摘要:
The invention relates to novel N-aryl-substituted nitrogen-containing heterocycles, several processes and novel intermediates for their preparation, and their use as herbicides and plant growth regulators.
摘要:
Herbicidal N-aryl-substituted nitrogen-containing heterocycles of the formula ##STR1## in which Het represents a heterocycle of the formula ##STR2## R.sup.1 represents hydrogen or halogen and R.sup.2 represents halogen, hydroxyl or represents a radical --Z.sup.2 --R.sup.8, whereX.sup.1 represents oxygen, represents a --CH.sub.2 -- group, represents a ##STR3## group or represents a ##STR4## group, X.sup.2 represents nitrogen or a CH group,Z.sup.1 represents oxygen or sulphur,Z.sup.2 represents oxygen or sulphur,R.sup.3 and R.sup.4 independently of one another in each case represent hydrogen or alkyl,R.sup.5 and R.sup.6 either independently of one another in each case represent hydrogen or alkyl or together represent a double-linked alkanediyl radicalR.sup.7 represents hydrogen, alkyl or represents optionally substituted aryl andR.sup.8 represents in each case optionally substituted alkyl, alkenyl, alkinyl or cycloalkyl.
摘要:
Herbicidal N-aryl-substituted nitrogen-containing heterocycles of the formula ##STR1## in which Het represents a heterocycle of the formula ##STR2## R.sup.1 represents hydrogen or halogen and R.sup.2 represents halogen, hydroxyl or represents a radical --Z.sup.2 --R.sup.8,whereX.sup.1 represents oxygen, represents a --CH.sub.2 -- group, represents a ##STR3## or represents a ##STR4## represents nitrogen or a CH group, Z.sup.1 represents oxygen or sulphur,Z.sup.2 represents oxygen or sulphur,R.sup.3 and R.sup.4 independently of one another in each case represent hydrogen or alkyl,R.sup.3 and R.sup.6 either independently of one another in each case represent hydrogen or alkyl or together represent a double-linked alkanediyl radical,R.sup.7 represents hydrogen, alkyl or represents optionally substituted aryl andR.sup.8 represents in each case optionally substituted alkyl, alkenyl alkinyl or cycloalkyl.
摘要翻译:其中Het表示下式的杂环的式(I)的除草的N-芳基取代的含氮杂环:R1表示氢或卤素,R2表示氢或卤素,R2表示 表示卤素,羟基或代表基团-Z2-R8,其中X1表示氧,表示-CH2-基,表示“IMAGE”,或表示“IMAGE”表示氮或CH基,Z1表示氧或硫,Z2 R 3和R 4彼此独立地表示氢或烷基,R 3和R 6彼此独立地表示氢或烷基或一起代表双链烷二基,R 7表示氢,烷基 或表示任选取代的芳基,并且R 8表示在各种情况下为任选取代的烷基,烯基炔基或环烷基。
摘要:
Combating unwanted vegetation with N-phenyl-substituted oxazinediones of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 can each be hydrogen or an organic radical or R.sup.2 and R.sup.3 and/or R.sup.6 and R.sup.7 can form a ring, andQ is oxygen or sulphur.Those compounds are new wherein at least three of the radicals R.sup.1 to R.sup.5 are other than hydrogen or the two radicals R.sup.2 and R.sup.3 together represent --O--CH.sub.2 --O--CH.sub.2 -- or the group --X--(CO).sub.n --A--Y--.
摘要:
The present invention relates to a process for the continuous preparation of diaryl carbonates from phosgene and at least one monohydroxy compound (monophenol) in the presence of catalysts, and also the use thereof for preparing polycarbonates. The hydrogen chloride formed in the reaction is converted by electrochemical oxidation into chlorine, with the chlorine being recirculated to the preparation of phosgene. In particular, the process comprises utilization of the hydrogen chloride formed for the process for preparing diphenyl carbonate (DPC process).
摘要:
The invention provides a process for preparing diaryl carbonates from dialkyl carbonates and aromatic hydroxyl compounds using at least two reaction columns, a process section for recovering the dialkyl carbonate used in the reaction and for removing the alcohol of reaction, one or more process steps for removing the by-products obtained in the process which have a boiling point between that of the dialkyl carbonate and that of the alkyl aryl carbonate formed during the preparation of the diaryl carbonate, and a process step for further purification of the diaryl carbonate obtained from the reaction columns.
摘要:
The invention relates to bimetallic complexes in which the ligand contains a salophen unit which complexes copper, manganese or cobalt and a phenanthroline unit which complexes palladium and the two systems are linked by a continuous conjugated system. The invention further relates to the use of these bimetallic complexes as catalysts for the oxidative carbonylation of aromatic hydroxy compounds to form diaryl carbonates, a process for preparing diaryl carbonates using the bimetallic complex as catalyst and also diaryl carbonates prepared by oxidative carbonylation of aromatic hydroxy compounds using the bimetallic complexes of the invention as catalysts.
摘要:
The present invention relates to a continuous process for preparing lower dialkyl carbonates as main product and alkylene glycol as by-product by catalyzed transesterification of a cyclic alkylene carbonate (e.g. ethylene carbonate or propylene carbonate) with lower alcohols, where the reaction of the alkylene carbonate is carried out with an alcohol containing dialkyl carbonate in countercurrent, characterized in that introduction of a stream containing at least 99.5% by weight of alcohol takes place below the point of introduction for the alcohol containing dialkyl carbonate in a particular spacing ratio between the abovementioned points of introduction.
摘要:
The present invention relates to a process comprising purifying dialkyl carbonates of the formula (II) in one or more columns in the presence of an alkylene oxide of the formula (V) and of an alkyl alcohol of the formula (IV) wherein R1 and R2 represent, independently of one another, linear or branched, substituted or unsubstituted C1-C6-alkyl, R3 and R4 represent, independently of one another, hydrogen, substituted or unsubstituted C1-C4-alkyl, substituted or unsubstituted C2-C4-alkenyl or substituted or unsubstituted C6-C12-aryl, and R5 represents a straight-chain or branched C1-C4-alkyl; and wherein the mean residence time of the dialkyl carbonate in the column(s) is from 0.3 h to 3 h.
摘要:
The present invention relates to a process for continuously preparing diaryl carbonates from dialkyl carbonates and at least one monohydroxyl compound in the presence of catalysts, and to the use thereof for preparation of polycarbonates. The alkylene glycol obtained in the preparation of the dialkyl carbonate used is recycled by oxidative carbonylation with carbon monoxide in the presence of a catalyst to give the cyclic alkylene carbonate which is in turn converted to the dialkyl carbonate. More particularly, the process utilizes the alkylene glycol obtained for the diphenyl carbonate preparation process (DPC process).