A facile synthetic approach to novel spiro-oxindoles/acenaphthylen-1-ones containing benzo[1,4]thiazin-3-one ring via 1,3-dipolar cycloaddition
作者:Neelakandan Vidhya Lakshmi、Rajendren Tamilisai、Paramasivan T. Perumal
DOI:10.1016/j.tetlet.2011.08.003
日期:2011.10
A series of spiro-oxindole derivatives containing spirobenzol[1,4]thiazin-3-one ring were synthesized regioselectively via a multicomponent 1,3-dipolar cycloaddition of isatin, 2-(4-methyl-benzylidene)-4H-benzo[1,4]thiazin-3-one and sarcosine or L-proline in toluene under reflux condition. Also spiro-acenaphthylen-1-ones containing spirobenzo[1,4]thiazin-3-one ring have been synthesized using 2-(4-methyl-benzylidene)-4H-benzo[1,4]thiazin-3-one as dipolarophile. The methodology affords high yields of products in short reaction time. (C) 2011 Elsevier Ltd. All rights reserved.