Abstract
AbstractThe carboxypolystyrene‐bound vinyl ether of 1,4‐butanediol smoothly underwent an efficient endo‐selective hetero‐Diels−Alder reaction, under Lewis‐acid conditions, with heterodienes bearing methyl ester, trifluoromethyl and para‐tolylsulfinylmethyl groups at the C‐2 position. Reductive cleavage of the supported adducts afforded functionalized dihydropyrans, which are of particular interest for diversity‐oriented parallel synthesis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
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