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Molecules 2005, 10(9), 1119-1125; doi:10.3390/10091119
Article

A Facile Synthesis of Novel Herbicidal 1-Phenyl-piperazine-2,6-diones

1, 2, 3, 2, 1 and 1,*
1 State Key Laboratory of Elemento-Organic Chemistry, Nankai University, China 2 Agrochemicals Division, Shenyang Research Institute of Chemical Industry, China 3 Applied Chemistry Department, Chaoyang University of Technology, Taiwan, China
* Author to whom correspondence should be addressed.
Received: 23 April 2005 / Accepted: 30 September 2005 / Published: 30 September 2005
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Abstract

Novel 1-phenyl-piperazine-2,6-diones were prepared by a new facile synthetic routeusing methyl N-substituted iminomonoacetate as starting material. The structures of thesecompounds were established by 1H-NMR, 13C-NMR and GC/MS. 2-(4-Chloro-5-cyclo-pentyl-oxy-2-fluorophenyl)-tetrahydro-2H-pyrido-[1,2-a]-pyrazine-1,3-(4H,6H)-dione displayed thegreatest herbicidal activity.
Keywords: 1-Phenyl-piperazine-2; 6-dione; 2-phenyl-tetrahydro-2H-pyrido-[1; 2-a]-pyrazine- 1; 3-(4H; 6H)-dione; 2-phenyl-tetrahydropyrrolo[1; 2-a]pyrazine-1; 3(2H; 4H)- dione; herbicide; synthesis. 1-Phenyl-piperazine-2; 6-dione; 2-phenyl-tetrahydro-2H-pyrido-[1; 2-a]-pyrazine- 1; 3-(4H; 6H)-dione; 2-phenyl-tetrahydropyrrolo[1; 2-a]pyrazine-1; 3(2H; 4H)- dione; herbicide; synthesis.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Li, B.; Xiang, D.; Hsu, C.; Liu, Z.; Wu, C.; Yang, H. A Facile Synthesis of Novel Herbicidal 1-Phenyl-piperazine-2,6-diones. Molecules 2005, 10, 1119-1125.

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