Synthesis of ethyl 2-[4-(3-fluoro-2-quinoxalinyloxy)phenoxy]propanoate as herbicide

Add time:09/05/2019    Source:sciencedirect.com

The syntheses of ethyl 2-[4-(3-fluoro-2-quinoxalinyloxy)phenoxy]propanoate (1d), a new fluoro analogue of the herbicide quizalofopethyl, from 2,3-dichloroquinoxaline (3) and of ethyl 2-[4-(6-chloro-3,4-dihydro-3-oxoquinoxalinyl-2-oxy)phenoxy]propanoate (9) from ethyl 2-[4-(3,6-dichloro-2-quinoxalinyloxy)phenoxy]propanoate (2b) via nucleophilic substitution with cesium fluoride coupled with 18-crown-6 are described.

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