Synthesis, Crystal Structure and Herbicidal Activity of N-(7-Chloro-5-ethoxy-2H-[1,2,4]thiadiazolo[2,3-a] pyrimidin-2-ylidene)-2-(2,4-dichlorophenoxy)propanamide

摘要

The title compound N-(7-chloro-5-ethoxy-2H-[1,2,4]thiadiazolo[2,3-a]pyrimidin-2-ylidene)- 2-(2,4-dichlorophenoxy)propanamide 3 has been synthesized through using bromine as cyclic reagent in 63% isolated yield. Suitable single crystals for X-ray diffraction were obtained by recrystallization from the mixture solvents at room temperature. Crystallographic data of 3: C_(16)H_(13)-Cl_3O_3S, M_r = 447.71, triclinic, space group P1,a = 8.7461(8), b = 9.9560(10), c = 11.8572(11) A, α = 94.341 (2), β = 94.683(2), γ = 112.929(2)°, Z= 2, V= 941.21(15) A~3, D_c = 1.580 g/cm~3, F(000) = 456, R = 0.0794, wR = 0.2056 and μ(MoKα) = 0.623 mm~(-1). The title compound 3 was found to be effective in herbicidal activity.