Abstract:
Compounds of the formula I ##STR1## in which A is C.sub.2-12 -alkenyl, C.sub.4-8 -cycloalkenyl or a grouping--C(R).dbd.C(R')--Y and Y, R, R', R.sub.1, R.sub.2, R.sub.3 and R.sub.3 ' are as defined in patent claim 1, can be prepared in high yields in a simple and economical manner by reacting corresponding bromobenzenes or iodobenzenes with a compound HA in the presence of an alkali metal salt or alkaline earth metal salt of an aliphatic monocarboxylic acid having 1-12 C atoms or benzoic acid, of a cyclic or N,N-disubstituted amide as the solvent, particularly N,N-dimethylformamide, and of a palladium compound which can, if desired, contain arsenic or phosphorus, as the catalyst.
Abstract translation:其中A是C2-12链烯基,C4-8-环烯基或分组-C(R)= C(R')-Y和Y,R,R'的式I的化合物(I) R 1,R 2,R 3和R 3'如专利权利要求1中所定义,可以通过在碱金属盐或碱土金属存在下使相应的溴苯或碘苯与化合物HA反应,以高产率简单经济地制备 具有1-12个碳原子的脂族一元羧酸或苯甲酸的盐,作为溶剂的环状或N,N-二取代的酰胺的盐,特别是N,N-二甲基甲酰胺,以及如果需要,含有砷的钯化合物 或磷,作为催化剂。
Abstract:
Macrocyclic ring opening reaction. The 2-nitro cycloalkan-1-ones and similar 2-nitro heterocyclic compounds are ring opened by reduction of the carbonyl oxygen with an anionic species such as NaBH.sub.4. An .alpha.,.omega.-nitro alcohol is recovered.
Abstract:
A process for the preparation of 6-chloro-2,4-dinitrophenol in a high yield and in a high degree of purity by saponifying 2,4-dinitrochlorobenzene and/or 2,4-dinitrophenyl alkyl ethers of the formula ##STR1## in which m denotes the number 2, 3 or 4 and n denotes the number 1 or 2, by means of aqueous sodium hydroxide or potassium hydroxide solution and chlorinating the resulting 2,4-dinitrophenol with sodium hypochlorite, which comprises chlorinating the 2,4-dinitrophenol, without prior isolation as an intermediate, in aqueous suspension at a pH value of 3.5-7 by means of chlorine bleach liquor at temperatures of 5.degree. to 20.degree. C.
Abstract:
Process for fluorinating an organic carbanion, which process comprises contacting and reacting, in a dry inert atmosphere, the compound of the formula selected from ##STR1## wherein ##STR2## is the carbanion, M is a counter ion, and X is a halide and a selected N-flouro-N-alkylsulfonamide.
Abstract:
A process for the preparation of nitro-olefins comprising reacting a compound of the formula ##STR1## where R and R.sup.1 can be hydrogen, alkyl of 1-20 carbon atoms or phenyl, with an aldehyde acceptor selected from the group consisting of alkylene polyols or aromatic polyols, in the presence of an alkaline catalyst or a Lewis acid catalyst.
Abstract:
A method for the preparation of certain difluoromethoxyaromatic compounds which are useful intermediates for the preparation of pyrethroid pesticides. The method comprises alkylating a p-substituted phenol with excess chlorodifluoromethane at atmospheric and superatomspheric pressures in the presence of a base, acetone, benzyltriethylammonium chloride, and water.
Abstract:
A process for preparing a substantially pure, isomer free 5-(2-halo-4-trifluoromethylphenoxy)-2-nitrobenzoic acid or its esters, salts and amides by the basic condensation of a 4-trifluoromethylphenol and a 1-chloro-3-substituted-4-nitrobenzene followed by halogenation. All known previous routes afforded, in addition to the desired product, a number of inactive isomers.
Abstract:
A process for the preparation of Benzaldehydes substituted in the nucleus is disclosed by oxidation of the corresponding benzyl halides. The process is performed in the presence of water using aminoxides of tertiary amines.
Abstract:
Fluorobenzenes are manufactured by reacting substituted chlorobenzenes with potassium fluoride in the presence of catalytic amounts of cesium fluoride and in the presence of certain solvents; m-nitrofluorobenzenes and m-cyanofluorobenzenes can also be manufactured in the absence of cesium fluoride. The products are starting materials for the manufacture of dyes, pharmaceuticals and pesticides.
Abstract:
There is disclosed a process for converting 2,2', 4,4', 6,6'-hexanitrobibyl (HNBB) to 2,2', 4,4', 6,6'-hexanitrostilbene (HNS) by reacting HNBB with a copper ammino compound in a solvent. The HNS product can be produced in yields of greater than 65%.