Copper-Catalyzed Tandem Sulfuration/Annulation of Propargylamines with Sulfur via C–N Bond Cleavage
作者:Hong-Hui Xu、Xiao-Hong Zhang、Xing-Guo Zhang
DOI:10.1021/acs.joc.9b00685
日期:2019.6.21
oxidative sulfuration and annulation of propargylamines with elemental sulfur is described. The tandem reaction involves C–N bond cleavage and the formation of multiple C–S bonds, affording 1,2-dithiole-3-thiones in good to excellent yields with good functional group tolerance.
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。
A simple and practical strategy for the preparation of 1,2‐dithiole‐3‐thiones via copper‐catalyzed defluorinative thioannulation of trifluoropropynes has been developed using elemental sulfur as the sole sulfur source. This reaction displays a wide substrate scope and high functional group tolerance to afford the corresponding S‐heterocycles in moderate to good yields and features efficient construction