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
Patterned Surface Derivatization Using Diels–Alder Photoclick Reaction
作者:Selvanathan Arumugam、Vladimir V. Popik
DOI:10.1021/ja205652m
日期:2011.10.5
(oNQM) in the exposed areas. oNQM undergoes very facile hetero Diels-Alder addition (k(D-A) ≈ 4 × 10(4) M(-1)s(-1)) to immobilized vinyl ether molecules resulting in a photochemically stable covalent link between a substrate and a surface. Unreacted oNQM groups are rapidly hydrated to regenerate NQMP. The clickchemistry based on the addition of photochemically generated oNQM to vinyl ether works well