Direct Formation of Ring-Fused 1,3-Thiazine-2,4-dithiones from Aromatic <i>o</i>-Amino Carboxylic Acids: Observation of a Carbon Disulfide Mediated Thionation
作者:Philipp A. Ottersbach、Paul W. Elsinghorst、Hans-Georg Häcker、Michael Gütschow
DOI:10.1021/ol101471g
日期:2010.8.20
A facile synthesis of 2H-3,1-benzothiazine-2,4(1H)-dithiones (trithioisatoic anhydrides) or 2H-naphtho[2,3-d][1,3]thiazine-2,4(1H)-dithione solely from anthranilic acids or 3-amino-2-naphthoic acid and carbon disulfide, performed at room temperature in 1,4-dioxane in the presence of Et3N, is reported. Corresponding 2-alkylsulfanyl derivatives were obtained in one-pot reactions under the same conditions
2 H -3,1-苯并噻嗪-2,4(1 H)-二硫酮(三硫代硬脂酸酐)或2 H-萘[2,3- d ] [1,3]噻嗪-2,4(1 )的简便合成据报道,在室温下在Et 3 N存在下于1,4-二恶烷中进行的仅由邻氨基苯甲酸或3-氨基-2-萘甲酸和二硫化碳制得的H)-二硫酮。加入卤代烷后,在相同条件下,通过一锅法反应获得了相应的2-烷基硫烷基衍生物。使用13 C标记的二硫化碳研究了噻嗪环化的机理,结果表明二硫化碳被掺入杂环中并另外充当了硫磺化试剂。