Process for preparing alpha-oxo-esters
AssigneeSnamprogetti S.p.A.
InventorsLuciano Re, Alberto Brandt, Luciano Bassignani
Life of this patent
Estimating the term…
Abstract
An operationally simple and economical process for preparing alpha-oxoesters is provided by reacting an acetylenic compound of formula R--C.tbd.C--OR' with an oxidizing mixture composed of osmium tetroxide and an alkaline or alkaline earth chlorate and recovering the osmium tetroxide at the end of the reaction.
Claims10
A process for preparing alpha-oxoesters corresponding to the general formula ##STR2## in which R and R.sup.1, the same or different, may be alkyl, aryl, arylalkyl or cycloalkyl groups, and in addition R may be hydrogen, consisting of reacting an acetylenic compound of the formula
- R--C.uparw.C--OR'
- wherein R and R.sup.1 are the same as hereinabove defined, with a mixture of osmium tetroxide and an alkali metal or alkaline earth metal chlorate in the liquid phase at a temperature of about 0.degree. C. to about 100.degree. C. and thereafter recovering the product.
A process for preparing alpha-oxoesters of the formula ##STR3## in which R and R.sup.1 are the same or different and are selected from alkyl, aryl, arylalkyl or cycloalkyl groups and in addition R may be hydrogen, said process comprising oxidizing an acetylenic compound of the formula R--C.uparw.COR' wherein R and R.sup.1 are the same as hereinabove defined, with a mixture of osmium tetroxide and an alkali metal or alkaline earth metal chlorate in the liquid phase at a temperature of 0.degree.-100.degree. C. and a pH of 5.5 to 7.5.
Dependencies are inferred from the claim text.