The dipolar cycloadducts from diaryl azines and maleimides ((1) under bar, <(20)under bar>) or maleic anhydride (<(18)under bar>) have been reacted with chlorosulfonic acid to give the bis- ((2) under bar, <(19)under bar>) or tetrachlorosulfonyl derivatives (<(21)under bar>). The chorosulfonation generally required addition of thionyl chloride. The various sulfonyl chlorides were converted into a range of sulfonamides ((3) under bar-<(11)under bar>, <(13)under bar>-<(16)under bar>) and the N-butylsulfamate (<(12)under bar>). The N,N-dialkylsulfamonyl cycloadducts (<(23)under bar>, <(25)under bar>) were also obtained by cycloaddition of the bis-dimethylsulfamoyl 2-methoxybenzaldehyde azine (<(22)under bar>) and N-phenyl maleimide or the N-((p) under bar-diethylsulfamoylphenyl) maleimide (<(24)under bar>) with (p) under bar-tolualdehyde azine, although the former reaction did not go to completion.Attempts to carry out the cycloaddition between the two sulfamoyl reactants (<(22)under bar> and <(24)under bar>) were unsuccessful. The various sulfonamide derivatives will be screened as pesticides.
Synthesis of Di- and Tetra-Sulfonated Heterocyclic Compounds by Crisscross Cycloaddition Reactions
作者:Augusto C. Tomé、José A. S. Cavaleiro、Fernando M. J. Domingues、Richard J. Cremlyn
DOI:10.1080/104265090930362
日期:2005.12
Using sulfonated diaryl azines and sulfonated N-arylmaleimides as starting reagents, a range of di- and tetra-sulfonated crisscross cycloadducts were selectively prepared. While the di-sulfonated adducts were obtained by carrying out the cycloaddition reaction in solution, the tetra-sulfonated adducts could be obtained only by fusion of the two reagents in the absence of solvent. The stereoisomers of the sulfonated cycloadducts were separated by preparative TLC.