A facile one-pot ultrasound assisted for an efficient synthesis of 1H-spiro[furo[3,4-b]pyridine-4,30-indoline]-3-carbonitriles

Authorsرامین قهرمان زاده,زهرا رشید,امیر حسن زرنانی,حسین نعیمی
JournalULTRASON SONOCHEM
Page number1451
Volume number21
IF4.321
Paper TypeFull Paper
Published At2014-02-11
Journal GradeScientific - research
Journal TypeElectronic
Journal CountryIran, Islamic Republic Of
Journal IndexISI ,SCOPUS

Abstract

A convenient one-pot protocol was developed for the synthesis of 1H-spiro[furo[3,4-b]pyridine-4,30-indoline]- 3-carbonitrile derivatives. This reaction was carried out through a three component condensation reaction of isatins, malononitrile, and anilinolactones in the presence of a catalytic amount of Et3N as an inexpensive and available basic catalyst in THF under ultrasound irradiation. The products were obtained in high yields and short reaction times. The main advantage of this synthetic method is that the obtained products in ultrasonic irradiations are different from classical heating.

tags: Multi-component reaction; Ultrasound; Spirooxindole; Malononitrile; Isatin; Tetronic acid