyl)-2-mercapto-X-ray, 6, 669 (67JCS(B)1117)... 

Pteridine-4-carboxylic acid, 4-mercapto-ethyl ester, 3, 276... 

Finally,Captopril is produced. Thethioester (0.85g) isdissolved in5.5N methanolicammonia and the solution is kept at room temperature for 2 hours. The solvent is removed in vacuo and the residue Is dissolved in water, applied to an ion exchange column on the H cycle (Dowex 50, analytical grade) and eluted with water. The fractions that give positive thiol reaction are pooled and freeze dried. The residue Is crystallized from ethyl acetate-hexane, yield 0.3 g. The 1 -(3-mercapto-2-D-methylpropanoyl)-L-proline has a melting point of 103°C to 104°C. 

Heating of the acetic acid ethyl ester-substituted mercapto-substituted pyrimidine 214 in acetic acid and sulfuric acid led to cyclodehydration to give the tricyclic system 215 in moderate yield (Equation 57) <2005PS(180)1629>. 

The supported aqueous phase methodology was applied to the system Pd(OAc)2/5 TPPTS, a catalytic precursor for the Trost-Tsuji reaction. The characterization of the solid by 31P MAS NMR confirms the presence of Pd°(TPPTS)3 as the main surface species. The catalytic properties of the solid were tested for the allylic substitution of E-cinnamylethylcarbonate by different nucleophiles such as ethyl acetoacetate, dimethyl malonate, morpholine, phenol, and 2-mercapto-pyridine. The absence of palladium leaching was demonstrated, and having solved the problem of water leaching from the solid to the organic phase, the SAP-Pd catalyst was successfully recycled several times without loss in its activity. It was used in a continuous flow experiment which... 

N-(4-hydroxycyclohexyl)-3-mercapto-3-cyano-4-arylazetidine-2-ones were synthesized from N-(4-hydroxycyclohexyl)aryldiimine by reaction with ethyl a-mercapto-a-cyanoacetate on basic alumina under microwaves. The reaction time was reduced from hours to minutes in comparison to conventional heating and, moreover, the yield was improved [121]. 

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