57650-78-9Relevant articles and documents
Preparation method of pyriproxyfen
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Paragraph 0027-0030; 0034-0036, (2021/05/01)
The invention relates to a preparation method of pyriproxyfen, which comprises the following steps: condensing 4-phenoxyphenol and propylene carbonate under the action of a catalytic amount of alkali to obtain 1-(4-phenoxyphenyl)-2-propanol PPP; and continuously condensing the obtained PPP with 2-chloropyridine to obtain pyriproxyfen. The method avoids the generation of the byproduct is-PPP in the original process, improves the product quality and yield, reduces the production cost, is simple and practical, and has a good industrial prospect.
COMPLEX CATALYST, PROCESS FOR PRODUCING THE COMPLEX CATALYST, AND PROCESS FOR PRODUCING ALCOHOL DERIVATIVE WITH THE COMPLEX CATALYST
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, (2008/06/13)
There are provided (asymmetric) complex catalysts comprising metal complexes and Lewis acids as components, the metal complex being of formula (1): wherein R1, R2, R3, R4, R5, R6, R7 and R8 are the same or different and are independently hydrogen, halogen, alkyl or the like; one of R9 and R10 is hydrogen and the other is alkyl of 1 to 4 carbon atoms or the like; Q is a single bond or alkylene of 1 to 4 carbon atoms; M is a metal ion; and A is a balancing counter ion or ligand; processes for the production of these complex catalysts; processes for the production of (optically active) alcohol derivatives, characterized in that cyclic ether compounds are reacted with phenol derivatives in the presence of these complex catalysts; and further processes for producing (optically active) nitrogen-containing heterocyclic compounds by reacting these alcohol derivatives with halogenated nitrogen-containing heterocyclic compounds in the presence of a base.
Phenoxyphenylalkoxy-, alkenyloxy-, alkinyloxy- and benzyloxy-alkoxy ethers
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, (2008/06/13)
New phenoxy-phenyl ethers, their manufacture and use for the control of insects and representatives of the order acarina are disclosed. The compounds correspond to the formula EQU1 wherein W represents --O--, --S--, R1 represents C1