Processes for the preparation of azoxystrobin using dabco as a catalyst and novel intermediates used in the processes
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Abstract
The present invention relates, inter alia, to a process for preparing a compound of formula (I): which comprises either (a) reacting a compound of formula (II): with 2-cyanophenyl, or a salt thereof, in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane, or (b) reacting a compound of the formula (III): with a compound of the formula (IV): in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane; where W is the methyl (E)-2-(3-methoxy)acrylate group C(CO2CH3)═CHOCH3 or the methyl 2-(3,3-dimethoxy)propanoate group C(CO2CH3)CH(OCH3)2, or a mixture of the two groups. In addition, the present invention relates to a novel precursors of the compound of formula (I) and methods for making them.
13 Citations
12 Claims
- 1. A process for preparing a compound of formula (I):
Specification
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- Resources
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Current AssigneeSyngenta Limited (China National Chemical Corporation)
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Original AssigneeSyngenta Limited (China National Chemical Corporation)
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InventorsWhitton, Alan John, Boyd, Ewan Campbell, Vass, Jack
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Primary Examiner(s)RAO, DEEPAK R
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Application NumberUS11/912,675Publication NumberTime in Patent Office2,147 DaysField of Search544/319US Class Current544/319CPC Class CodesC07C 67/31 by introduction of function...C07C 67/327 by elimination of functiona...C07C 69/734 EthersY02P 20/55 Design of synthesis routes,...
