High turnover: An highlyefficientcatalyticasymmetrichydrogenation of δ‐aryl‐δ‐ketoesters has been realized by using the chiral spiroiridium catalyst (R)‐1. Chiral 1,5‐diol products are obtained with excellent enantioselectivity and turnover numbers (TONs) as high as 100 000. TOF=turnover frequency.
Hydroxyarylketones via Ring-Opening of Lactones with Aryllithium Reagents: An Expedient Synthesis of (±)-Anabasamine
作者:Mark Trudell、Lei Miao、Stassi DiMaggio
DOI:10.1055/s-0029-1217047
日期:2010.1
The regioselective ring-opening of lactones (δ-valerolactone and γ-butyrolactone) with aryllithium reagents is reported for the construction of a series of δ-hydroxy aryl ketones and γ-hydroxy aryl ketones. Application of this method for the expeditious syntheses of (±)-anabasamine and its nicotine-related analogue are also described.