Process for preparing alkoxytriazolinones

US5917050A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Conrad · Wuppertal, DE
• Reinhard Lantzsch · Leverkusen, DE
• Vijay C. Desai · Shawnee, US
• Shekhar V. Kulkarni · Overland Park, US

Key dates

• Filing date: Feb 11, 1998
• Grant date: Jun 29, 1999
• Expiry date: Feb 11, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D249/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Alkoxytriazolinones of the formula (I) known for example as intermediates for preparing agrochemically active compounds! ##STR1## wherein R represents an alkyl group, an alkenyl group, an alkinyl group, a cycloalkyl group, a cycloalkylalkyl group, an aryl group or an arylalkyl group, any of which may be substituted, are prepared by reacting PA1 a) thioimidodicarboxylic diesters of the general formula (II) ##STR2## wherein R is as defined above and R.sup.1 represents an alkyl group, an arylalkyl group or an aryl group, any of which may be substituted, with PA1 b) hydrazine, hydrazine hydrate or an acid adduct of hydrazine. The reaction is conducted i) in the presence of a diluent and, optionally, in the presence of a basic reaction auxiliary, and ii) at temperatures between -10.degree. C. and +100.degree. C.