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Pericyclic umpolung. Reversal of regioselectivity in the diels-alder reaction

✍ Scribed by K.J. Shea; Andrew J. Staab; Kathleen S. Zandi

Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
229 KB
Volume
32
Category
Article
ISSN
0040-4039

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Ab5tract: 4-Ethyl-5-methyl-6-mthylthio-2(H)-pyranone (4) undergoes Dials-Alder reactions with ethyl hexynoate (5). 3-heptyn-2-one (6). ethyl ptopiolate (7). and3-butyn-2-one (8) to afford substituted banzenes with high ragioselectivity upon extrusion of CO2. 4-Ethyl-5.6-dimethyl-( 4-ethyl-3,6-dimeth