Pd(II)-catalyzed selective sulfenylation of arene C–H bonds using N-arylthiobenzamides as thiolation reagent and oxidant
摘要:
The palladium-catalyzed direct sulfenylation of arenes with N-arylthiobenzamides was developed for the synthesis of aryl sulfides. Additional oxidant was not required for the catalytic cycle because N-arylthiobenzamide was used as both thiolation reagent and oxidant. The selective mono- or di-sulfenylation could be controlled by addition of the amount of N-arylthiobenzamide. Excellent functional group tolerance was observed and thioethers or dithioethers were obtained in good yields. (C) 2015 Elsevier Ltd. All rights reserved.
A catalytic variant of the directthiolation of arenes, bearing directing groups, with disulfides or thiols has been developed under palladium and copper co‐catalysis. Both sulfenyl moieties of the disulfide could be incorporated into the thiolated products, therefore, the reactions reached completion with only half an equivalent of disulfide, with respect to the starting arene. Experimental evidence
在钯和铜的共催化下,开发了带有二价硫或硫醇的带有导向基团的芳烃直接硫醇化的催化变体。二硫化物的两个亚硫基部分都可以结合到硫醇化产物中,因此,相对于起始芳烃,仅用一半当量的二硫化物就可以完成反应。实验证据表明该反应是通过Pd II / Pd IV机制进行的。
Rhodium-Catalyzed Directed Sulfenylation of Arene CH Bonds
作者:Yaxi Yang、Wei Hou、Lihuai Qin、Juanjuan Du、Huijin Feng、Bing Zhou、Yuanchao Li
DOI:10.1002/chem.201303730
日期:2014.1.7
The rhodium‐catalyzed intermolecular directCH thiolation of arenes with aryl and alkyl disulfides was developed for the first time to provide a convenient route to aryl thioethers. This strategy is compatible with many different directing groups and exhibits excellent functional group tolerance. More significantly, mono‐ or dithiolation can be selectively achieved, thus providing a straightforward
Lewis Acid/Brønsted Acid Controlled Pd(II)-Catalyzed Chemodivergent Functionalization of C(<i>sp</i><sup>2</sup>)–H Bonds with <i>N</i>-(Arylthio)i(a)mides
作者:Manthena Chaitanya、Pazhamalai Anbarasan
DOI:10.1021/acs.orglett.8b01281
日期:2018.6.1
C–H bonds have been accomplished employing N-(arylthio)imides in combination with either Brønsted acid or Lewis acid, respectively. Notable features of the developed methodologies include excellent diversity, high functional group tolerance, wide substrate scope, and use of a single N–S reagent. Importantly, the developed hypothesis was also successfully extended to the amidation of C–H bonds. A plausible
The copper-mediated direct thiolation of carbazole derivatives with disulfides via C(sp2)–H bond cleavage was developed for synthesizing diaryl and alkyl aryl sulfides. This reaction exhibits wide tolerance toward various functional groups giving the products in good yields without any additives or ligands, and can be easily extended to the synthesis of thioethers carrying a benzo[h]quinolone, 2-phenylquinoline
铜介导的咔唑衍生物通过C(sp 2)–H键断裂与二硫键直接硫醇化反应,用于合成二芳基和烷基芳基硫醚。该反应显示出对各种官能团的宽容度,从而以高收率获得了产物,而没有任何添加剂或配体,并且可以容易地扩展到以令人满意的收率合成带有苯并[ h ]喹诺酮,2-苯基喹啉或吲哚部分的硫醚。