Abstract
An efficient catalyst-free, diastereosective synthesis of novel hexahydro-chromene and tetrahydro-pyrano[2,3- d]pyrimidine-annulated benzo- δ-sultones is described. A number of 2-formyl-4-phenyl ( E)-2-phenylethenesulfonates were synthesized and underwent a one-pot domino Knöevenagel-hetero-Diels–Alder reaction, respectively, with dimedone and N, N-dimethylbarbituric acid in water, affording the desired products in moderate to excellent yields.
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