Preparation of .alpha.,.alpha.-dialkoxy ketones

US5159117A · kind A · utility

Assignee

• BASF SE

Inventors

• Guenter Wegner · Ludwigshafen am Rhein, DE
• Stefan Karbach · Ludwigshafen, DE
• Hubert Smuda · Heidelberg, DE
• Eckhard Hickmann · Schifferstadt, DE
• Reiner Kober · Neheim, DE
• Rainer Seele
• Thomas Zierke · Böhl-Iggelheim, DE

Key dates

• Filing date: Aug 20, 1991
• Grant date: Oct 27, 1992
• Expiry date: Aug 20, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D307/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing .alpha.,.alpha.-dialkoxy ketones of the formula I ##STR1## where R.sup.1 and R.sup.2 are each, independently of one another, hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.3 -C.sub.20 -cycloalkyl, C.sub.4 -C.sub.30 -cycloalkylakyl, C.sub.9 -C.sub.30 -alkylcycloalkyl, unsubstituted or C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy-, halogen-, C.sub.1 -C.sub.4 -haloalkyl-, C.sub.1 -C.sub.4 -haloalkoxy-, phenyl-, phenoxy-, halophenyl-, halophenoxy- and/or cyano-substituted aryl, C.sub.7 -C.sub.20 -aralkyl or heterocyclyl, PA1 R.sup.2 is also ##STR2## R.sup.3 and R.sup.4 are each, independently of one another, C.sub.1 -C.sub.20 -alkyl, C.sub.3 -C.sub.20 -cycloalkyl, aryl, C.sub.7 -C.sub.20 -arylalkyl, or together are an unsubstituted or C.sub.1-C.sub.4 -alkyl- substituted C.sub.2 -C.sub.7 -alkylene chain and PA1 R.sup.5 is R.sup.1 or together with R.sup.1 is an unsubstituted or C.sub.1 -C.sub.4 -alkyl-substituted C.sub.2 -C.sub.7 -alkylene chain, which entails reacting ketones or aldehydes of the formula II ##STR3## with nitrites of the formula III EQU R.sup.3/4 --(NO.sub.2).sub.n (III) where n is 1 or 2, and n is 2 when R.sup.3 and R.sup.4 together are an unsubst…