摘要:
A process for preparing o-chloromethylbenzoyl chlorides of the formula I ##STR1## where m is 0 or an integer from 1 to 4 andX is halogen or C-organic radicals,entails reacting a corresponding lactone of the formula II ##STR2## with thionyl chloride in the presence of a catalyst.
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:
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:
The invention relates to a process for preparing polyisobutene having a mean molecular weight Mn of from 400 to 50 000, in particular from 500 to 10 000, by polymerizing isobutene in the presence of a BF3-containing complex catalyst, wherein the polymerization is carried out at least temporarily in the presence of one or more cyclic ethers.
摘要:
A process for reducing the content of oxygen-containing and/or nitrogen-containing compounds in streams having an isobutene content of at least 10% by weight, which comprises passing the stream in the liquid state at a temperature T [in K] and a linear velocity v [in cm/min] over a fixed bed of an acid-free zeolite having a mean pore size of from 0.3 to 1.5 nm, where the fixed bed has a length l [in cm] in the flow direction of the stream and T, v and l obey the relationship 2(T−283 K)/10 K·l/v≦500 min, is described. The process avoids the formation of isobutene oligomers.
摘要:
The present invention relates to polyalkene amine formulations comprising at least one polyalkene amine in a solvent, having improved performance properties, especially improved low temperature properties; a process for preparing such formulations and the use of these formulations in fuel and lubricant compositions, in particular fuels, for improving the intake system-cleaning action of such fuels.
摘要:
Tertiary phosphines (I) are prepared by reducing the corresponding phosphine oxides (IIa) or phosphine dihalides (IIb) using silicon or a silicon alloy as reducing agent.
摘要:
A process for the selective hydrogenation of aromatic groups of organic molecules carrying at least one aromatic group and one epoxy group with hydrogen in the presence of a ruthenium-containing catalyst, in which a homogeneous ruthenium catalyst is used which can be prepared by reducing the ruthenium compound with a metal having a redox potential of from -0.75 to 2.5 V, a boron hydride, an aluminum hydride, an aluminum alkyl compound, a lithium alkyl compound, or a lithium aryl compound in the presence of an ether.
摘要:
A process for the preparation of aromatic aryl chloroformates of the general formula I ##STR1## in which Ar denotes an aryl radical optionally mono- to penta-substituted by C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.3 -C.sub.8 -alkyl-cycloalkyl, C.sub.1 -C.sub.20 -haloalkyl, C.sub.1 -C.sub.20 -alkoxy, C.sub.1 -C.sub.20 -alkylthio, halo, cyano, C.sub.2 -C.sub.20 -alkylcarbonyloxy, C.sub.3 -C.sub.20 -carboalkoxy, formyl, C.sub.2 -C.sub.20 -dialkylamino, aryl, aryloxy, arylthio, aroyl, C.sub.7 -C.sub.20 -aralkyl, C.sub.7 -C.sub.20 -aralkoxy, arylsulfonyl and/or C.sub.7 -C.sub.20 -aralkylthio and/or optionally mono- or di-substituted by chloroformyl and/or nitro, from phosgene and phenols of the general formula IIAr--OH (II),in which Ar has the meanings stated above and optionally carries one or two hydroxy groups, wherein the reaction is carried out at a temperature of from 60.degree. to 180.degree. C. in the presence of an organic phosphorus compound of the general formula III ##STR2## in which at least one of the radicals R.sup.1, R.sup.2, and R.sup.3 stands, irrespective of the others, for --NR.sup.5 R.sup.6 or --O--R.sup.7 andR.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 independently denote C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, halo, aryl, or C.sub.7 -C.sub.20 -aralkyl and R.sup.1 and R.sup.2, R.sup.1 and R.sup.3, R.sup.2 and R.sup.3, and R.sup.5 and R.sup.6 each denote a saturated or unsaturated C.sub.2 -C.sub.5 -alkylene chain,X denotes hydroxy, aryloxy, halo, or an inorganic or organic acid anion,R.sup.4 denotes hydrogen or C.sub.1 -C.sub.20 -alkyl or halo when X stands for halo, aryloxy, or aralkoxy,n is equal to 0 or 1, andR.sup.4 and X can together denote oxygen or sulfur.