Bayer Corporation

Bayer Aktiengesellschaft

Shekhar V Kulkarni

Vijay C Desai

Vidyanatha A Prasad

Eric Rivadeneira

Reinhard Lantzsch

Klaus Jelich

Michael Conrad

The present invention relates to a process for manufacturing substituted triazolinones, which are intermediates in the preparation of herbicidally active compounds. In particular, this invention relates to the alkylation of a non-alkylated triazolinone intermediate product, wherein the improvement comprises conducting the alkylation reaction under pH controlled conditions. In a preferred embodiment, the invention relates to the preparation of a 5-alkoxy(or aryloxy)-2,4-dihydro-3H-1,2,4-triazol-3-one, and the alkylation of this non-alkylated triazolinone intermediate product, to produce a 5-alkoxy(or aryloxy)-4-alkyl-2,4-dihydro-3H-1,2,4-triazol-3-one.

Process for the manufacture of substituted triazolinones

The present invention provides a process for making N-alkoxy(or aryloxy)carbonyl isothiocyanate derivatives by reacting a chloroformate with a thiocyanate, in the presence of an aqueous solvent and a catalytic amount of a N,N-dialkylarylamine, to produce a N-alkoxy(or aryloxy)carbonyl isothiocyanate intermediate product, wherein the intermediate product is converted to a N-alkoxy(or aryloxy)carbonyl isothiocyanate derivative in high yield and purity.

Process for manufacture of N-alkoxy(or aryloxy)carbonyl isothiocyanate derivatives in the presence of N,N-dialkylarylamine catalyst and aqueous solvent

The present invention relates to a process for manufacturing sulfonylaminocarbonyl triazolinones and salts thereof, which are herbicidally active compounds, wherein the process does not require isolation of the intermediate product. In particular, this invention relates to the conversion of a substituted triazolinone to a sulfonylaminocarbonyl triazolinone, and without the isolation of this intermediate product, the sulfonylaminocarbonyl triazolinone is then converted to a salt thereof.

Process for the manufacture of sulfonylaminocarbonyl triazolinones and

The present invention provides a process for making N-alkoxy(or aryloxy)carbonyl isothiocyanate derivatives by reacting a chloroformate with a thiocyanate, in the presence of an organic solvent and a catalytic amount of a N,N-dialkylarylamine, to produce a N-alkoxy(or aryloxy)carbonyl isothiocyanate intermediate product, wherein the intermediate product is converted to a N-alkoxy(or aryloxy)carbonyl isothiocyanate derivative in high yield and purity.

Process for manufacturing N-alkoxy(or aryloxy)carbonyl isothiocyanate

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

Growing community of inventors

Shawnee, KS, United States of America

Shekhar V Kulkarni