scheme32

Scheme 32. Organocatalytic domino 1,3-dipolar cycloaddition of butyrolactone-derived cyclic imino esters 57 and carboxylic acid-activated chromones 64. This figure is used with permission from Georg Thieme Verlag[91].
Scheme 32. Organocatalytic domino 1,3-dipolar cycloaddition of butyrolactone-derived cyclic imino esters 57 and carboxylic acid-activated chromones 64. This figure is used with permission from Georg Thieme Verlag[91].
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