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Controlling selectivity of the reactions of aromatic aldehydes and 2-aminobenzamide in ionic liquid catalyzed by iodine at either room temperature or at 80 °C under nitrogen resulted in the synthesis of (E)-Schiff bases, 2,3-dihydro-2-arylquinazolin-4(1H)-one and 2-arylquinazolin-4(3H)-one derivatives, in excellent yields. 相似文献
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A convenient one-pot synthesis of benzo[f]pyrimido[4,5-b]quinoline derivatives is described via three-component reaction of benzaldehydes, naphthalen-2-amine, and barbituric acid at room temperature in aqueous media catalyzed by iodine. Compared with other methods, this three-component reaction used a green solvent, gave good yields, and was operationally simple. 相似文献
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利用水热法,以2-(4-羧基-苯基)咪唑-4,5-二羧酸(H3L)为主配体,在辅配体1,10-菲咯啉(1,10-phen)和1,4-二(1-咪唑基)苯(dib)的调控作用下得到2个新的镉(Ⅱ)配合物:[Cd2(HL)2(1,10-phen)2(H2O)2](1),{[Cd (HL)(dib)0.5(H2O)2]·2H2O}n(2)。并通过单晶X射线衍射、元素分析、热重分析、粉末X射线衍射、红外光谱、Hirshfeld表面分析和密度泛函理论量化计算对1和2进行了分析和表征。配合物1和2均属于三斜晶系和P1空间群,且1为零维结构,2为一维链状结构。 相似文献
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新型PES微孔材料的制备及性能研究 总被引:1,自引:1,他引:0
合成了新型双烯丙基聚醚砜(PES), 采用超临界CO2作为物理发泡试剂制备微孔材料, 研究了不同发泡温度、饱和压力、发泡时间和放气时间等因素对微孔形貌的影响. 结果表明, 发泡温度在110~170 ℃之间, 随着温度的升高, 泡孔直径增加, 泡孔密度在140 ℃达到一个最大值; 随着饱和压力的升高, 泡孔直径减小, 泡孔密度增大; 发泡时间和放气时间对微孔直径和密度影响不大; 研究了在不同辐照剂量下微孔材料的交联性能, 结果表明, 在600 kGy辐照剂量以下, 交联效果不明显, 在800 kGy以上, 随着辐照剂量的增大, 凝胶含量增加, 辐照后的样品在265 ℃热处理10 min, 仍能保持完好的微孔结构. 相似文献
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WU Mei-Mei CHEN Zhong-Ning 《结构化学》2004,(10)
1 INTRODUCTION Over the past decades, metal alkynyl complexes have attracted more and more attention due to their potential applications in conducting polymers, lumi- nescent materials and supramolecular chemis- try[1~10]. Compared to the rapid growth o… 相似文献
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Group 4 metallacycles [eta5:sigma-Me2C(C5H4)(C2B10H10)]Ti[eta2-N(Me)CH2CH2N(Me)] (1a), [eta5:sigma-Me2C(C5H4)(C2B10H10)]Zr[eta2-N(Me)CH2CH2N(Me)](HNMe2) (1b) and [eta5:sigma-Me2C(C5H4)(C2B10H10)]M[eta2-N(Me)CH2CH2CH2N(Me)] (M = Ti (2a), Zr (2b), Hf (2c)) were synthesized by reaction of [eta5:sigma-Me2C(C5H4)(C2B10H10)]M(NMe2)(2) (M = Ti, Zr, Hf) with MeNH(CH2)(n)NHMe (n = 2, 3). These metal complexes reacted with unsaturated molecules such as 2,6-Me2C6H3NC, PhNCO and PhCN to give exclusively M-N bond insertion products. The M-C(cage) bond remained intact. Such a preference of M-N over M-C(cage) insertion is suggested to most likely be governed by steric factors, and the mobility of the migratory groups plays no obvious role in the reactions. This work also shows that the insertion of unsaturated molecules into the metallacycles is a useful and effective method for the construction of very large ring systems. 相似文献