Abstract:
The present invention relates to a process for preparing substituted isatoic acid anhydride compounds of the formula (I) in which R1 is Cl, Br, I, or CN; and R2 is CH3, Cl, Br; using anthranilic acid derivative compounds of formula (III) and/or carbamate compounds of formula (II) wherein R1 and R2 are as defined above; RAr is CH3, Cl, NO2 and n is 0, 1, 2, 3, 4 or 5; The present invention relates also to the compounds of formula (II) and to processes comprising further preceding and/or subsequent reaction steps, leading to anthranilamide pesticides or to precursors for them.
Abstract:
The present invention relates to a process for manufacturing 4-propargylated amino-benzoxazinones of formula (I), comprising the following steps: step a) preparing propargyl chloride by reacting propargyl alcohol with thionyl chloride optionally in the presence of a catalyst; and step b) reacting the propargyl chloride prepared in step (a) with a NH-benzoxazinone of formula (II); wherein the variables are defined according to the description.
Abstract:
The present invention relates to a process for preparing bromotrichloromethane comprising a) providing bromine in chloroform; and b) radiation of the resulting solution with light in the range of 350 to 550 nm, wherein said solution of bromine in chloroform is not radiated with radiation of a wavelength below 350 nm.
Abstract:
The present invention relates to a process for preparing optically active compounds of formula X and intermediates thereof, wherein the variables of compound of formula X are as defined in the claims and the description.
Abstract:
The present invention relates to a process for preparing optically active compounds of formula X and intermediates thereof, wherein the variables of compound of formula X are as defined in the claims or the description.
Abstract:
The present invention relates to a process for the purification of pyrazolpyridazines of formula I wherein the variables are as defined in the specification, by adding HCl to a solution of the pyrazolpyridazine in an inert solvent under non-aqueous conditions, effecting crystallization of the HCl-salt, isolating the resulting precipitate.
Abstract:
The present invention relates to a catalytic process for preparing pyrazoles comprising the step of cyclizing hydrazone substituted α,β-unsaturated carbonyl compounds by reacting them with hydrogen in a reaction mixture comprising as components (a) a hydrogenation catalyst, (b) an acid selected from Brønsted acids, ammonium salts of Brønsted acids, and Lewis acids, (c) a protic solvent, and optionally (d) an aprotic solvent.
Abstract:
Provided herein is a process for preparing a pyridazine amine compound of formula V, and a process for preparing dichloropyridazine amine compounds of formula IVa, IVb, and mixtures thereof. Further, provided herein are novel dichloropyridazine amine compounds of formula IVa, IVb, and mixtures thereof, wherein the amino group is an ethylamino group.