scheme6

Scheme 6. Organocatalytic tandem reaction of pyrazolone-chromone 4C synthons 11 with benzolactone-derived olefins 1. This figure is used with permission from the Royal Society of Chemistry[44].
Scheme 6. Organocatalytic tandem reaction of pyrazolone-chromone 4C synthons 11 with benzolactone-derived olefins 1. This figure is used with permission from the Royal Society of Chemistry[44].
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