Reactions With Hydrazonoyl Halides 45: Synthesis of Some New Triazolino[4,3‐<i>a</i>]pyrimidines, Pyrazolo[3,4‐<i>d</i>]pyridazines, Isoxazolo[3,4‐<i>d</i>]pyridazines, and Thieno[2,3‐<i>b</i>]pyridines
作者:Abdou O. Abdelhamid、Ali A. Al‐Atoom
DOI:10.1080/00397910500330593
日期:2006.2
Abstract Triazolino[4,3‐a]pyrimidines pyrazolo[3,4‐d]pyridazines and isoxazolo[3,4‐d]pyridazines were synthesized from hydrazonoylhalides. Also, 3‐aminothieno[2,3‐b]pyridines and pyrimidino[4′,5′:4,5]thieno[2,3‐b]pyridines were synthesized from cynothioacetamide. Structures of the newly synthesized compounds were established on the basis of elemental analyses and spectral data.
HETEROCYCLIC SYNTHESIS USING NITRILIMINES: PART 3(1). SYNTHESIS OF SUBSTITUTED 1,2,4,5-TETRAZINES AND 1,2,4,5-TETRAAZA-2-PENTENES
作者:Hany M. Dalloul、Peter H. Boyle
DOI:10.1515/hc.2003.9.5.507
日期:2003.1
The reaction of nitrilimines 2a.b with hydrazones of aliphatic ketones 3 (RHNN=CR'R) led to the formation of the cyclocondensation products 1,2,4,5-tetrazines 4a-g when R = CH3, and to acyclic electrophilic addition products 5a-g when R = H, rather than the cyclocondensation tetrazines products 8.
当 R = CH3 时,腈亚胺 2a.b 与脂肪族酮 3 腙 (RHNN=CR'R) 的反应导致环缩合产物 1,2,4,5-四嗪 4a-g 的形成,以及非环状亲电加成当 R = H 时产物 5a-g,而不是环缩合四嗪产物 8。
Simple and convenient routes to new polyheterocycles incorporating pyrazole, thiazole, thiophene, and 1,3,4-thiadiazole moieties
作者:Zaghloul E. Kandeel、Kamal M. Dawood、Eman A. Ragab、Ahmad M. Farag
Regioselective synthesis of diazaspiro[4.4]nona‐ and tetrazaspiro[4.5]deca‐2,9‐diene‐6‐one derivatives
作者:Ahmad M. Farag、Yehya M. Elkholy、Korany A. Ali
DOI:10.1002/jhet.5570450134
日期:2008.1
4]nona-2,8-diene-6-one derivatives were synthesised via cycloaddition of nitrilimides to 3-aryliden-2(3H)-furanone derivatives. The formed products react with hydrazine hydrate to give the corresponding pyrazolecarbohydrazide derivatives which undergo intramolecure cyclization upon treatment with HCl/AcOH mixture to affored 1,2,7,8-tetrazaspiro[4.5]deca-2,9-diene-6-one derivatives. Molecular mechanics
Novel Regioselective Synthesis and Biological Activity of 6-Phenylazo and 3,6-Bis(arylazo)-7-hydroxy-1H-[1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
作者:Sayed M. Riyadh
DOI:10.1002/jccs.200500080
日期:2005.6
hydrazonoyl halides 2 and N,2-diaryl-diazinecarbohydrazonoyl halides 9 in dioxane in the presence of triethylamine under reflux furnishes 6-phenylazo and 3,6-bis(arylazo)-7-hydroxy-1H-[1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-onederivatives 7 and 10, respectively. The biological activities of the products were evaluated.