Title of article
Mineral supported syntheses of benzoxazine-2-thiones under microwave irradiation
Author/Authors
Lal Dhar S. Yadav، نويسنده , , Beerendra S. Yadav، نويسنده , , Suman Dubey، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2004
Pages
6
From page
131
To page
136
Abstract
An original montmorillonite K-10 clay catalysed cycloisomerisation of salicylaldehyde 4-arylthiosemicarbazones yields 3,4-dihydro-4-hydrazino-2H-benz[e]-1,3-oxazine-2-thiones, which on reductive dehydrazination on alumina-supported copper(II) sulfate readily furnish 3,4-dihydro-2H-benz[e]-1,3-oxazine-2-thiones under solvent-free microwave irradiation. Under the same conditions salicylaldehyde thiosemicarbazones undergo cyclodehydrazination to yield 2H-benz[e]-1,3-oxazine-2-thiones.
Keywords
solvent free , Salicylaldehyde thiosemicarbazones , Mineral supported , Microwaves , Benzoxazine-2-thiones
Journal title
Tetrahedron
Serial Year
2004
Journal title
Tetrahedron
Record number
1084620
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