摘要:
A process for the preparation of 2,4,6-trimethylbenzoic acid of the formula I ##STR1## in which .alpha.-chloro-2,4,6-trimethylacetophenone is reacted with an alkali hydroxide solution and chlorine in the presence of a phase-transfer catalyst at a temperature ranging from 0.degree. to 150.degree. C. and a pressure ranging from 0.01 to 50 bar, and a process for the preparation of 2,4,6-trimethylbenzoic acid I, in which .alpha.-chloro-2.4.6-trimethylacetophenone of the formula II ##STR2## is reacted with 1,3,5-trimethylbenzene and chloroacetyl chloride in the presence of a catalyst at a temperature ranging from 0.degree. to 150.degree. C. and a pressure ranging from 0.01 to 50 bar, the catalyst used being an iron oxide.
摘要:
The preparation of .alpha.-carbonylphosphine oxides by oxidizing an .alpha.-hydroxyalkyl phosphine oxide with an organic hydroperoxide or of an organic peroxy acid in the presence of a compound of a Group IV to Group VIII metal in the periodic table, and novel .alpha.-hydroxybenzyl phosphine oxides..alpha.-Carbonylphosphine oxides are used as photoinitiators for polymerizable compositions.
摘要:
The preparation of .alpha.-carbonylphosphine oxides by oxidizing an .alpha.-hydroxyalkyl phosphine oxide with an organic hydroperoxide or of an organic peroxy acid in the presence of a compound of a Group IV to Group VIII metal in the periodic table, and novel .alpha.-hydroxybenzyl phosphine oxides. .alpha.-Carbonylphosphine oxides are used as photoinitiators for polymerizable compositions.
摘要:
Arenebisphosphine oxides of the general formula ##STR1## where R.sup.1 to R.sup.4 independently of one another are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.5 -C.sub.10 -aryl, C.sub.5 -C.sub.12 -aryloxy or C.sub.7-C.sub.14 -arylalkoxy, R.sup.5 and R.sup.6 independently of one another may each be C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.10 -cycloalkyl or C.sub.5 -C.sub.12 -aryl, each of which may furthermore contain one or two nitrogen or sulfur atoms in the ring system or carry one or two halogen atoms or C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy groups as substituent on the ring system, or C.sub.1 -C.sub.6 -alkoxy, C.sub.3 -C.sub.8 -alkoxyalkoxy, C.sub.5 -C.sub.12 -aryloxy or C.sub.7 -C.sub.14 -arylalkoxy, or R.sup.5 and R.sup.6 together form a bridge of 2 to 10 carbon atoms, in which some of the carbon atoms may furthermore be part of an aromatic ring.
摘要:
Polyacylated aromatic compounds of formula I ##STR1## where R.sup.1 is phenyl which is unsubstituted or has inert substituents or is .alpha.-halo-C.sub.1 -C.sub.6 -alkyl, it being possible for these radicals to be identical or different;R.sup.2 is C.sub.1 -C.sub.4 -alkyl;m is 2 or 3;n is 0 to 4, it being possible for the R.sup.2 substituents to be different when n>1,with the proviso that m+n.ltoreq.6, are prepared by reacting an acylaromatic compound of the formula II ##STR2## where p is 1 or 2, with a carbonyl halide of the formula III ##STR3## where X is halogen, in an amount appropriate for the desired degree of acylation, in the presence of Fe(II), Fe(III), Zn(II), Mo(VI), W(VI) or Sn(IV) compounds.
摘要:
A process for manufacturing 5-chloromethyl-2,3-pyridine dicarboxylic acid anhydrides (I) wherein Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; comprising the steps of (i) reacting a compound of formula (II), wherein the symbols have the meaning given in formula (I), with a chlorinating agent, optionally in the presence of a radical initiator in a solvent selected from halogenated hydrocarbons, and (ii) crystallizing the compound (I) formed in step (i) from a solvent selected from chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, dichloroethane, trichloromethane, dichloromethane, toluene, xylenes, ethyl acetate, methyl tert.-butyl ether, and mixtures thereof. Compounds (I) are useful intermediates in the synthesis of herbicidal imidazolinones.
摘要:
A process for manufacturing 5,6-disubstituted-3-pyridylmethyl ammonium bromides (I), wherein Q is a tertiary aliphatic or cyclic, saturated, partially unsaturated or aromatic amine; Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; Y and Y1 are each independently OR1, NR1R2, or when taken together YY1 is —O—, —S— or NR3—; R1 and R2 are each independently hydrogen, C1-C4 alkyl optionally substituted with C1-C4 alkoxy or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms, or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms; R3 is hydrogen or C1-C4 alkyl; comprises the steps of (i) reacting a compound of formula (II), wherein the symbols have the meaning given in formula (I), with bromine in the presence of a radical initiator in a solvent mixture comprising an aqueous phase and an organic phase, where the organic phase comprises a solvent selected from 1,2-dichloroethane, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene and tetrachloromethane, and where the pH-value of the aqueous phase is from 3 to
摘要:
A process for manufacturing 5,6-disubstituted-3-pyridylmethyl ammonium bromides (I), wherein Q is a tertiary aliphatic or cyclic, saturated, partially unsaturated or aromatic amine; Z is hydrogen or halogen; Z1 is hydrogen, halogen, cyano or nitro; Y and Y1 are each independently OR1, NR1R2, or when taken together YY1 is —O—, —S— or NR3—; R1 and R2 are each independently hydrogen, C1-C4 alkyl optionally substituted with C1-C4 alkoxy or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms, or phenyl optionally substituted with one to three C1-C4 alkyl groups, C1-C4 alkoxy groups or halogen atoms; R3 is hydrogen or C1-C4 alkyl; comprises the steps of (i) reacting a compound of formula (II), wherein the symbols have the meaning given in formula (I), with bromine in the presence of a radical initiator in a solvent mixture comprising an aqueous phase and an organic phase, where the organic phase comprises a solvent selected from 1,2-dichloroethane, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene and tetrachloromethane, and where the pH-value of the aqueous phase is from 3 to
摘要:
A circuit arrangement for motor vehicles for characterizing one of several variants of an electrically controllable subassembly is provided. A subassembly is connectable to a coding plug. The coding plug has at least one electric terminal which is directly or indirectly connectable to a measurement input of an analyzer unit. The coding plug has fixed electric wiring by means of which a defined electric state may be generated at the measurement input in the analyzer unit. The electric state is detected in the analyzer unit and compared with stored data, by means of which a defined electric state that can be differentiated from all other states is assigned to each possible variant of the subassembly.
摘要:
A circuit arrangement for motor vehicles for characterizing one of several variants of an electrically controllable subassembly is provided. A subassembly is connectable to a coding plug. The coding plug has at least one electric terminal which is directly or indirectly connectable to a measurement input of an analyzer unit. The coding plug has fixed electric wiring by means of which a defined electric state may be generated at the measurement input in the analyzer unit. The electric state is detected in the analyzer unit and compared with stored data, by means of which a defined electric state that can be differentiated from all other states is assigned to each possible variant of the subassembly.