Abstract
The sequential reaction between α-bromo ketones and glyoxalhydrates leads to 2,4,5-triacyl-1,3-dioxolanes. The reactions arepromoted by a combination of triethylamine and lithium bromide,and a plausible mechanism is proposed. The reaction presumably proceedsvia the condensation of glyoxal hydrates, the Williamson reactionand a cyclization sequentially. The reaction conditions are mildand operationally simple. Although the yields of the reactions aremoderate, the products are formed stereoselectively.
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