Abstract:
A method useful for the synthesis of a meta-substituted nitrogen derivative, comprising the step of deaminating an ortho- and/or para-substituted nitroaniline of the aniline function. The method is useful for organic synthesis.
Abstract:
The invention concerns a method for using a carbamoyl fluoride as fluorinating agent. Said method consists in treating a derivative bearing a halogen-containing carbon, with a carbamoyl fluoride at a temperature not less than 70 DEG C and in maintaining the ratio between the sum of hydrofluoric acid (HF) and carbamoyl fluoride as well as between the sum of exchangeable halogen atoms, isocyanate functions and carbamoyl fluoride [(HF + carbamoyl fluoride)/(exchangeable halogen + isocyanate + carbamoyl fluoride)] at a value not more than 1.2; then in carrying out a catalysis process with tin, antimony and/or titanium salt. The invention is applicable to synthesis of fluorinated derivatives.
Abstract:
A compound of formula (II), wherein n is 1-5, Z is a radical that is stable under catalytic hydrogenation conditions, p is less than 5-n, X is a radical capable of undergoing hydrogenolysis, and q is from 0 to 5-(n + p), is subjected to catalytic hydrogenation in a catalyst-containing liquid medium under hydrogen pressure. The compound of formula (II) is fed into the medium gradually so that the content of the compound of formula (II) in the liquid does not exceed 1000 ppm by weight. A compound of formula (I) is selectively formed.