Magnetic Fe3O4-supported sulfonic acid-functionalized graphene oxide (Fe3O4@GO-naphthalene-SO3H): a novel and recyclable nanocatalyst for green one-pot synthesis of 5-oxo-dihydropyrano[3,2-c]chromenes and 2-amino-3-cyano-1,4,5,6-tetrahydropyrano[3,2-c]quinolin-5-ones
作者:Masoud Khaleghi-Abbasabadi、Davood Azarifar
DOI:10.1007/s11164-018-03722-y
日期:2019.4
efficiency of these nanoparticles as recyclable nanocatalyst was explored in one-pot three-component reaction between aldehydes, malononitrile, and 4-hydroxyquinolin-2(1 H )-one or 4-hydroxycoumarin under green conditions in water for the synthesis of 2-amino-3-cyano-1,4,5,6-tetrahydropyrano[3,2- c ]quinolin-5-ones and 5-oxo-dihydropyrano[3,2- c ]chromenes (coumarins) respectively. High yields of the
摘要描述 了一种通过三步法合成新型的磁性的1-萘磺酸接枝的氧化石墨烯(Fe 3 O 4 -GO-萘-SO 3 H)。通过X射线衍射,能量色散X射线,振动样品磁力计,扫描电子显微镜,傅立叶变换红外光谱,拉曼光谱和热重分析技术,充分表征了这种新合成的纳米氧化石墨烯的结构。在醛,丙二腈和4-羟基喹啉-2(1 H) 之间的一锅三组分反应中探索了这些纳米颗粒作为可回收纳米催化剂的催化效率。 )或4-羟基香豆素在绿色条件下在水中合成2-氨基-3-氰基-1,4,5,6-四氢吡喃并[3,2 - c ]喹啉-5-酮和5-氧代-二氢吡喃并[3,2- c ]色烯(香豆素)。该方案的主要优点是产品收率高,反应时间短,催化剂易于制备以及将水用作绿色溶剂。另外,催化剂可以简单地通过使用磁体容易地分离,并且可以重复使用六次而不会显着降低活性。 图形概要
The hydrogen bonding in 2-amino-3-cyano-4-(3-nitrophenyl)-4,6-dihydro-5H-pyrano[3,2-c]quinolin-5-one N,N-dimethylformamide solvate monohydrate
The crystal structure of 2-amino-3-cyano-4,6-dihydro-4-(3-nitrophenyl)-5H-pyrano[3,2-c]quinolin-5-one N,N-dimethylformamide solvate monohydrate is determined by room temperature X-ray diffraction. The title compound 1, C22H21N5O6, is triclinic, space group P-1, a=9.109(2) Å, b=11.340(2) Å, c=12.485(2) Å, α=70.02(1)°, β=69.36(1)°, γ=67.32(1)°, Z=2, V=1081.4(4) Å3. It is interesting that a bridge-like hydrogen bond O–H···O is formed between the title compound and solvent molecules of water with molecular ratio of 2:2 building a bi-layer framework. In addition, there are two other types of classical hydrogen bonds N–H···N and N–H···O in the crystal structure.
Simple, Catalyst-Free, One-Pot Procedure for the Synthesis of 2-Amino-3-cyano-1,4,5,6-tetrahydropyrano[3,2-c]quinolin-5-one Derivatives
作者:Meng-Jian Yao、Zhi Guan、Yan-Hong He
DOI:10.1080/00397911.2012.686647
日期:2013.8.3
Abstract A one-pot, three-component reaction of 4-hydroxyquinolin-2(1H)-one, malononitrile, and various aldehydes for the synthesis of 2-amino-3-cyano-1,4,5,6-tetrahydropyrano[3,2-c]quinolin-5-one derivatives is reported. The reaction is performed without any catalysts in a mixed solvent of water and ethanol to give products in good yields. The present method provided a clean, simple, and economical
本发明涉及医药化工领域,具体的公开了一种医药中间体2‑氨基‑四氢吡喃并[3,2‑ c ]喹啉‑5‑酮衍生物的制备方法,该制备方法以醛、活泼亚甲基化合物和4‑羟基喹啉‑2酮作为反应原料,以固载碱性离子液体为催化剂,乙醇水溶液作为反应溶剂进行制备。该体系制备2‑氨基‑四氢吡喃并[3,2‑ c ]喹啉‑5‑酮衍生物时的催化活性较高,在温和的条件下可以很大程度上减少反应所需要的时间。