Search Results - "ROSTEK, Charles J"

Novel Syntheses of 2,3-Dihydro-1,5-benzothiazepin-4(5H)-ones and 2H-1,4-Benzothiazin-3(4H)-ones by Katritzky, Alan R, Odens, Herman H, Zhang, Suoming, Rostek, Charles J, Maender, Otto W

“…Nucleophilic additions of α-mercaptoalkanoate esters and β-mercaptoalkanoate acids to benzoquinone diimines, followed by cyclization with trifluoroacetic acid…”
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Structural assignment of regioisomeric 3-[2- or 5-anilino-2-(alkylamino)phenyl]propanoic acids, 2H-1,4-benzothiazin-3(4H)-ones and 2,3-dihydro-1,5-benzothiazepin-4(5H)-ones by 1D NOE and gHMBC NMR techniques by Katritzky, Alan R., Akhmedov, Novruz G., Wang, Mingyi, Rostek, Charles J., Steel, Peter J.

“…The 1H and 13C NMR spectra of compounds 1–11 and 16–22 in CDCl3 and DMSO‐d6 solutions allowed structural assignment to regioisomers 1/5 and 2/6 and their…”
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Synthesis and NMR spectroscopic studies of allylsulfanyl-N1-alkyl-N4-phenyl-1,4-phenylenediamines and their cyclization products, 2,3-dihydro-1-benzothiophenes and thiochromans by Katritzky, Alan R., Akhmedov, Novruz G., Wang, Mingyi, Rostek, Charles J., Steel, Peter J.

“…Regioselective addition of allylthiol at the C‐3 position adjacent to the nitrogen carrying the phenyl group of the 1,4‐phenylenediamine moiety of compounds…”
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Elucidation of the structures of 3-alkylthio-, 3-benzylthio-, 2-arylthio- and 2-heteroarylthio-N1-(1,3-dimethylbutyl)-N4-phenyl-1,4-phenylenediamines by one- and two-dimensional NMR spectroscopy by Katritzky, Alan R., Akhmedov, Novruz G., Abdel-Fattah, Ashraf A. A., Wang, Mingyi, Rostek, Charles J., Maender, Otto W.

“…Nucleophilic addition of alkyl‐ and benzylthiols to benzoquinone diimine (1) gave the corresponding 3‐alkylthio‐ or 3‐benzylthio‐1,4‐phenylenediamines (2–5)…”
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Rubber chemicals derived from conjugate addition. II. Synthesis of a novel class of benzoquinone diimines by KATRITZKY, Alan R, ODENS, Herman H, VORONKOV, Michael V, ROSTEK, Charles J, MAENDER, Otto W

“…Various 2-alkylthio-5-amino- and 2,5-diamino-1,4-phenylenediamines were prepared by treatment of N-(1,3-dimethylbutyl)- N′-phenyl-1,4-quinonediimine with…”
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Rubber chemicals derived from conjugate addition. I. Syntheses of novel 2-thio-5-amino substituted benzoquinones by KATRITZKY, Alan R, ODENS, Herman H, VORONKOV, Michael V, ROSTEK, Charles J, MAENDER, Otto W

“…Alkylthio-substituted benzoquinones were prepared from benzoquinone and mercaptans in 50–94% yields via NaIO4 oxidation of the intermediate hydroquinones…”
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Structural assignment of regioisomeric 3‐[2‐ or 5‐anilino‐2‐(alkylamino)phenyl]propanoic acids, 2 H ‐1,4‐benzothiazin‐3(4 H )‐ones and 2,3‐dihydro‐1,5‐benzothiazepin‐4(5 H )‐ones by 1D NOE and gHMBC NMR techniques by Katritzky, Alan R., Akhmedov, Novruz G., Wang, Mingyi, Rostek, Charles J., Steel, Peter J.

“…The 1 H and 13 C NMR spectra of compounds 1 – 11 and 16 – 22 in CDCl 3 and DMSO‐ d 6 solutions allowed structural assignment to regioisomers 1/5 and 2/6 and…”
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Novel Syntheses of 2,3-Dihydro-1,5-benzothiazepin-4( 5H )-ones and 2 H -1,4-Benzothiazin-3(4 H )-ones by Katritzky, Alan R., Odens, Herman H., Zhang, Suoming, Rostek, Charles J., Maender, Otto W.

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Synthesis and NMR spectroscopic studies of allylsulfanyl‐ N 1 ‐alkyl‐ N 4 ‐phenyl‐1,4‐phenylenediamines and their cyclization products, 2,3‐dihydro‐1‐benzothiophenes and thiochromans by Katritzky, Alan R., Akhmedov, Novruz G., Wang, Mingyi, Rostek, Charles J., Steel, Peter J.

“…Regioselective addition of allylthiol at the C‐3 position adjacent to the nitrogen carrying the phenyl group of the 1,4‐phenylenediamine moiety of compounds 1…”
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Rubber chemicals derived from conjugate addition. I. Syntheses of novel 2-thio--amino substituted benzoquinones by Katritzky, Alan R, Odens, Herman H, Voronkov, Michael V, Rostek, Charles J, Maender, Otto W

“…The wave-lengths and intensities of the principal maxima for 3a-c were as follows: 201-210 nm (14800 < e < 15400), 243-252 nm (6680 <e < 8280), 307-378 nm…”
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Elucidation of the structures of 3‐alkylthio‐, 3‐benzylthio‐, 2‐arylthio‐ and 2‐heteroarylthio‐ N 1 ‐(1,3‐dimethylbutyl)‐ N 4 ‐phenyl‐1,4‐phenylenediamines by one‐ and two‐dimensional NMR spectroscopy by Katritzky, Alan R., Akhmedov, Novruz G., Abdel‐Fattah, Ashraf A. A., Wang, Mingyi, Rostek, Charles J., Maender, Otto W.

“…Nucleophilic addition of alkyl‐ and benzylthiols to benzoquinone diimine ( 1 ) gave the corresponding 3‐alkylthio‐ or 3‐benzylthio‐1,4‐phenylenediamines ( 2 –…”
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Novel Sulfur Vulcanization Accelerators Based on Mercapto-Pyridine, -Pyrazine, and -Pyrimidine by Rostek, Charles J., Lin, Horng-Jau, Sikora, David J., Katritzky, Alan R., Kuzmierkiewicz, Wojciech, Shobana, Navayath

“…Sulfur vulcanization accelerators derived from 2-mercaptobenzothiazole (MBT) have been a staple for the rubber processing industry for over 65 years. Most…”
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