Oxidative Debenzylation of N-Benzyl Amides and O-Benzyl Ethers Using Alkali Metal Bromide
摘要:
The oxidative debenzylation of N-benzyl amides and O-benzyl ethers was promoted with high efficiency by a bromo radical formed through the oxidation of bromide from alkali metal bromide under mild conditions. This reaction provided the corresponding amides from N-benzyl amides and carbonyl compounds from O-benzyl ethers in high yields.
Expedient Synthesis of Sulfinamides from Sulfonyl Chlorides
作者:Michael Harmata、Pinguan Zheng、Chaofeng Huang、Maria G. Gomes、Weijiang Ying、Kanok-On Ranyanil、Gayatri Balan、Nathan L. Calkins
DOI:10.1021/jo062296i
日期:2007.1.1
Sulfinamides were synthesized fromsulfonylchlorides using a procedure involving in situ reduction of sulfonylchlorides. The reaction is broad in scope and easy to perform.
使用涉及原位还原磺酰氯的方法,由磺酰氯合成亚磺酰胺。该反应范围广且易于进行。
PTAB mediated open air synthesis of sulfonamides, thiosulfonates and symmetrical disulfanes
作者:Debayan Sarkar、Manoj Kumar Ghosh、Nilendri Rout
DOI:10.1016/j.tetlet.2018.05.017
日期:2018.6
A facile methodology has been described which has successfully simplified the generation of sulfonamides, thiosulfonates and symmetric disulfanes. This “trio” of reactions occur in an open air metal free atmosphere and has also been scaled up to grams making it suitable for commercialization. The reactions also have been successfully carried out with asymmetric variants, thus contributing to the chiral
Sulfonamide Synthesis through Electrochemical Oxidative Coupling of Amines and Thiols
作者:Gabriele Laudadio、Efstathios Barmpoutsis、Christiane Schotten、Lisa Struik、Sebastian Govaerts、Duncan L. Browne、Timothy Noël
DOI:10.1021/jacs.9b02266
日期:2019.4.10
continuous development of novel and efficient synthetic methods to access these functional groups. Herein, we report an environmentally benign electrochemical method which enables the oxidative coupling between thiols and amines, two readily available and inexpensive commodity chemicals. The transformation is completely driven by electricity, does not require any sacrificial reagent or additional catalysts
One-Pot Synthesis of Sulfonamides from Sodium Sulfinates and Amines via Sulfonyl Bromides
作者:Jie Yan、Sixue Wu、Yikun Zhang、Min Zhu
DOI:10.1055/s-0036-1588298
日期:——
a new and convenient procedure has been developed for the preparation of sulfonamides from sodium sulfinates and amines with ( n -C 4 H 9 ) 4 NBr as bromine source and m -chloroperbenzoic acid as oxidant. This S–N bond formation reaction proceeds efficiently via sulfonyl bromides under neutral conditions to afford the corresponding sulfonamides in good yields at room temperature.
Synthesis of sulfonamides promoted by alkyl iodide via a hypervalent iodine intermediate
作者:Zhongshi Zhou、Xuehan He
DOI:10.1080/10426507.2019.1686378
日期:2020.4.2
amount of m-chloroperbenzoicacid as oxidant and a catalytic amount of 1-iodopropane provides the corresponding sulfonamides in good yields under mild reaction conditions. In this protocol, 1-iodopropane is first oxidized by m-chloroperbenzoicacid into the corresponding hypervalent iodine intermediate iodosylpropane, which is highly unstable and decomposes at once to form hypoiodous acid. Then, the