Synthesis of N-Sulfonyl Amidines and Acyl Sulfonyl Ureas from Sulfonyl Azides, Carbon Monoxide, and Amides
作者:Shiao Y. Chow、Luke R. Odell
DOI:10.1021/acs.joc.6b02894
日期:2017.3.3
A Pd-catalyzed and ligand-free carbonylation/cycloaddition/decarboxylation cascade synthesis of sulfonyl amidines from sulfonyl azides and substituted amides at low CO pressure is reported. The reaction proceeds via an initial Pd-catalyzed carbonylative generation of sulfonyl isocyanates from sulfonyl azides, followed by a [2 + 2] cycloaddition with amides and subsequent decarboxylation, which liberates
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.