“On water” highly atom economical and rapid synthesis of a novel class of 3-hydroxy-2-oxindole scaffolds under a catalyst-free and column chromatography-free protocol at room temperature
Unprecedented, <scp>catalyst‐free,</scp> and rapid <scp>one‐pot</scp>, <scp>three‐component</scp> green synthesis of substituted 3‐hydroxy‐2‐oxindoles in water
作者:Mayur G. Patil、Ganesh A. Thakur、Rupashri K. Kadu、Pramod B. Thakur
DOI:10.1002/jhet.4737
日期:2023.12
An efficient, unprecedented, catalyst-free, and rapid synthesis of substituted 3-hydroxy-2-oxindoles is described by the one-pot, three-component reaction of hydrazine hydrate, ethyl acetoacetate, and isatins in water. The reported protocol is a green and general route for the simple preparation of new heteroaromatic substituted 3-hydroxy-2-oxindoles in quantitative yields under very mild reaction
“On water” highly atom economical and rapid synthesis of a novel class of 3-hydroxy-2-oxindole scaffolds under a catalyst-free and column chromatography-free protocol at room temperature
作者:Pramod B. Thakur、Harshadas M. Meshram
DOI:10.1039/c3ra46613b
日期:——
An âon waterâ highly atom economical and rapid protocol has been developed for the synthesis of a novel class of 3-(2-pyrazolin-5-one) substituted, 3-hydroxy-2-oxindole scaffolds under catalyst-free and column chromatography-free conditions at rt. The generality of the method has been demonstrated by screening a series of isatin electrophiles as well as 2-pyrazolin-5-one derivatives. The developed method is a good example of green synthesis in which straightforward synthesis of a medicinally important 3-hydroxy-2-oxindole framework is executed by employing very mild, simple and handy procedures from readily available starting materials.