摘要:
Verfahren zur Herstellung von 3-(2-Aryl- vinyl)-2,2-dimethyl-cyclopropan -1-carbonsäureestern der Formel in welcher Ar für einen carbocyclischen oder heterocyclischen aromatischen Rest, R für Alkyl sowie für einen bei Pyrethroiden üblichen Rest und R 1 für Wasserstoff oder Halogen stehen, durch Umset zung entsprechender 1-Aryl-4-methylpenta-1, 3-diene (11) mit entsprechenden Diazoessigsäureestern, neue Ausgangsverbindungen II selbst und mehrere verschiedene Verfahren zur Herstellung derselben, beispielsweise durch Umsetzung eines β-Aryl-acroleins der Formel worin Ar und R 1 obige Bedeutung haben mit Triphenylisopropylphosphoran oder mit Isopropylmagesiumchlorid sowie ein Verfahren zur Herstellung der Verbindung VII in der R 1 für Halogen steht durch Umsetzung eines Arylmethylketons mit Dimethylformamid und Phosphoroxyhalogenid. Die Verbindungen der Formel I können als Zwischenprodukte zur Herstellung von Insektiziden verwendet werden.
摘要:
A method for producing cumene of the present invention is a method for producing cumene by subjecting cumyl alcohol to (a) hydrocracking reaction, or (b) dehydration and subsequent hydrogenation reaction, to obtain cumene, the method comprising the following steps of: (A): feeding a liquid containing cumene to a reactor loaded with a catalyst, (B): feeding hydrogen and a liquid containing cumyl alcohol to the reactor after the step (A).
摘要:
The present invention relates to compositions comprising alkene benzenes or alkene benzene sulfonates or alkylbenzenes or alkylbenzene sulfonates; methods for making alkene benzenes or alkene benzene sulfonates or alkylbenzenes or alkylbenzene sulfonates; where the benzene ring is optionally substituted with one or more groups designated R*, where R* is defined herein. More particularly, the present invention relates to compositions comprising 2-phenyl linear alkene benzenes or 2-phenyl linear alkene benzene sulfonates or 2-phenyl linear alkylbenzenes or 2-phenyl linear alkylbenzene sulfonates; methods for making 2-phenyl alkene benzenes or 2-phenyl alkene benzene sulfonates or 2-phenyl alkylbenzenes or 2-phenyl alkylbenzene sulfonates; where the benzene ring is optionally substituted with one or more groups designated R*, where R* is defined herein.
摘要:
Provided is class of compounds of formula (I) wherein X, R1, R2 and R3 have the same meaning as given in the specification capable of releasing fragrant compounds in a controlled manner into the surroundings.
摘要:
Systems and methods for the production of phenol and acetone from cumene oxidation products. One method includes reacting cumene and an oxidizing agent to produce a cumene oxidation product including cumene hydroperoxide and dimethyl benzyl alcohol, converting at least a portion of the dimethyl benzyl alcohol to cumene hydroperoxide by reacting the at least a portion of the dimethyl benzyl alcohol with hydrogen peroxide in both an organic phase and an aqueous to produce a converted cumene oxidation product, and cleaving the converted cumene oxidation product to produce an output product including one or more of phenol, acetone, and alpha-methylstyrene.