【摘 要】
:
Sodium dihydrogen phosphate(NaH_2PO_4) efficiently catalyzes the condensation reaction of benzil,aldehydes,amines and ammonium acetate in a four-component react
【机 构】
:
Department of Chemistry,Islamic Azad University,
【出 处】
:
Chinese Chemical Letters
论文部分内容阅读
Sodium dihydrogen phosphate(NaH_2PO_4) efficiently catalyzes the condensation reaction of benzil,aldehydes,amines and ammonium acetate in a four-component reaction under solvent-free conditions.The reaction proceeds rapidly and affords the corresponding tetra-substituted imidazoles in high yields.Also an efficient route was developed for the synthesis of tri-substituted imidazoles from condensation of benzil,aldehydes and ammonium acetate using NaH_2PO_4.
Sodium dihydrogen phosphate (NaH 2 PO 4) efficiently catalyzes the condensation reaction of benzil, aldehydes, amines and ammonium acetate in a four-component reaction under solvent-free conditions. The reaction is rapidly and affords the corresponding tetra-substituted imidazoles in high yield. efficient route was developed for the synthesis of tri-substituted imidazoles from condensation of benzil, aldehydes and ammonium acetate using NaH 2 PO 4.
其他文献
本文提出了两种改进宽频带大功率速调管等激励功率-频率特性的方法。其一是在行波管推动级和速调管间加入具有一定衰减特性的带通滤波器,使之与速调管增益-频率特性互补,以获
Microstructure evolution and mechanical properties of the cast Mg-10Gd-3Y-1.2Zn-0.4Zr(mass fraction,%) alloy during annealing at 798 K for different time were i
9月26日,全省劳动保障宣传工作会议在威海召开。会议的主要任务是:深入贯彻党的十七大精神和党的宣传思想工作方针,交流劳动保障宣传工作经验,表彰劳动保障宣传工作先进单位
近几年我们在命题方面做了一些有益的尝试,最大的变化就是运用多元表征的转换对学生的数学学习进行考查.实验的几年中,老师和学生普遍反映,变化后的命题灵活度有一定的提升,
本文中的一些观点是根据1992年1月召开的航空技术专业会议上发表的文章提出的,并经机械工程学会委员会同意转载。作者提出了设备设计师必须考虑的一些关于避免电磁干扰的因素
A series of 2-amino-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidinyl substituted diaryl urea derivatives was designed and synthesized.Their in vitro cytotoxicities ag
The reaction of CoCl2·6H2O with 2,6-bis(N,N’-bis(2,6-diisopropyl-4-(2,3-dimethy-oxyl-benzoylamide)phenylimino))pyridine(L) afforded the complex [CoCl2L],which
Mediated electrochemistry of dimethyl sulfoxide reductase from Rhodobacter capsulatus (DMSOR) which is immobilized on a bare glassy carbon (GC) electrode and a
这次铁矿石大幅提价是由于国内资源类产品定价机制不合理。这种弊端,不仅使国内资源产品价格居高不下,一定程度上进一步加剧了供求紧张程度,而且成为国际资源垄断寡头对付中
中国奢侈品市场在成为全球最大市场可能的同时,也正面对没有一个真正意义上的本土品牌的尴尬。打造出中国本土品牌,已成为中国奢侈品行业的生死抉择。
While China’s luxur