Addition de carbanions α benchrotreniques sur divers aldehydes non enolisables; evolution des produits primaires d'addition par oxydation d'oppenauer-woodward, influence de la substitution
作者:M.-C. Senechal-Tocquer、D. Senechal、J.-Y. Le Bihan、D. Gentric、B. Caro
DOI:10.1016/0022-328x(87)80307-8
日期:1987.4
Aromatic hydrocarbons complexed with a Cr(CO)3 unit react with benzaldehydes and furfural in THF and in the presence of t-BuOK at the benzylic position to give condensation products in good yields. Formation of ketones by “in situ Oppenauer-Woodward” oxidation is observed. Influence of ring substituents on this formation is discussed.
Tuning Reactivity and Site Selectivity of Simple Arenes in C–H Activation: Ortho-Arylation of Anisoles via Arene–Metal π-Complexation
作者:Paolo Ricci、Katrina Krämer、Igor Larrosa
DOI:10.1021/ja510260j
日期:2014.12.31
Current approaches to achieve siteselectivity in the C–H activation of arenes involve the use of directing groups or highly electron-poor arenes. In contrast, simple arenes, such as anisole, are characterized by poor reactivity and selectivity. We report that π-complexation to a Cr(CO)3 unit enhances the reactivity of anisoles providing an unprecedented ortho-selective arylation. This mild methodology