Syntheses and Crystal Structures of Chiral BINOL Derivatives and Their Applications in Enantioselective Lewis Acid Catalyzed Addition of Diethylzinc to Aldehydes

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(methoxy- methyleneoxy)-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) , β = 104.605(7)°, Z = 2, V = 1674.7(12) 3, Dc = 1.271 g/cm3, F(000) = 676, R = 0.0729, wR = 0.1687 and μ(MoKα) = 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 enan- tioselectivity up to 93.3% ee.*     

α-{[4-(取代苯基亚甲基)亚氨基]苯氧基}丙酸乙酯的合成及植物生长调节活性

通过4．氨基苯氧丙酸乙酯与相应的取代芳香醛类化合物进行缩合反应得到了11个未见报道的α-{[4-(取代苯基亚甲基)亚氨基]苯氧基}丙酸乙酯类目标化合物,用UV、IR、~1H NMR和元素分析测试技术对其进行了表征。探讨了芳环上取代基对反应收率的影响,结果发现具有吸电子取代基的对硝基苯甲醛给出93％的最高反应产率:而有供电子取代基的对甲基苯甲醛给出54％的最低反应产率。初步生物活性测试证明,此类席夫碱化合物具有一定的植物生长调节活性:化合物6b和6f具有52％和55％的促黄瓜子叶生根活性,化合物6j具有75％的黄瓜子叶生根抑制活性;化合物6h具有53％的生长素活性;化合物6b具有51％的细胞分裂素活性。     

N''''-叔丁胺基羰基-N-取代菊酰硫脲类化合物的合成及生物活性测定

拟除虫菊酯类和酰基硫脲类化合物具有很好的杀虫，杀菌及植物生长调节活性。本文采用有效基团拼接方法，以拟除虫菊酯类化合物的活性部分即取代菊酸为母体，以酰基硫脲为骨架，并将叔丁基引入到该结构中，设计合成了4种N-     

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

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: C16H13- Cl3O3S, Mr = 447.71, triclinic, space group P, a = 8.7461(8), b = 9.9560(10), c = 11.8572(11) , α = 94.341(2), β = 94.683(2), γ = 112.929(2)o, Z = 2, V = 941.21(15) 3, Dc = 1.580 g/cm3, 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.     

N′-叔丁胺基羰基-N-取代菊酰硫脲类化合物的合成及生物活性测定

拟除虫菊酯类和酰基硫脲类化合物具有很好的杀虫 ,杀菌及植物生长调节活性[1 - 3] 。本文采用有效基团拼接方法 ,以拟除虫菊酯类化合物的活性部分即取代菊酸为母体 ,以酰基硫脲为骨架 ,并将叔丁基引入到该结构中 ,设计合成了 4种N 叔丁胺基羰基 N 取代菊酰硫脲类化合物。结构经1 HNMR ,IR和元素分析表征 ,初步的生物活性测定结果表明该类化合物具有较好的生物活性合成路线为 ,其结构简式如下发 :1　实验部分1 1　仪器和试剂XT4A型显微熔点测定仪 ;Nicolet5DXFT IR型红外光谱仪 (KBr压片 ) ;joelFX 90Q型超导核磁仪 (CDCl3作溶…