Synthesis of cis-β-Amidevinyl Benziodoxolones from the Ethynyl Benziodoxolone–Chloroform Complex and Sulfonamides

2019 
The synthesis of cis-β-amidevinyl benziodoxolones from the ethynyl benziodoxolone–chloroform complex and sulfonamides is reported. Evidence indicates that highly reactive unsubstituted ethynyl benziodoxolone undergoes Michael addition of sulfonamides, including sterically demanding acyclic amino acid derivatives. The synthesis of selectively deuterated cis-β-amidevinyl benziodoxolones and investigation of ethynyl-λ3-iodane reactivity are also described.
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