Acid-catalyzed isomerization of substituted indenes : attempted synthesis of indenylacetone from prop-2-ynylindene
作者:A. J. Hubert、H. Reimlinger
DOI:10.1039/j39690000944
日期:——
substantial quantity of 1-acetonylideneindane (III). The isomerization of the double bond from the five-membered ring of indene to the exo-position is explained in terms of an equilibrium between acetonylindene (II) and 1-acetonylideneindane (III); this isomerization was catalyzed by acids. A similar equilibrium was found in the acid-catalyzedisomerization of 3-benzylindenes C9H7·CH2Ph ⇌ C9H8CHPh.
iridium‐catalyzed asymmetric hydrogenation of unfunctionalized exocyclic C=C bonds was performed by using an axially flexible chiral phosphine–oxazoline ligand, providing the desired chiral 1‐benzyl‐2,3‐dihydro‐1H‐indene products with up to 98 % ee (enantiomeric excess). This represents the first general hydrogenation of unfunctionalized exocyclicolefins with high selectivity reported thus far. The additive
Oxone–acetone mediated Wacker-type oxidation of benzo-fused olefins
作者:Ravindra S. Phatake、Chepuri V. Ramana
DOI:10.1016/j.tetlet.2015.04.102
日期:2015.6
oxone–acetone combination for the Wacker-type oxidation of indenes and dihydronaphthalenes leading, respectively, to indan-2-ones and 2-tetralones. The amount of the base employed in the reaction seems to switch the reaction path from dioxygenation to Wacker-type oxidation. Control experiments suggest that the reaction is not proceeding via the epoxide route and also that there is no role of trace amounts