The stereochemistry of diels-alder react
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Yitzhak Apeloig; Dorit Arad; Moshe Kapon; Mercedes Wallerstein
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Article
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1987
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Elsevier Science
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French
β 302 KB
The stereochemistry of the Diels-Alder reactions of 3 cyclopropenes was determined unequivocally by X-ray and NOE studies. Tetrachlorocyclopropene yields exo-adducts with (r)-l-R-1,3-butadiene (R=OCH3, OCOCH3, OSiMe ), with 1,4\_diphenylbutadieKand with furan. 1,2-bromochlorocyclopropene yields with