Several of N‐sulfonylformamidines were synthesized in one‐pot using easily available sulfonyl chlorides, sodium azide and tertiary/secondary amines in the presence of 5 mol‐% CuBr2 in DCE under aerobic oxidative conditions.
CuCl/CCl<sub>4</sub>-Promoted Convenient Synthesis of Sulfonyl Amidines from Tertiary Amines and Sulfonyl Azides
作者:Xiaoliang Xu、Zhichuang Ge、Dongping Cheng、Lei Ma、Chunshan Lu、Qunfeng Zhang、Nan Yao、Xiaonian Li
DOI:10.1021/ol1000236
日期:2010.3.5
Promoted by CuCl/CCl4, a variety of sulfonyl azides and tertiary amines were successfully coupled to give sulfonyl amidine derivatives in good to excellent yields. A possible mechanism for this reaction is discussed.
An Unexpected Diethyl Azodicarboxylate-Promoted Dehydrogenation of Tertiaryamine and Tandem Reaction with Sulfonyl Azide
It is shown here for the first time that diethyl azodicarboxylate promotes dehydrogenation of tertiaryamines to afford enamines, which subsequently take place in tandem reactions with sulfonyl azides to give the N-sulfonyl amidine derivatives. A number of different substituted tertiaryamines and sulfonyl azides can successfully be coupled, and several functionalized groups are tolerated in this system. The reaction described here is mild, general, and efficient, thus providing an extremely preferable method for synthesis of a variety of N-sulfonyl amidine derivatives.
Visible-light enabled room-temperature dealkylative imidation of secondary and tertiary amines promoted by aerobic ruthenium catalysis
作者:Dong Yang、Jingqi Shi、Jiaming Chen、Xiaoqi Jia、Cuiying Shi、Lifang Ma、Ziyuan Li
DOI:10.1039/d0ra10517a
日期:——
sulfonyl azide as a nitrogen donor, a visible-light-enabled aerobic dealkylative imidation of tertiary and secondary amines involving C(sp3)–C(sp3) bond cleavage with moderate to excellent yields at room temperature is described. It has been demonstrated that this imidation could take place spontaneously upon visible-light irradiation, and could be facilitated considerably by a ruthenium photocatalyst