Benzyl alcohols and their lower alkanecarboxylic acid esters

US5151548A · kind A · utility

Assignee

• BASF SE

Inventors

• Dieter Hermeling · Haßloch, DE
• Dieter Degner · Schifferstadt, DE
• Albrecht Harreus · Ludwigshafen, DE
• Norbert Goetz
• Jochen Wild · Ruppertsberg, DE
• Hans Theobald · Schifferstadt, DE
• Bernd Wolf · Niederkirchen, DE

Key dates

• Filing date: Jun 12, 1989
• Grant date: Sep 29, 1992
• Expiry date: Jun 12, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C33/50
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Benzene derivatives of the general formula ##STR1## where Hal is halogen, R.sup.1 is a hydrocarbon radical of 1 to 18 carbon atoms, R.sup.2 is hydrogen or alkyl of 1 to 6 carbon atoms and X is hydrogen or halogen, are prepared by a process in which a toluene derivative of the general formula ##STR2## is electrochemically oxidized in the presence of an acid of the formula R.sup.2 --COOH (III). Novel benzene derivatives of the general formula ##STR3## where R.sup.3 is hydrogen or an R.sup.2 --CO-- radical but R.sup.1 cannot be methyl if X is hydrogen, and of the general formula ##STR4## where R.sup.4 is a branched or cyclic alkyl radical of 3 to 12 carbon atoms, but R.sup.4 cannot be isopropyl if X is hydrogen. The compounds of formulas IV and VI are intermediates for crop protecting agents, e.g. pyrethroids.