Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Prel...Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Preliminary biological tests showed that complexes 1（CuL2Cl2（R=CH3）） and 5（ZnL2Cl2（R=n-C3H7）） exhibited a certain weeding activity against wheat and barnyard grass.展开更多
A new high activated organic weedicide quinclorac (3,7-dicholoro-8-quinoxylic acid) was presented, and the optimal synthesis condition of the key step-Skraup cyclization was developed. A new synthesis process by using...A new high activated organic weedicide quinclorac (3,7-dicholoro-8-quinoxylic acid) was presented, and the optimal synthesis condition of the key step-Skraup cyclization was developed. A new synthesis process by using the catalyst of KI was set up,and the yield increased to 95 5%. The relationship between structure and activity of quinclorac and its derivatives was studied to find more active and more mild weedicide, 12 derivatives of this acid were synthesized, and the biological activities of all these compounds were detected, the QSAR equation of this series of compounds was established by Hansch method, which shows that the biological activity is linearly correlated with parameters L, M R, B 1, B 2 and B 4, and -CH 2-CH=CH 2 substituted quinclorac ester was more active and more mild weedicide analysised from QSAR equation.展开更多
文摘Four pyrimidine derivatives and six corresponding complexes with Cu（Ⅱ） and Zn（Ⅱ） were synthesized and characterized by elemental analysis, thermoanalysis, IR, UV spectra and molar conductivity measurements. Preliminary biological tests showed that complexes 1（CuL2Cl2（R=CH3）） and 5（ZnL2Cl2（R=n-C3H7）） exhibited a certain weeding activity against wheat and barnyard grass.
文摘A new high activated organic weedicide quinclorac (3,7-dicholoro-8-quinoxylic acid) was presented, and the optimal synthesis condition of the key step-Skraup cyclization was developed. A new synthesis process by using the catalyst of KI was set up,and the yield increased to 95 5%. The relationship between structure and activity of quinclorac and its derivatives was studied to find more active and more mild weedicide, 12 derivatives of this acid were synthesized, and the biological activities of all these compounds were detected, the QSAR equation of this series of compounds was established by Hansch method, which shows that the biological activity is linearly correlated with parameters L, M R, B 1, B 2 and B 4, and -CH 2-CH=CH 2 substituted quinclorac ester was more active and more mild weedicide analysised from QSAR equation.
