A new reaction: A ruthenium-catalyzed transfer of an alkyl group from a trialkylamine to the α-carbon atom of a ketone leads in good yields to α-alkylated ketones [Eq. (1)]. The reaction is applicable to a wide range of alkyl(alkyl), alkyl(aryl), and cyclic ketones, and in the case of unsymmetrical ketones it takes place regioselectively at the less hindered α-position.
Maillard et al., Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1957, vol. 245, p. 185,187
作者:Maillard et al.
DOI:——
日期:——
Indanones and Indenols from 2-Alkylcinnamaldehydes via the Intramolecular Friedel−Crafts Reaction of Geminal Diacetates
作者:Gary B. Womack、John G. Angeles、Vincent E. Fanelli、Brinda Indradas、Roger L. Snowden、Philippe Sonnay
DOI:10.1021/jo900910b
日期:2009.8.7
When treated with Ac(2)O at rt in the presence of 4-6 mol% FeCl(3), 2-alkylcinnamaldehydes are converted to 2-alkyl-1H-inden-1-yl acetates through the intermediacy of gemdiacetates. Methanolysis of the indenyl acetates yields the corresponding indenols, Saponification yields 2-alkylindanones, providing, in effect, an intramolecular acylation employing catalytic levels of acid.
Transition-Metal-Free C–H Hydroxylation of Carbonyl Compounds
作者:Moreshwar B. Chaudhari、Yogesh Sutar、Shreyas Malpathak、Anirban Hazra、Boopathy Gnanaprakasam
DOI:10.1021/acs.orglett.7b01616
日期:2017.7.7
and reductant free α-C(sp3)–H hydroxylation of carbonyl compounds are reported. This method is promoted by commercially available inexpensive KO-t-Bu and atmospheric air as an oxidant at room temperature. This unified strategy is also very facile for hydroxylation of various carbonyl compound derivatives to obtain quaternary hydroxyl compounds in excellent yield. A preliminary mechanistic investigation