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。
Synthesis of 2,2′‐Bi‐<i>2H</i>‐3,3′‐diaryl‐1,4‐benzothiazines from α,α‐Dibromoacetophenones and <i>o</i>‐Aminothiophenol