Reactions with Hydrazonoyl Halides 42<sup>1</sup>: Synthesis of Some New 2,3-Dihydro-1,3,4thiadiazoles, 2,3-Dihydro-1,3,4-selenadiazoles and Triazolino[, ]pyrimidines
作者:Abdou O. Abdelhamid、Mohamed A. M. Alkhodshi
DOI:10.1080/104265090508091
日期:2005.1.1
Abstract 2,3-Dihydro-1,3,4-thiadiazoles, 2,3-dihydro-1,3,4-selenadiazoles, unsymmetrical azines and triazolino[ [4] , [3] ]pyrimidines were prepared from reaction of (2Z)-3-aza-2-bromo-1-naphto[ [1] , [2] ]furan-2-yl-3-(phenylamino)prop-2-en-1-one (6) with each of potassium thiocyanate, potassium selenocyanate, alkyl carbodithioate, ethyl 6-methyl-2-methylthio-4-substituted 3,4-dihydropyrimidine-5-carboxylate
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
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.