An efficient, multicomponent synthesis of aminoalkylnaphthols via Betti reaction using ZSM‐5 as a recoverable and reusable catalyst
作者:Rangappa S. Keri、Mahadeo Patil、Srinivasa Budagumpi、Balappa S. Sasidhar
DOI:10.1002/aoc.6316
日期:2021.9
environmentally friendly catalysts to reduce the number of toxic wastes are critical for improving the chemical synthetic protocols. A simple, mild, efficient, and eco-friendly method was developed for the synthesis of a series of Betti bases, 1-(α-aminoalkyl)naphthols, via a one-pot, multi-component reaction from aldehydes, β-naphthol and secondary amines in the presence of H-ZSM-5 as a catalyst at room temperature
Metal-free new synthesis of 1,3-naphthoxazines via intramolecular cross dehydrogenative-coupling reaction of 1-(α-aminoalkyl)-2-naphthols using hypervalent iodine(III) reagent
作者:Nitin A. Waghmode、Amit H. Kalbandhe、Prerana B. Thorat、Nandkishor N. Karade
DOI:10.1016/j.tetlet.2015.12.117
日期:2016.2
A series of 1-(α-aminoalkyl)-2-naphthols were synthesized via three-component Betti reaction of β-naphthol, aldehyde, and cyclic secondary amine under reflux conditions. The subsequent reactions of 1-(α-aminoalkyl)-2-naphthols with (diacetoxyiodo)benzene resulted in the formation of 1,3-napthoxazines. This reaction demonstrates the formation of CO bond via cross dehydrogenative-coupling (CDC) under
Multicomponent reaction in deep eutectic solvent for synthesis of substituted 1-aminoalkyl-2-naphthols
作者:Najmedin Azizi、Mahtab Edrisi
DOI:10.1007/s11164-016-2628-2
日期:2017.1
One-pot multicomponent synthesis of Betti bases (aminoalkyl naphthols) from aldehydes, β-naphthol, and secondary amines in deepeutecticsolvent (DES) based on urea and choline chloride has been developed. A broad range of aminoalkyl naphthols can be obtained smoothly in good to excellent yield in biodegradable choline-chloride-based deepeutecticsolvent, being compatible with functional groups and
Supported copper triflate as an efficient catalytic system for the synthesis of highly functionalized 2-naphthol Mannich bases under solvent free condition
作者:Someshwar D. Dindulkar、Vedavati G. Puranik、Yeon Tae Jeong
DOI:10.1016/j.tetlet.2012.06.022
日期:2012.8
Various heterogeneous catalysts (Lewis acid) have been prepared and screened for the synthesis of Betti bases in an attempt to reduce the environmental hazards associated with the conventional homogeneous Lewis acid system. And we found especially Cu(OTf)(2)center dot SiO2 catalyzes the three-component coupling of aldehyde, 2-naphthol, and alicyclic amine to generate Betti base with high efficiency under neat conditions without additional co-catalyst or additive in air. The reaction is not sensitive to water and occurs smoothly in water as well. (c) 2012 Elsevier Ltd. All rights reserved.