A short time isomerisation for the synthesis of 3-ylideneoxindoles from Morita-Baylis-Hillman adduct of isatin derivatives with 1-hexyn-3-ol using FeCl3 and K-10 clay
作者:Vadivel Vaithiyanathan、Ganesan Ravichandran
DOI:10.1016/j.tetlet.2021.153212
日期:2021.7
3-ylideneoxindoles are synthesized from Morita-Baylis-Hillmanadduct of isatinderivatives with different alcohols using FeCl3 and K-10 clay under microwave irradiation. The reaction occurs in 3 min. As this work done with the help of FeCl3, K-10 clay and microwave irradiation for short time it is an eco-friendly green synthesis. The details of the work are elaborately discussed in this letter.
Synthesis of Highly Functionalized
Allene-Appended Oxindoles and 2-Oxo-1,2-dihydroindol-3-ylidene-2,5-dihydrofurans via
Claisen Rearrangement and Cyclization
Synthesis of highly functionalized allene appended oxin-dole derivatives from vinyl propargyl ether derivatives of Morita― Baylis―Hillman adducts of isatin via Claisen rearrangement has been achieved. Synthetic utility of the allene derivatives obtained has been demonstrated with the synthesis of methyl 2,5-dihydro-5-methyl-2-(1-methyl-2-oxoindolin-3-ylidene)furan-3-carboxylates in a one-pot cyclization
Stereoselective synthesis of 3-spiro-α-methylene-γ-butyrolactone oxindoles from Morita–Baylis–Hillman adducts of isatin
作者:Ponnusamy Shanmugam、Vadivel Vaithiyanathan
DOI:10.1016/j.tet.2008.02.002
日期:2008.4
concise stereoselective synthesis of 3-spiro-α-methylene-γ-butyrolactone oxindoles from Morita–Baylis–Hillmanadducts of isatin in excellent yield has been achieved following a three-step reaction sequences viz. (1) Isomerisation of the Morita–Baylis–Hillmanadducts of isatin with trimethyl orthoformate and montmorillonite K10 clay catalyst, (2) a second Morita–Baylis–Hillman reaction with formaldehyde
A facile, atom-economical, catalyst-free protocol for the hydrosulfonation of densely functionalized alkenes with sulfinic acids in an environmentally benign solvent system at ambient temperature is described.
Diisobutylaluminium hydride mediated efficient synthesis of Morita–Baylis–Hilman adducts through α‐functionalization of alkyl propiolates
作者:Sailam Sri Gogula、Ramakrishna Konakalla、Kamalaker Reddy Kamireddy、Muralidar Reddy Puchakayala、Ch. Abraham Lincoln、Venkata Subba Reddy Basireddy
DOI:10.1002/jhet.4602
日期:2023.3
Generally, oxindole derivatives are biologically important molecules and valuable building blocks in organic synthesis. Herein, we report a diisobutylaluminium hydride mediated efficient one-pot synthesis of oxindole derivatives using N-substituted isatins with methyl or ethyl propiolates at lower temperature (−78°C) through Morita-Baylis-Hillman (MBH) reaction. Within a short reaction time, a wide