Kraus GA, Cui W. Diels-Alder reactions of quinol lactones: a change of regioselectivity with stannic chloride catalysis.
J Org Chem 2002;
67:9475-6. [PMID:
12492359 DOI:
10.1021/jo020366p]
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Abstract
Lewis acid-mediated Diels-Alder reactions of quinol lactone 2 gave regioselectivity opposite to that of the uncatalyzed reaction. Compound 12 is proposed as the reactive intermediate generated by the reaction of 2 with stannic chloride.
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