Synthesis of dibenzothiazepine analogues by one-pot <i>S</i>-arylation and intramolecular cyclization of diaryl sulfides and evaluation of antibacterial properties
Dibenzothiazepine analogues containing lactam, amidine and imine moieties were prepared from 2-aminophenyl disulfides via one-pot S-arylation. The S-arylation involved cleavage of an S-S bond of disulfides and SNAr reaction in aqueous ammonia solution of L-cysteine to afford diaryl sulfides. Dibenzothiazepine analogues having lactam and amidine moieties were obtained by cyclization of the corresponding
摘要 以2-氨基苯基二硫化物为原料,通过一锅S-芳基化反应制备了含有内酰胺、脒和亚胺部分的二苯并硫氮杂类似物。S-芳基化包括二硫化物的 SS 键断裂和 L-半胱氨酸氨水溶液中的 SNAr 反应,得到二芳基硫化物。具有内酰胺和脒部分的二苯并硫氮杂类似物是通过在酸性条件下环化相应的二芳基硫化物而获得的。2-溴-5-硝基苯甲醛的一锅S-芳基化通过分子内环化一步得到具有亚胺部分的二苯并硫氮杂类似物。获得了对金黄色葡萄球菌和大肠杆菌具有抗菌活性的化合物。
Microwave-assisted controllable synthesis of 2-acylbenzothiazoles and bibenzo[b][1,4]thiazines from aryl methyl ketones and disulfanediyldianilines
A condition-controlled strategy for selectively synthesis of 2-acylbenzothiazoles and bibenzo[b][1,4]thiazines from aryl methyl ketones and disulfanediyldianilines was realized using I2/DMSO or I2/MeCN systems, respectively. The desired products were synthesized in only 15 min with moderate to excellent yields (50%-90%) under microwave-assisted, metal-free conditions. The strategy provides a great
分别使用 I 2 /DMSO 或 I 2 /MeCN 系统实现了从芳基甲基酮和二硫烷二基二苯胺选择性合成 2-酰基苯并噻唑和联苯[ b ][1,4]噻嗪的条件控制策略。在微波辅助、无金属条件下,所需产物仅在 15 分钟内合成,产率中等至极好(50%-90%)。该策略为苯并噻唑和双苯并噻嗪杂环化合物的有效合成中的选择性合成应用提供了巨大优势。
AIBN-Promoted Synthesis of Bibenzo[<i>b</i>][1,4]thiazines by the Condensation of 2,2′-Dithiodianiline with Methyl Aryl Ketones
A series of bibenzo[b][1,4]thiazines with various functional groups has been synthesized by a free-radical condensation reaction. Bibenzo[b][1,4]thiazines were obtained in moderate to good yield (up to 85%) through a one-step reaction of readily available 2,2′-dithiodianiline and methyl aryl ketones with AIBN as radical initiator in HOAc. Bibenzo[b][1,4]thiazines exhibit diversiform solid-state packing
通过自由基缩合反应合成了一系列具有各种官能团的联苯并[ b ] [1,4]噻嗪。在HOAc中,通过容易获得的2,2'-二硫代二苯胺和甲基芳基酮与AIBN作为自由基引发剂的一步反应,以中等至良好的收率(高达85%)获得联苯并[ b ] [1,4]噻嗪。联苯并[ b ] [1,4]噻嗪表现出多种形式的固态堆积。
Efficient Synthesis of Benzothiazolone Derivatives by a Domino Reaction of Disulfide and COS under Mild Conditions
efficient method for preparing benzothiazolone derivatives was developed by a domino coupling reaction between the disulfide and COS in the present of NaOH. Notably, the C=O of COS was converted into benzothiazolone by carbonylation reaction and the sulfur of COS was transformed into sulfur and sulfide after cleaving the S–S bond undermildconditions. This efficient synthetic methodology could provide
Environmentally Friendly and Recyclable CuCl2-Mediated C–S Bond Coupling Strategy Using DMEDA as Ligand, Base, and Solvent
作者:Guodong Shen、Xianqiang Huang、Qichao Lu、Zeyou Wang、Weiwei Sun、Yalin Zhang、Manman Sun、Zhiming Wang
DOI:10.1055/a-1561-5508
日期:2022.1
Simple reaction conditions and recyclable reagents are crucial for environmentally friendly industrial applications. An environment-friendly, recyclable and economic strategy was developed to synthesize diaryl chalcogenides by the CuCl2-catalyzed C–S bond-formation reaction via iodobenzenes and benzenethiols/1,2-diphenyldisulfanes using N,N′-dimethylethane-1,2-diamine (DMEDA) as ligand, base, and solvent