A palladium-catalyzed reaction for the synthesis of benzosultams from allenes and
2-iodobenzenesulfonamides in poly(ethylene glycol) medium is described. This route
is compared with a second method involving an internal Heck reaction of alkene-functionalized
2-iodobenzenesulfonamides. Key products were characterized by single-crystal X-ray
crystallography.
Key words
palladium - catalysis - allenes - sulfonamides - green chemistry