Process for making 3,4,5,6-tetrahydrophthalimide derivatives

US5324843A · kind A · utility

Assignee

• BASF SE

Inventors

• Lothar Rueb · Speyer, DE
• Karl Eicken · Monsheim, DE
• Bernd Schaefer · Dierbach, DE
• Gernot Reissenweber · Haßloch, DE
• Peter Schaefer · Bad Dürkheim, DE

Key dates

• Filing date: Apr 29, 1993
• Grant date: Jun 28, 1994
• Expiry date: Apr 29, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D209/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

3-(3,4,5,6-tetrahydrophthalimido)cinnamic esters I ##STR1## (R.sup.1 =H, halogen; R.sup.2, R.sup.3 =halogen; R.sup.4 =C-organic radical, R.sup.5 =H, CH.sub.3) are prepared by reducing 3-nitrocinnamic esters II ##STR2## with hydrogen in the presence of a catalyst and condensing the resulting 3-aminocinnamic esters III ##STR3## with a 3,4,5,6-tetrahydrophthalic anhydride IV ##STR4## and are valuable active ingredients in crop protection.