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. S...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 16H13C13O3S, Mr = 447.71, triclinic, space group P1, a = 8.7461(8), b = 9.9560(10), c = 11.8572(11) A, a = 94.341(2), β = 94.683(2), γ = 112.929(2)°, Z = 2, V= 941.21(15) A^3, Dc = 1.580 g/cm^3, F(000) = 456, R = 0.0794, wR = 0.2056 andμ(MoKa) = 0.623 mm^-1. The title compound 3 was found to be effective in herbicidal activity.展开更多
Two novel chiral BINOL derivatives with bis(benzylamine) groups at the 3,3- positions have been synthesized through the condensation reaction between 2,2'-bis(methoxymethyleneoxy)-1,1'-binaphthyl-3,3'-dicarboxy...Two novel chiral BINOL derivatives with bis(benzylamine) groups at the 3,3- positions have been synthesized through the condensation reaction between 2,2'-bis(methoxymethyleneoxy)-1,1'-binaphthyl-3,3'-dicarboxylic acid and benzylamine or N-phenyl benzylamine in the presence of triethylamine. Suitable single crystal of (R)-N,N'-dibenzyl-2,2'-dihydroxy-1, 1'-binaphthly-3,3'-diformamide (R)-3 for X-ray diffraction was obtained by recrystallization at room temperature from the mixture solvents. Crystallographic data of (R)-3: C40H36N2O6, Mr = 640.71, monoclinic, space group P21, a = 6.746(3), b = 21.883(9), c = 11.723(5)A,β = 104.605(7)°, Z= 2, V= 1674.7(12)A^3, Dc = 1.271 g/cm^3, F(000) = 676, R = 0.0729, wR = 0.1687 andμ(MoKa) = 0.086 mm^-1. Two chiral BINOL ligands were found to be effective in the enantioselective addition of diethylzinc to aldehydes and much different enantioselectivity was observed both in the presence and absence of Ti(Oipr)4. in the former case, (R)-3 showed moderate enantioselectivity, which was lower than that of (R)-BINOL's; and in the latter case, (R)-4 gave the highest enantioselectivity up to 93.3% ee.展开更多
基金Supported by Shanghai Municipal Education Commission (No. 05D215)Shanghai Sciences and Technologies Development Fund (No. 05JC14074) National Natural Science Foundation of China (No. 20673072)
文摘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 16H13C13O3S, Mr = 447.71, triclinic, space group P1, a = 8.7461(8), b = 9.9560(10), c = 11.8572(11) A, a = 94.341(2), β = 94.683(2), γ = 112.929(2)°, Z = 2, V= 941.21(15) A^3, Dc = 1.580 g/cm^3, F(000) = 456, R = 0.0794, wR = 0.2056 andμ(MoKa) = 0.623 mm^-1. The title compound 3 was found to be effective in herbicidal activity.
基金Supported by Shanghai Municipal Education Commission (No. 05D215)Shanghai Sciences and Technologies Development Fund (No. 05JC14074)+1 种基金 National Natural Science Foundation of China (No. 20673072) Shanghai Leading Academic Discipline Project (No. T0402)
文摘Two novel chiral BINOL derivatives with bis(benzylamine) groups at the 3,3- positions have been synthesized through the condensation reaction between 2,2'-bis(methoxymethyleneoxy)-1,1'-binaphthyl-3,3'-dicarboxylic acid and benzylamine or N-phenyl benzylamine in the presence of triethylamine. Suitable single crystal of (R)-N,N'-dibenzyl-2,2'-dihydroxy-1, 1'-binaphthly-3,3'-diformamide (R)-3 for X-ray diffraction was obtained by recrystallization at room temperature from the mixture solvents. Crystallographic data of (R)-3: C40H36N2O6, Mr = 640.71, monoclinic, space group P21, a = 6.746(3), b = 21.883(9), c = 11.723(5)A,β = 104.605(7)°, Z= 2, V= 1674.7(12)A^3, Dc = 1.271 g/cm^3, F(000) = 676, R = 0.0729, wR = 0.1687 andμ(MoKa) = 0.086 mm^-1. Two chiral BINOL ligands were found to be effective in the enantioselective addition of diethylzinc to aldehydes and much different enantioselectivity was observed both in the presence and absence of Ti(Oipr)4. in the former case, (R)-3 showed moderate enantioselectivity, which was lower than that of (R)-BINOL's; and in the latter case, (R)-4 gave the highest enantioselectivity up to 93.3% ee.