Cyclic ethers have been effectively synthesized via the intramolecular cyclization of diols using trimethyl phosphate and NaH. The present cyclization could proceed at room temperature to produce 5–7 membered cyclic ethers in good to excellent yields. Substrates possessing a chiral secondary hydroxy group were transformed into the corresponding chiral cyclic ethers along with the retention of their
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.
Fe(III)‐Catalyzed Aerobic Oxidation of 1,4‐Diols<sup>†</sup>
作者:Junlin Li、Jinxian Liu、Chunling Fu、Shengming Ma
DOI:10.1002/cjoc.202200768
日期:2023.8.15
Aerobic oxidation has been catching more and more attention because of its atom economy and environmental friendliness. Oxidation of diols is a challenge due to various oxidative products. Thus, highly selective aerobic oxidation affording specific products is of current interest. In this work, a combination of Fe(NO3)3·9H2O/TEMPO/KCl catalysis has been identified as an efficient recipe for the aerobic