A convenient synthesis of sulfonamides and sulfonylazidesfromthiols is described. In situ preparation of sulfonyl chlorides fromthiols was accomplished by oxidation with chloramine‐T (=N‐chlorotosylamide=N‐chloro‐4‐methylbenzenesulfonamide), tetrabutylammonium chloride (Bu4NCl), and H2O. The sulfonyl chlorides were then further allowed to react with excess amine or NaN3 in the same pot.
Benzene Sulfonamide Thiazole and Oxazole Compounds
申请人:Adams Jerry Leroy
公开号:US20090298815A1
公开(公告)日:2009-12-03
The present invention provides thiazole sulfonamide and oxazole sulfonamide compounds, compositions containing the same, as well as processes for the preparation and methods for their use as pharmaceutical agents.
Palladium-catalyzed ortho-olefination of 2-arylpyrrolidines: A tool for increasing structural complexity in nitrogen heterocycles
作者:Pablo D. Legarda、Alfonso García-Rubia、Ramón Gómez Arrayás、Juan C. Carretero
DOI:10.1016/j.tet.2018.05.076
日期:2018.7
of the (2-pyridyl)sulfonyl unit as directing functionality and readily removable N-protecting group has enabled an efficient and practical transformation of 2-arylpyrrolidine derivatives into more complex tricyclic frameworks via palladium-catalyzed ortho-olefination with electron deficient alkenes and subsequent cyclization upon N-deprotection under mild conditions. The key cross coupling step in the
Synthesis of Aporphine Analogues via Palladium-Catalyzed Intramolecular Aryl–Aryl Dehydrogenative Coupling
作者:Chen Su、Wen-Hua Xu、Rui-Li Guo、Xing-Long Zhang、Xue-Qing Zhu、Ya-Ru Gao、Yong-Qiang Wang
DOI:10.1021/acs.joc.1c01649
日期:2021.10.1
Reported herein is an intramolecular dehydrogenative coupling of two inert aryl C–H bonds for the synthesis of aporphine analogues. The process represents a novel tool for the preparation of aporphines via palladiun-catalyzed C–H bond activation. The present reaction is compatible with various functional groups, and the coupling products have been further applied for the synthesis of natural products
A simple and highly effective oxidative chlorination protocol for the preparation of arenesulfonyl chlorides
作者:Yu-Ming Pu、Alan Christesen、Yi-Yin Ku
DOI:10.1016/j.tetlet.2009.11.047
日期:2010.1
suitable for many types of sulfur substrates (thiols, disulfides, and benzylic sulfides). The overall process is simple, practical, and it provides convenient access to a variety of aryl or heteroarylsulfonyl chlorides. The mild reaction conditions and the broad substrate scope render this method attractive and complementary to existing syntheses of aryl or heteroarylsulfonyl chlorides.