scheme21

Scheme 21. Organocatalyzed tandem reaction of benzolactone-chromone 4C synthons 42 with benzolactone-derived olefins 1. This figure is used with permission from Elsevier[64].
Scheme 21. Organocatalyzed tandem reaction of benzolactone-chromone 4C synthons 42 with benzolactone-derived olefins 1. This figure is used with permission from Elsevier[64].
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