- Preparation method of pyriproxyfen
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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.
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Paragraph 0027-0030; 0034-0036
(2021/05/01)
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- A 1 - (4-phenoxy-phenyl) - 2-propanol method for the synthesis of (by machine translation)
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The present invention provides a 1 - (4-phenoxy-phenyl) - 2-propanol synthetic method, synthesis route is as follows: This synthetic method is simple and convenient to operate, mild reaction conditions, the reaction selectivity is high, that there is not
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Paragraph 0040; 0045
(2016/10/08)
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- COMPLEX CATALYST, PROCESS FOR PRODUCING THE COMPLEX CATALYST, AND PROCESS FOR PRODUCING ALCOHOL DERIVATIVE WITH THE COMPLEX CATALYST
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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.
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- Design, synthesis, and anti-Trypanosoma cruzi evaluation of a new class of cell-growth inhibitors structurally related to Fenoxycarb
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Several compounds, structurally related to the insect-growth regulator Fenoxycarb (1), were designed and synthesized. These compounds were tested as growth inhibitors of Trypanosoma cruzi cells (epimastigotes). Compounds 6, 16, 18, and 22 were very active against T. cruzi making them promising good candidates either for blood-bank sterilization or Chagas'-disease surveillance, while compounds 11, 12, 13, and 19 showed a moderate degree of activity.
- Schvartzapel,Fichera,Esteva,Rodriguez,Gros
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p. 1207 - 1214
(2007/10/02)
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- Phenoxyphenylalkoxy-, alkenyloxy-, alkinyloxy- and benzyloxy-alkoxy ethers
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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
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