4-Dimethylaminopyridine-catalyzed multi-component one-pot reactions for the convenient synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivatives
作者:Jun Feng、Keyume Ablajan、Ahat Sali
DOI:10.1016/j.tet.2013.11.019
日期:2014.1
reaction process was developed for the convenient and cheap synthesis of spirooxindole derivatives. One-pot reactions of isatins, malononitrile (or ethyl cyanoacetate), hydrazine hydrate (or phenylhydrazine), and 1,3-dicarbonyl compounds were compared with one-pot reactions of isatins, malononitrile (or ethyl cyanoacetate), and 5-pyrazolone derivatives. Both sets of reaction were conducted in EtOH in the
开发了一种有效且清洁的反应过程,以方便且廉价地合成螺并吲哚衍生物。比较了靛红,丙二腈(或氰基乙酸乙酯),水合肼(或苯肼)和1,3-二羰基化合物的一锅法反应与靛红,丙二腈(或氰基乙酸乙酯)和5-吡唑啉酮衍生物的一锅法反应。 。两组反应均在4-DMAP催化剂存在下于EtOH中进行。使用四组分一锅法快速快速获得了一系列螺[吲哚啉-3,4'-吡喃并[2,3- c ]吡唑]衍生物。
Rapid and Efficient Ultrasound-Assisted Method for the Combinatorial Synthesis of Spiro[indoline-3,4′-pyrano[2,3-<i>c</i>]pyrazole] Derivatives
作者:Yi Zou、Yu Hu、Hai Liu、Daqing Shi
DOI:10.1021/co200128k
日期:2012.1.9
An efficient one-pot synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivatives by four-component reaction of hydrazine, β-keto ester, isatin, and malononitrile or ethyl cyanoacetate catalyzed by piperidine under ultrasound irradiation is described. This synthesis was confirmed to follow the group-assistant-purification chemistry (GAP) chemistry process, which can avoid traditional chromatography
哌啶催化肼,β-酮酸酯,靛红和丙二腈或氰基乙酸乙酯的四组分反应,有效地一锅合成螺[吲哚啉-3,4'-吡喃并[2,3- c ]吡唑]衍生物描述在超声波照射下。确认该合成遵循组辅助纯化化学(GAP)化学过程,可以避免传统的色谱纯化和重结晶纯化。
An Efficient One Pot Four-Component Synthesis of
Spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] Derivatives via Electrochemical Approach
作者:Abhishek Upadhyay、R.K.P. Singh
DOI:10.14233/ajchem.2021.23196
日期:——
An efficient, simple and one pot, synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivative by electrochemically induced condensation of β-keto ester, hydrazine hydrate, malononitrile or ethyl cyanoacetate and isatin in an undivided cell at constant current where sodium bromide was present as electrolyte in ethanol medium.
A clean and one-pot synthesis of spiroindoline-pyranopyrazoles
作者:Somayeh Ahadi、Zahra Yasaei、Ayoob Bazgir
DOI:10.1002/jhet.437
日期:——
Abstractmagnified image Piperidine catalyzes efficiently the one‐pot, four‐component reaction of β‐ketoesters, hydrazine hydrate, malononitrile, and isatines in aqueous media. The reaction was done at room temperature and the spiro[indoline‐3,4′‐pyrano[2,3‐c]pyrazole]‐5′‐carbonitriles were obtained with high yields and purity via an easy work‐up procedure. These compounds were also investigated in vitro for antibacterial activities. J. Heterocyclic Chem., (2010).