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Intramolecular Diels-Alder Reactions of Sorbyl Citraconate and Mesaconate Esters
White, James D.,Sheldon, Bernard G.
, p. 2273 - 2280 (1981)
The intramolecular Diels-Alder reaction of 21, prepared from citraconic anhydride and sorbyl alcohol, gave 23, whereas the esters 29 and 32 produced trans-fused adducts 30 and 33, respectively.These were isomerized in base to 31 and 34.The (E)-citraconate
