A sterically encumbered photoredox catalyst enables the unified synthesis of the classical lignan family of natural products
作者:Edwin Alfonzo、Aaron B. Beeler
DOI:10.1039/c9sc02682g
日期:——
selectively generate carbonyl ylides from electron-rich epoxides. These can undergo concerted [3 + 2] dipolarcycloadditions to afford tetrahydrofurans, which were advanced (2–4 steps) to at least one representative natural product or natural product scaffold within all six subtypes in classical lignans. The application of those synthetic blueprints to the synthesis of heterolignans bearing unnatural