scheme29

Scheme 29. Organocatalytic 1,3-dipolar cycloaddition of butyrolactone-derived imino esters 57 and methyleneindolinones 58. This figure is used with permission from the Royal Society of Chemistry[88].
Scheme 29. Organocatalytic 1,3-dipolar cycloaddition of butyrolactone-derived imino esters 57 and methyleneindolinones 58. This figure is used with permission from the Royal Society of Chemistry[88].
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