One-pot, four-component synthesis of novel biologically important indeno[2,3-b]quinoxaline]-3-carbonitriles in fluoro-alcohols under ultrasound irradiation
作者:Mohammad Reza Poor Heravi、Fatemeh Norouzy
DOI:10.1007/s11164-017-2876-9
日期:2017.7
trifluoroethanol (TFE) as an efficient and recyclable medium in promoting one-pot, four-component synthesis of biologically and pharmacologically important spiropyrans and spiroquinoxalines from condensation of malononitrile or ethyl 2-cyanoacetate, ninhydrin, 1,2-phenylenediamine, 1,3-dicarbonyl compounds and 1- or 2-naphthol or naphthylamine under refluxing or ultrasoundirradiation at room temperature in
A one‐pot, four‐component reaction for the efficient synthesis of novel spiro[indeno[2,1‐b]quinoxaline‐11,4′‐pyran]‐2′‐amines by using InCl3 is described. The syntheses are achieved by reacting ninhydrin with 1,2‐diaminobenzenes to give indenoquinoxalines, which are trapped in situ by alkyl malonates and various α‐methylencarbonyl compounds through cyclization, providing multifunctionalized spiro‐substituted
描述了一种使用InCl 3有效合成新型螺[茚并[ 2,1- b ]喹喔啉-11,4'-吡喃] -2'-胺的单锅四组分反应。茚三酮与1,2-二氨基苯反应生成茚并喹喔啉,然后被丙二酸烷基酯和各种α-亚甲基羰基化合物通过环化作用原位捕获,从而提供了多官能螺取代的茚并[2,1 - b ]喹喔啉-11 ,4'-吡喃-2'-胺。
An efficient protocol for the synthesis of spiroindenoquinoxaline derivatives using novel NiFe2O4/Ag3PO4 as a nano magnetically heterogeneous catalyst
作者:Narges Hosseini Nasab、Javad Safari
DOI:10.1016/j.poly.2019.02.032
日期:2019.5
Abstract This work presents the one-pot, four component reaction for the synthesis and characterization of various spiro[indeno[1,2-b]quinoxaline-11,4-pyran]-2′-amine via ninhydrin, 1,2-phenylenediamine, malononitrile or ethylcyanoacetate and α-methylenecarbonyl compounds under reflux conditions by using NiFe2O4/Ag3PO4 as a novel magnetically reusable nanocatalyst. The structure and composition of
Silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (SB-DBU)Cl as a highly efficient, heterogeneous and recyclable silica-supported ionic liquid catalyst for the synthesis of benzo[b]pyran, bis(benzo[b]pyran) and spiro-pyran derivatives
The reaction of 3-chloropropyl silica (SilprCl) with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in dry acetone affords silica-bonded 5-n-propyl-octahydro-pyrimido[1,2-a]azepinium chloride (SB-DBU)Cl as a new silica-supported ionicliquid catalyst. Afterward, (SB-DBU)Cl is used for the efficientsynthesis of 4H-benzo[b]pyran derivatives via the one-pot, three-componentreaction of carbonyl compounds (cyclohexane-1
3-氯丙基二氧化硅(SilprCl)与1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)在干燥的丙酮中的反应得到二氧化硅键合的5-正丙基-八氢-嘧啶基[1,2- a]氯化ze嗪(SB-DBU)Cl作为新型的二氧化硅负载型离子液体催化剂。之后,(SB-DBU)Cl通过羰基化合物(环己烷-1,3-二酮,5,5-一锅法)的三锅法有效合成4 H-苯并[ b ]吡喃衍生物。(1,3-二甲基环己烷-1,3-二酮或3-甲基-1-苯基-2-吡唑啉-5-酮)与芳族醛和烷基丙二酸酯。此外,一些新颖的双(苯并[ b使用(SB-DBU)Cl合成[] pyran] s和在结构上含有羟吲哚和/或喹喔啉部分的多种结构多样的螺-吡喃。将催化剂循环使用十五次,收率不变。