Cu(<scp>i</scp>) catalysed annulation of isothiocyanates/isocyanates with 2-iodo-sulfonamides: synthesis of benzodithiazines, benzothiadiazinones, benzothiazinylidene-anilines and benzothiazolylidene-anilines
作者:K. Sandeep、Alla Siva Reddy、K. C. Kumara Swamy
DOI:10.1039/c9ob00994a
日期:——
Cu(i)-catalysed cyclisationreaction of 2-iodobenzene sulfonamides with aryl-isothiocyanates and isocyanates that affords functionalised benzodithiazines and benzothiadiazinones, respectively, has been developed. Thus, in the reaction with aryl isothiocyanates (Ar-N[double bond, length as m-dash]C[double bond, length as m-dash]S), the C[double bond, length as m-dash]S moiety participates in the cyclisation leading
Synthesis of Polycyclic Sultams by Palladium-Catalyzed Intramolecular Cyclization
作者:K. Majumdar、Shovan Mondal、Nirupam De
DOI:10.1055/s-0029-1216888
日期:2009.9
1-naphthylamine, and 2-halobenzyl bromides is reported. A variety of tricyclic, tetracyclic, and pentacyclic sultams have been prepared via palladium-catalyzed, ligand-free intramolecularcyclization. Detailed mechanistic studies of the reaction pathway are also described. cyclization - palladium acetate - sulfonamides - sultams