Reactions with Hydrazonoyl Halides 63: Synthesis and Anticancer Activity of Some New 1,3,4-Thiadiazoles, 1,3,4-Selenadiazoles, and 1,2,4-Triazolo[4,3-<i>a</i>]pyrimidines
作者:Eman K. A. Abdelall、Mahmoud A. Mohamed、Abdou O. Abdelhamid
DOI:10.1080/10426500903348013
日期:2010.8.25
4-selenadiazoles, and triazolino[4,3-a]pyrimidines containing benzoxazole or benzothiazole moieties were prepared from the reaction of each of ethyl 3-aza-3-(benzoxazol-2-ylamino)-2-chloroprop-2-enoate and ethyl 3-aza-3-(benzothiazolo-2-ylamino)-2-chloroprop-2-enoate with each of potassium thiocyanate, potassium selenocyanate, alkyl carbodithioate, and pyrmidine-2-thione derivatives. All the newly synthesized
Reactions with Hydrazonoyl Halides XXX: Synthesis of Some 2,3-Dihydro-1,3,4-Thiadiazoles and Unsymmetrical Azines Containing Benzothiazole Moiety
作者:Abdou O. Abdelhamid、Nora M. Rateb、Kamal M. Dawood
DOI:10.1080/10426500008082403
日期:2000.1.1
to give 2,3-dihydro-1,3,4-thiadiazoles in good yields. In contrast, hydrazonoyl bromides react with each of phenylthiourea (19a), phenylthiosemicarbazide (19b), and benzoylthiosemicarbazide (19c) afforded 5-arylazothiazole 22–24(a-c) derivatives, respectively. Structures of the new compounds were elucidated on the basis of elemental analyses, spectral data, and alternative methods of synthesis whenever
series of newderivatives of 1,2,4-triazole-3-thiol. As starting materials methyl 3-acyldxithiocarbazates were used, which on reaction with amines gave the corresponding 4,5-disubstituted 1,2,4-triazole-3-thiol derivatives (3). Into the 4-position of the 1,2,4-triazole-3-thiol system a β-hydroxyethyl substituent was introduced (compounds 4). These compounds were alkylated with methyl iodide to from 6, with
Reactions with Hydrazonoyl Halides 40: Synthesis of Some New 1,3,4‐Thiadiazoles, Pyrrolo[3,4‐<i>c</i>]pyrazoles, Pyrazoles, and Pyrazolo[3,4‐<i>d</i>]pyridazines
作者:Chahid Moustapha、Nadia A. Abdel‐Riheem、Abdou O. Abdelhamid
DOI:10.1081/scc-200048444
日期:2005.1
Abstract Pyrazoles, pyrazolo[3,4‐d]pyridazines, pyrrolo[3,4‐d]pyrazole‐4,6‐diones, and 2,3‐dihydro‐1,3,4‐thiadiazoles were synthesized via reactions of hydrazonoyl bromide with each of (2E)‐3‐(dimethylamino)prop‐2‐enoyl]benzo[f]2H‐chromen‐3‐one, N‐arylmaleimides, and alkyl carbodithioates.