摘要:
A process for the manufacture of an ester or the respective free acid of a 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylic acid of formula (I), wherein in such formula (I), Y is H, F or an alkyl group having from 1 to 12 carbon atoms which is optionally substituted by at least one halogen atom, an aralkyl group or an aryl group; R1 is H or an organic residue; R2 is H or an organic residue. Such process comprises submitting a compound of formula (II) to a reduction reaction, wherein in such formula (II), Y is the same as defined for formula (I); X is Cl, Br or I; R1′ is H or an organic residue; and R2′ is H or an organic residue.
摘要:
The invention concerns a process for the manufacture of pyrazole-4-carboxamides, in particular, of 3-difluoromethyl-1-methyl-1 H-pyrazole-4-carboxamides which are useful as pharmaceuticals and agrochemicals. The carboxamides are prepared from the corresponding pyzole-4-carboxylic acid esters and appropriate amine in the presence of a Lewis acid. Alternatively, the reaction is performed in the presence of a Lewis acid and a base.
摘要:
Dyes, method(s) of making them, and their use in photoelectric conversion devices, especially in dye-sensitized solar cells. The dye compounds are phthalocyanine and naphthalocyanine analogues which comprises an element M in a macrocyclic structure having a formula (X).
摘要:
Process for the manufacture of a compound of formula R1OOC-CH(OCH2F)-COOR, (I) or R3HNOC-CH(OCH2F)-CONHR4(II) wherein R1, R2, R3, R4 are equal or different from each other and are independently selected from H; an alkyl group having from 1 to 10 carbon atoms which is optionally substituted by at least one halogen atom; an aralkyl group; or an aryl group, comprising reacting a compound of formula R1OOC-CH(OCH2X)-COOR2 (III) or R3HNOC-CH(OCH2X)-CONHR4(IV) wherein X is a leaving group that can be substituted by nucleophilic substitution, and wherein R1, R2, R3, R4 have the same meaning as above, with at least one source of nucleophilic fluorine.
摘要:
A process for the manufacture of an ester or the respective free acid of a 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylic acid of formula (I), wherein in such formula (I), Y is H, F or an alkyl group having from 1 to 12 carbon atoms which is optionally substituted by at least one halogen atom, an aralkyl group or an aryl group; R1 is H or an organic residue; R2 is H or an organic residue. Such process comprises submitting a compound of formula (II) to a reduction reaction, wherein in such formula (II), Y is the same as defined for formula (I); X is Cl, Br or I; R1′ is H or an organic residue; and R2′ is H or an organic residue.
摘要:
Process for the manufacture of 2-substituted-5-(1-methylthio)alkylpyridines and a process for the manufacture of agriculturally or pharmaceutically active substances comprising the process for the manufacture of 2-substituted-5-(1-methylthio)alkylpyridines.
摘要:
The present invention concerns a process for the obtention of a halogenated carboxylic halide having a reduced content of impurities, a fraction of the halogenated carboxylic halide having a reduced content of impurities, and its use in the manufacture of agriculturally and pharmaceutically active compounds.
摘要:
Process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium using an equipment having at least one surface in contact with the liquid reaction medium, wherein said surface consists of a material selected from glass, polytetrafluoroethylene and nickel based metal alloy.