Basf Aktiengesellschaft

Bjoern Girgensohn

Michael Keil

Friedrich Linhart

Hans Ziegler

August Wigger

Walter Gueckel

Gotthard Synnatschke

Norbert Goetz

Hardo Siegel

Bernd Zeeh

Eckhard Hickmann

Hans Rupert Merkle

Gernot Reissenweber

Dietrich Mangold

Winfried Richarz

Fritz Zanker

Hans-Richard Mueller

Monoclinic 2-chloro-(2',6'-dimethyl-N-pyrazol-1-ylmethyl)-acetanilide of the formula ##STR1## which melts at 76.degree. C. Processes for its preparation and herbicides.

Preparation of monoclinic metazachlor

Monoclinic 2-chloro-(2',6'-dimethyl-N-pyrazol-1-ylmethyl)-acetanilide of the formula I ##STR1## which melts at 76.degree. C.

Monoclinic 2-chloro-(2',6'-dimethyl-N-pyrazol-1-ylmethyl)-actanilide of the formula ##STR1## which melts at 76.degree. C. Processes for its preparation and herbicides.

Monoclinic metazachlor and composition

2,6-Dimethylmorpholine containing a high proportion of the cis compound is prepared by cyclization of diisopropanolamine (1,1'-iminobispropan-2-ol) in the presence of sulfuric acid, with simultaneous addition of the components and full utilization of the heat of reaction.

Preparation of cis-2,6-dimethylmorpholine

Aromatic azomethines are prepared by reacting anilines with formaldehyde and then removing the greater part of the water by distillation, low-boiling alcohols, in certain amounts, being present during the distillation and, if desired, during the reaction or during a part thereof. The aromatic azomethines obtainable by the novel process are valuable starting materials for the preparation of herbicides, especially pre-emergence herbicides and post-emergence herbicides, fungicides, insecticides, bacteriostatic agents, fungistatic agents and vulcanization accelerators.

Preparation of aromatic azomethines

O,N-Disubstituted hydroxylamines are prepared by reacting O-substituted ketoximes with hydrogen in the presence of a platinum catalyst at from 35 to 50 bar, in a medium containing a mineral acid. The O,N-disubstituted hydroxylamines I obtained by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.

Preparation of O,N-disubstituted hydroxylamines

N-Cyclohexyl-N-methoxyacetoacetamide, its preparation and its use as an intermediate for the preparation of O-methyl-N-cyclohexyl-2,5-dimethylfuran-3-hydroxamic acid.

N-Cyclohexyl-N-methoxyacetoacetamide

A process for the preparation of a 2,5-dimethylfuran-3-carboxylic acid ester from an .alpha.-acyloxypropionaldehyde and an acetoacetic acid ester in the presence of anhydrous iron-III chloride.

Growing community of inventors

Mannheim, Germany

Bjoern Girgensohn