Light-Induced Hetero-Diels−Alder Cycloaddition: A Facile and Selective Photoclick Reaction
作者:Selvanathan Arumugam、Vladimir V. Popik
DOI:10.1021/ja200356f
日期:2011.4.13
(k(D-A)∼ 4×10(4) M(-1) s(-1)) to electron-rich polarized olefins in an aqueous solution. The resulting photostable benzo[g]chromans are produced in high to quantitative yield. The unreacted oNQM is rapidly hydrated (k(H2O) ∼145 s(-1)) to regenerate the starting diol. This competition between hydration and cycloaddition makes oNQMs highly selective, since only vinyl ethers and enamines are reactive enough