One-Step Multigram-Scale Biomimetic Synthesis of Psiguadial B
作者:Christopher G. Newton、Duc N. Tran、Matthew D. Wodrich、Nicolai Cramer
DOI:10.1002/anie.201708333
日期:2017.10.23
A gram‐scale synthesis of psiguadial B, a purported inhibitor of human hepatoma cell growth, has been achieved in onestep by a biomimetic three‐component coupling of caryophyllene, benzaldehyde, and diformylphloroglucinol. This cascade reaction is catalyzed by N,N′‐dimethylethylenediamine, and proceeds at ambient temperature to generate four stereocenters, two rings, one C−O bond, and three C−C bonds
report a novel bioorthogonal reaction that hinges on a bridgehead alkene (BHA)-enabled inverse-electron-demand Diels–Alder (IEDDA) cycloaddition. Readilyaccessible from natural product β-caryophyllene, the strained BHA displays high reactivity toward the IEDDA reaction while maintaining excellent biocompatibility. The developed IEDDA reaction has been applied to in vitro protein labeling and pretargeted