摘要:
The preparation of Z-1,2-diarylallyl chlorides of the general formula I ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are hydrogen, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy or a substituted aromatic radical, and n and m are 1, 2 or 3, by dehydrating chlorohydrins of the formula II ##STR2## in which the radicals are as defined above, at up to 50.degree. C. in an inert ether or carboxylic acid ester as solvent and in the presence of a carboxylic anhydride and an organic or inorganic acid, the conversion thereof into azolylmethyloxiranes, and novel intermediates are described.
摘要:
Substituted thiopyridines of the general formula I where n is 1 or 2; R1 is chlorine, C1-C3-fluoroalkyl, nitro or methylsulfonyl; R2 is a C1-C10-alkyl, C2-C10-alkenyl or C2-C10-alkynyl radical, in each case unsubstituted or substituted by halogen, C1-C4-alkoxy, C1-C4-alkoxycarbonyl, di-(C1-C4-alkylamino) carbonyl, cyano or nitro, a C3-C8-cycloalkyl radical, or a C1-C4-alkylenephenyl, phenyl or naphthyl radical which is unsubstituted or substituted in the phenyl moiety by halogen, C1-C3-alkyl, C1-C3-alkoxy, trifluoromethyl, cyano or nitro.
摘要:
Halomethylbenzoyl cyanides I PH--CO--CN (I) where Ph is phenyl which is substituted by chloromethyl or bromomethyl and may cary 1-4 other rradicals, are prepared from halomethylbenzoyl chlorides II PH--CO--Cl (II), by reacting II with a cyanide-donating compound in the presence of a Lewis acid, if required in an inert organic solvent or diluent, and then isolating the product. The halomethylbenzoyl cyanides I are important intermediates for synthesizing crop protection agents.
摘要:
A process for preparing halomethylbenzoyl cyanides IPh-CO-CN I(Ph=phenyl radical substituted by chloromethyl or bromomethyl which, if desired, can additionally carry 1-4 further radicals) by reacting halomethylbenzoyl chlorides IIPh-CO-Cl IIwith an alkali metal cyanide or transition metal cyanide, if appropriate in an organic diluent, and novel halomethylbenzoyl cyanides I' ##STR1## (X=halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, CF.sub.3, C.sub.1 -C.sub.5 -alkyl-(C.sub.1 -C.sub.5 -alkyl)hydroxyimino or C.sub.1 -C.sub.5 -alkyl-(C.sub.2 -C.sub.5 -alkenyl)hydroxyimino; m=0 to 4 and Y=chloromethyl or bromomethyl) are described.The halomethylbenzoyl cyanides I are important intermediates for the synthesis of plant protection agents.
摘要:
Ethereal solutions of arylmethylmagnesium halidesAr--CH.sub.2 --Mg--Hal I(where Ar is unsubstituted or substituted aryl and Hal is Cl or Br) are prepared by the Grignard method from an arylmethyl halide IIAr--CH.sub.2 --Hal IIand magnesium in an ether IIItert-butyl--O--R III(where R is C.sub.1 -C.sub.3 -alkyl) as solvent.
摘要:
A process and intermediates for preparing .alpha.-methoxyiminocarboxylic acid methylamides (I) by Pinner reaction of a cyanoketone (II) with an alcohol and subsequent reaction of the resulting ester (IV) with hydroxylamine to give the oxime (V), methylation of (V) to give the oxime ether (VI) and subsequent reaction of (VI) with methylamine: ##STR1##
摘要翻译:一种通过氰基酮(II)与醇的缩合反应制备α-甲氧基亚氨基羧酸甲基酰胺(I)的方法和中间体,随后将所得酯(IV)与羟胺反应得到肟(V),(V )得到肟醚(Ⅵ),随后的(Ⅵ)与甲胺的反应:X =硝基,三氟甲基,卤素,烷基或烷氧基; n = 0,1,2,3或4; Y = C-有机基团。
摘要:
E-Oxime ethers of phenylglyoxylic esters of the formula I ##STR1## X, Y=halogen, alkyl, alkoxy, CF.sub.3, C(.dbd.NOR)R (R=alkyl or alkenyl) are prepared by reacting oximes of the formula II ##STR2## with a methylating agent in an organic diluent, and E-oximes of phenylglyoxylic esters of the formula II are prepared by isomerizing the E/Z-oximes.
摘要:
1-Bromo-3-chloro-1,2-diaryl-2-propanols of the general formula I ##STR1## where n and m are each 1, 2 or 3, and R.sup.1 and R.sup.2 are each hydrogen, haloalkyl, alkoxy, haloalkoxy, t-butyl or an aromatic radical which may be substituted, are prepared and converted into azolylmethyloxiranes.