Functionalization of activated methylene C–H bonds with nitroarenes and sulfur for the synthesis of thioamides
作者:Nhan T. Do、Khoa M. Tran、Hao T. Phan、Tuong A. To、Tung T. Nguyen、Nam T. S. Phan
DOI:10.1039/c9ob01751h
日期:——
Synthesis of arylthioamides from nitroarenes is reported for the first time. Phenylacetic acids or benzyl alcohols could be used as benzyl synthons.
首次报道了从硝基芳烃合成芳基硫酰胺的方法。可以使用苯乙酸或苯甲醇作为苯甲基合成子。
Use of Molecular Oxygen as a Reoxidant in the Synthesis of 2-Substituted Benzothiazoles via Palladium-Catalyzed CH Functionalization/Intramolecular CS Bond Formation
作者:Kiyofumi Inamoto、Chisa Hasegawa、Junpei Kawasaki、Kou Hiroya、Takayuki Doi
DOI:10.1002/adsc.201000604
日期:2010.10.4
Molecularoxygen (O2) was successfully employed as a reoxidant in cyclizations of thiobenzanilides 1a–s through a palladium-catalyzed CH functionalization/intramolecular CS bondformation process, leading to an efficient, green method for the synthesis of 2-arylbenzothiazoles 2a–s. Addition of cesium fluoride (CsF) greatly enhanced the reactions, which produced variously substituted 2-arylbenzothiazoles
Palladium-Catalyzed C-H Cyclization in Water: A Milder Route to 2-Arylbenzothiazoles
作者:Kiyofumi Inamoto、Yoshinori Kondo、Kanako Nozawa
DOI:10.1055/s-0031-1291164
日期:2012.7
medium in palladium-catalyzed C–H cyclization of thiobenzanilides. Reactions efficiently proceeded under considerably mild conditions such as 40 °C in water, providing a more practical, greener method for the synthesis of 2-arylbenzothiazoles. For somesubstrates, the addition of an amphiphilic surfactant greatly enhanced the process. The method represents a rare example of palladium-catalyzed C–H functionalization
在钯催化的硫代苯甲酰苯胺的 C-H 环化中,水被成功用作反应介质。反应在相当温和的条件下有效进行,例如在 40 °C 的水中,为合成 2-芳基苯并噻唑提供了一种更实用、更环保的方法。对于某些基材,添加两亲性表面活性剂大大增强了该过程。该方法代表了在水中进行钯催化的 C-H 功能化过程的一个罕见例子。
Sulfated tungstate: An efficient catalyst for synthesis of thioamides via Kindler reaction
作者:Sagar P. Pathare、Pramod S. Chaudhari、Krishnacharya G. Akamanchi
DOI:10.1016/j.apcata.2012.03.012
日期:2012.5
New application of sulfated tungstate, a mildly acidic solid inorganic acid, as reusable heterogeneouscatalyst for efficient Kindler reaction, a three component reactions of aldehydes, amines and sulfur, for synthesis of thioamides is discussed.
Sulfur‐Catalyzed Oxidative Coupling of Dibenzyl Disulfides with Amines: Access to Thioamides and Aza Heterocycles
作者:Thanh Binh Nguyen、Le Phuong Anh Nguyen、Thi Thu Tram Nguyen
DOI:10.1002/adsc.201801695
日期:2019.4.16
In the presence of catalytic amounts of elemental sulfur, dibenzyl disulfide/DMSO was found to be an excellent thiobenzoylating agent of amines to provide a wide range of thioamides. The reaction becomes autocatalytic when anilines substituted by an o‐cyclizable group were used as nucleophile, leading to the corresponding 2‐aryl aza heterocycles.