期刊
ULTRASONICS SONOCHEMISTRY
卷 18, 期 1, 页码 49-53出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2010.05.016
关键词
Azomethine ylide; Spirooxindole; Spiroacenaphthen; Ultrasound irradiation; 1,3-Dipolar cycloaddition; Knoevenagel adduct
资金
- Shahid Beheshti University Research Council
Novel dicyano functionalised spiropyrrolidine and spiropyrrolizidine were synthesized from the reaction of various arylidenemalononitrile Knoevenagel adducts with non-stabilized azomethine ylides generated from isatin/acenaphthenequinone and sarcosine/N-phenylglycine/proline. The reactions were carried out under both conventional heating and ultrasonic irradiation conditions. In general, improvement in rates and yields were observed when the reactions were carried out under sonication compared with classical conditions. The regio and stereochemistry of the products was established by single crystal X-ray structure and spectroscopic techniques. (C) 2010 Elsevier B.V. All rights reserved.
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