Benzocrown ether compounds containing a sulfone moiety have been prepared using Rongalite. The resulting sulfones were employed as diene equivalents (o-quinodimethane) for the synthesis of various annulated benzocrown ethers using the Diels-Alder strategy.
benzocrown ethers - benzoannulation - chromophores - sulfones - Diels-Alder reaction - diversity oriented synthesis - Rongalite