含四唑环Schiff碱的合成与植物激素活性

以 5 氨基 1H 1 ,2 ,3,4 四唑与芳醛反应合成出五种新的Schiff碱 ,对其产率、物理性质、紫外光谱、红外光谱、质子的核磁共振谱及元素分析首次作了讨论 ,初步的生物活性测试试验证明 ,此类Schiff碱表现出显著的植物激素活性 ,一些化合物的生长素活性与生根性能优良。

3,4—环四次甲基吡唑酮-5的半导体性能与两性离子型结构

某些含氮杂环化合物，其中包括研究得较详的斯德酮类(Sydnones)，它们的芳香性格系来自两性离子型的分子结构。已有不少的工作支持这种概括性的意见。例如，Hill和Sutton(1)发现了一些芳基和烷基斯德酮的6．6D左右的偶极矩及其负极指向，deStevens(2)根据红外光谱的测定结果，较前人更为中肯地提出了某些吡唑酮类化合物的两性离子型结构的论点。

Environmentally friendly, microwave-assisted synthesis of 5-substituted 1H-tetrazoles by recyclable CuO nanoparticles via(3+2) cycloaddition of nitriles and NaN_3

Recyclable CuO nanoparticles were successfully employed to catalyze the microwave‐assisted(3+2)cycloaddition reaction between nitriles and NaN3to efficiently synthesize5‐substituted1H‐tetrazoles.The salient features associated with this protocol are its cost effectiveness,rapid synthesis,stability,reusability,mild reaction conditions without any additives,high tolerance to various functional groups,and excellent yields under microwave irradiation.This environmentally friendly,microwave‐assisted,nanoparticle‐catalyzed synthetic methodology is seen as an alternative to conventional procedures that involve Lewis acid catalysts and a simple operation to the privileged scaffold.

Synthesis and Crystal Structure of 2,2-Pentamethylene-1,2,3,4-tetrahydroquinazolin-4-one

The title compound 2,2-pentamethylene-1,2,3,4-tetrahydroquinazolin-4-one is of monoclinic, space group P21/n with a = 10.387(1), b = 10.954(2), c = 10.827(2) ? b = 110.77(1), C13H16N2O, Mr = 216.28, Z = 4, V = 1151.8(4) 3, Dc = 1.247 g/cm3, m(MoKa) = 0.080 mm-1, F(000) = 464, R = 0.0499 and wR = 0.1217 for 1575 observed reflections (I > 2s(I)). X-ray analysis reveals that the pyrimidine and cyclohexane rings adopt half-chair and chair configurations, respectively. In addition, there exists an intermolecular hydrogen bond (N(1)H(1)…O) in the product molecule.

Zinc-assisted synthesis of imidazolium-tetrazolate bi-heterocyclic zwitterions with variable alkyl bridge length

Zinc halide-complexed alkyl-bridged bi-heterocycles were obtained as zwitterions from the Click reaction of a series of N-cyanoalkyl-N-alkylimidazolium halide ionic liquids with sodium azide. Reaction optimization showed fast reaction times and milder conditions compared to conventional Click syntheses from neutral nitriles.