Stereoselective preparation of Z-1,2-diarylallyl chlorides and the conversion thereof into azolylmethyloxiranes, and novel intermediates

US5268517A · kind A · utility

Assignee

• BASF SE

Inventors

• Reiner Kober · Neheim, DE
• Rainer Seele
• Heinz Isak · Haßloch, DE
• Eckhard Hichmann · Schifferstadt, DE
• Norbert Goetz
• Thomas Zierke · Böhl-Iggelheim, DE

Key dates

• Filing date: Dec 7, 1992
• Grant date: Dec 7, 1993
• Expiry date: Dec 7, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D303/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The preparation of Z-1,2-diarylallyl chlorides of the general formula I ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are hydrogen, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy or a substituted aromatic radical, and n and m are 1, 2 or 3, by dehydrating chlorohydrins of the formula II ##STR2## in which the radicals are as defined above, at up to 50.degree. C. in an inert ether or carboxylic acid ester as solvent and in the presence of a carboxylic anhydride and an organic or inorganic acid, the conversion thereof into azolylmethyloxiranes, and novel intermediates are described.