Water Assisted and Choline Chloride-Dimethylurea Deep Eutectic Salts as Catalyst towards the Attractive Reaction of Indole, Benzaldehyde, and Malononitrile
摘要:
The condensation of indole, benzaldehyde, and malononitrile was relatively rigorous compared with other Yonemitsu type reaction. We described a strategy using catalytic amount of choline chloride-dimethylurea deep eutectic salts as cheap and safe accelerator. We also found that introducing right amount of water in reaction system was crucial. This method tolerates variations in all three components to get desired 3-substituted indoles in satisfactory yields.
An efficient three-component reaction of indole, aldehyde, and malononitrile in water catalyzed by a copper(II) sulfonato Salen complex afforded 3-indole derivatives in good to excellent yields up to 97%.
Efficient Synthesis of 3-Substituted Indoles via a Base-Free Copper-Catalysed Three-Component Reaction in Water
作者:Haojie Jiang、Leilei Wang、Jianwei Xie
DOI:10.3184/174751916x14622783380474
日期:2016.6
The preparation of sixteen 3-substituted indoles in good to excellent yields under environmentally friendly conditions has been achieved via a three-componentreaction in water of an indole, an aldehyde and malononitrile (or ethyl 2-cyanoacetate) catalysed by 5 mol% of 2-pyrrolecarbaldiminato-Cu(II).
Polyethylene glycol (PEG-200)-promoted sustainable one-pot three-component synthesis of 3-indole derivatives in water
作者:Leilei Wang、Manna Huang、Xinhai Zhu、Yiqian Wan
DOI:10.1016/j.apcata.2012.12.008
日期:2013.3
A sustainable three-component reaction of indoles, aldehydes, and malononitrile in water promoted by polyethyleneglycol (PEG-200) afforded 3-indole derivatives in good to excellent yields.
Water Assisted and Choline Chloride-Dimethylurea Deep Eutectic Salts as Catalyst towards the Attractive Reaction of Indole, Benzaldehyde, and Malononitrile
The condensation of indole, benzaldehyde, and malononitrile was relatively rigorous compared with other Yonemitsu type reaction. We described a strategy using catalytic amount of choline chloride-dimethylurea deep eutectic salts as cheap and safe accelerator. We also found that introducing right amount of water in reaction system was crucial. This method tolerates variations in all three components to get desired 3-substituted indoles in satisfactory yields.