| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5226748 | Tetrahedron | 2009 | 7 Pages |
Abstract
The domino Knoevenagel hetero-Diels–Alder reaction of the O-propargylated salicylaldehydes and 4-hydroxycoumarin leads to pyrano[2,3-c]coumarins 3 and pyrano[2,3-c]chromones 4 in high yield in the presence of CuI as a Lewis acid. In all cases, the reaction was shown to exhibit high regioselectivity and form product 3 as main product.
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Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
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