Henkel Corporation

Thomas J Korte

Eugene G Harris

A Frederick Elsasser

A process for preparing furans of the formula (I) ##STR1## by reacting a furanone of the formula ##STR2## with an organic orthoacid or an orthosilicate in the presence of an acid catalyst at an elevated temperature.

Process for preparing furan compositions

This invention relates to an improved process for the preparation of 3-acyl-5-alkyldihydro-2(3H)-furanones according to the following reaction scheme: ##STR1## wherein R and R.sub.1 are hydrogen or alkyl and R.sub.2 is a hydrocarbon or -O-hydrocarbon radical of from 1 to 20 carbon atoms and X is a leaving group.

Process for the preparation of substituted furanones

A process for preparing a composition of the formula ##STR1## by reacting a composition of the formula ##STR2## with a polyhydric alcohol of the formula HO--X--OH in the presence of an acid catalyst at an elevated temperature to form a ketal of the formula ##STR3## and reacting the ketal of the formula (II) with a monohydric alcohol in the presence of an acid at an elevated temperature to form ##STR4##

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Cincinnati, OH, United States of America

Thomas J Korte