New Cross Aldol Reactions. Titanium Tetrachloride-promoted Reactions of Silyl Enol Ethers with Carbonyl Compounds Containing A Functional Group
作者:Kazuo Banno
DOI:10.1246/bcsj.49.2284
日期:1976.8
It was found that, in the presence of titanium tetrachloride, silylenolethersselectively react with aldehyde or ketone function of various carbonyl compounds containing another functional group giving the corresponding cross aldols in good yields. The present cross aldol reaction was successfully applied to the synthesis of arturmerone, one of the volatile principles of turmeric oil.
Aldol-Type Reaction of<i>α</i>-Halo Ketones with<i>α</i>-Ketocarboxylates Mediated by SmI<sub>2</sub>or SmI<sub>3</sub>: Facile Synthesis of<i>α</i>-Hydroxy-<i>γ</i>-ketocarboxylates
作者:Tsutomu Arime、Naoki Kato、Fumio Komadate、Hiroko Saegusa、Nobuo Mori
DOI:10.1080/00397919408010255
日期:1994.12
Abstract The title reaction smoothly proceeds at room temperature to give α-hydroxy-γ-keto esters 3 in good yields, probably via a mechanism involving samarium enolates formed in situ from α-halo ketones.