Method for producing 3-phenyl(thio)uracils and 3-phenyldithiouracils

US7737275B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gerhard Hamprecht · Weinheim, DE
• Michael Puhl · Hirschberg, DE
• Bernd Wolf · Niederkirchen, DE
• Michael Keil · Freinsheim, DE
• Robert Reinhard · Schifferstadt, DE
• Werner Seitz · Plankstadt, DE
• Guido Mayer · Neheim, DE

Key dates

• Filing date: Dec 1, 2004
• Grant date: Jun 15, 2010
• Expiry date: Apr 10, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D239/56
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is described for preparing 3-phenyl(thio)uracils or 3-phenyldithiouracils of the formula I, by reacting a phenyl iso(thio)cyanate of the formula II with an enamine of the formula III and, if appropriate, in a further step, the resulting 3-phenyl(thio)uracil or 3-phenyldithiouracil of the formula I where R1=R1a, when R1=hydrogen, is reacted with an aminating agent of the formula IV to give 3-phenyl(thio)uracils or 3-phenyldithiouracils of the formula I where R1=aminowhere the variables R1, R1a, R2, R3, R4, X1, X2, X3, Ar, A and L1 are each as defined in claim 1.