Abstract:
The present invention relates to a process for the preparation of 2,4,6-trifluoro-1,3,5-triazine (TFT) from 2,4,6-trichloro-1,3,5-triazine (TCT) or from mixed chlorinated/fluorinated 1,3,5-triazines by fluorination with sodium fluoride in dipolar aprotic solvents.The process is characterized in that TCT or mixed chlorinated/fluorinated 1,3,5-triazines or mixtures thereof are metered into a suspension of sodium fluoride in a dipolar, aprotic solvent, which is warmed to a temperature of between 120.degree. C. and 220.degree. C. and optionally contains a further solvent.
Abstract:
Process for the preparation of triazines containing a mixture of chlorine and fluorine substituents, characterized in that cyanuric chloride is heated with cyanuric fluoride to temperatures from 30.degree.-300.degree. C. in the presence of suitable catalysts.
Abstract:
A process for the preparation of a compound according to claim 1, comprising reacting a compound of the formula ##STR1## in which R.sup.3, R.sup.4 and R.sup.5 each independently is CH.sub.3 or CH.sub.2 Cl, at least one of the radicals R.sup.3, R.sup.4 and R.sup.5 being CH.sub.2 Cl,with a metal fluoride at elevated temperature. The products are new and useful as intermediates for making other compounds, especially carbamate insecticide synergists.
Abstract:
In the preparation of 3-bromo-4-fluorotoluene by reacting 4-fluorotoluene with bromine, the improvement which comprises effecting the bromination in glacial acetic acid in the presence of iodine and iron or an iron salt. As a result the proportion of 3-bromo-4-fluorotoluene relative to its 2-bromo-4-fluorotoluene isomer is markedly increased.
Abstract:
Symmetric benzophenones substituted by groups containing fluorine are prepared by reacting aromatic compounds substituted by groups containing fluorine with formaldehyde and/or a formaldehyde derivative, with the addition of hydrogen fluoride, fluorosulphonic acid and/or sulphuric acid, to give the corresponding diphenylmethanes and oxidizing these. The symmetric benzophenones substituted by groups containing fluorine are used for the preparation of polyether ketones by reacting them with diols. New symmetric benzophenones substituted by groups containing fluorine are also disclosed.
Abstract:
Aromatic aldehydes are prepared by formylating the corresponding aromatic compounds with urotropine in the presence of hydrogen fluoride. By the described process certain new aromatic aldehydes can be prepared.
Abstract:
The invention relates to substituted cinnamic acids and cinnamic acid esters of formula (I), wherein X represents F, Cl or J and R1 and R2 are the same or different and represent hydrogen, an optionally substituted C1-C10-alkyl radical or an optionally substituted benzyl radical. Substituted indanone carboxylic acid esters are produced using said substituted cinnamic acid and cinnamic acid ester in a technically simple and non-dangerous manner as far as safety is concerned.
Abstract:
The invention relates to new fluoromethylated polycyanobenzenes of the formula ##STR1## in which X represents hydrogen, fluorine or chlorine,m is 1 or 2 andn is (6-m),to a process for their preparation and to the salt-like alkali metal cyanide adducts of the fluoromethylated polycyanobenzenes formed as intermediates in this preparation process and to the use of the fluoromethylated polycyanobenzenes for the detection of anions.
Abstract:
Novel hydroxyalkinyl-azolyl derivatives of the formula ##STR1## in which Ar represents optionally substituted aryl,R represents alkyl, optionally substituted aryl or optionally substituted aralkyl,X.sup.1 represents halogen,X.sup.2 represents hydrogen or halogen,X.sup.3 represents hydrogen or halogen,X.sup.4 represents hydrogen or halogen andn represents 0 or 1,and acid addition salts and metal salt complexes thereof, are outstandingly effective as fungicides.
Abstract translation:式(I)的新型羟基烯基 - 唑基衍生物,其中Ar表示任选取代的芳基,R表示烷基,任选取代的芳基或任选取代的芳烷基,X 1表示卤素,X 2表示氢或卤素,X 3表示氢或卤素, X 4表示氢或卤素,n表示0或1,并且其酸加成盐和金属盐络合物作为杀真菌剂显着有效。