Ketoketenegem-Dithiols in the Synthesis of Pyrimidine and Pyrazole Derivatives Pyrimidin- und Pyrazol-Derivate aus geminalen Dithiolen eines Ketoketens
作者:Salem E. Zayed、M. A. Hassan、Fatma M. Manhi、Ibrahim A. Hussin
DOI:10.1002/ardp.19893221116
日期:——
dimercaptal 1 prepared from 4‐acetylbiphenyl and CS21) is a subject of current interest. The reaction of α‐ketoketene‐S,S‐acetals and α‐cyanoketene‐S,S‐acetals with guanidine and thiourea to give pyrimidinederivatives was reported2,3).
Zayed, Salem E.; Hussin, Ibrahim A., Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 84, # 1-4, p. 191 - 196
作者:Zayed, Salem E.、Hussin, Ibrahim A.
DOI:——
日期:——
Zayed, Salem E., Phosphorus, Sulfur and Silicon and the Related Elements, 1992, vol. 71, p. 193 - 196
作者:Zayed, Salem E.
DOI:——
日期:——
Zayed Salem E., Hussin Ibrahim A., Phosph., Sulfur and Silicon and Relat. Elem, 84 (1993) N 1-4, S 191-196
作者:Zayed Salem E., Hussin Ibrahim A.
DOI:——
日期:——
KETOKEN GEM-DITHIOLS AND TRITHIONES: SYNTHESIS AND STUDY OF THE BEHAVIOR TOWARDS DIPOLE REAGENTS; SYNTHESIS OF SOME NITROGEN HETEROAROMATICS
作者:Salem E. Zayed
DOI:10.1080/10426509608029632
日期:1996.1.1
Abstract The behavior of ketoken gem-dithiols towards active methylene and methyl groups resulted in the formation of thiopyrano-dihydrocaumarine derivatives IIIa, b via cyclocondensation reaction between substituted 4-dihydrocyclohexanone Ia, b. N-phenylpyrazoline derivative VI was also formed through reaction of gem-dithiol IV with malonic acid followed by phenyl hydrazine. Pyridopyridazine derivative
摘要 酮基二硫醇对活性亚甲基和甲基的行为导致通过取代的 4-二氢环己酮 Ia、b 之间的环缩合反应形成噻吩并二氢黄豆素衍生物 IIIa、b。N-苯基吡唑啉衍生物VI也通过偕二硫醇IV与丙二酸和苯肼反应形成。还可以合成吡啶并哒嗪衍生物XII。还研究了 XV 中硫酮基团对某些偶极系统的行为,以得到螺产物 XVIII-XX。