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New tandem reactions for the construction of heterocycles via dianion strategy

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Title New tandem reactions for the construction of heterocycles via dianion strategy
 
Creator Singh, M S
Singh, Pratibha
Singh, Pallavi
 
Subject N-(2-Hydroxymethylphenyl)salicylideneimine
(+/-)-N,N′-bis(salicylidene)-trans-1,2-diaminocyclohexanedianion
Dioxazaphosphadecines
Dioxadiazaphosphatridecines
 
Description 767-772
The reaction of chiral and achiral salen ditopic ligands with sodium in dry isopropanol generates remote O,O-dianions. The dianions thus generated in situ are trapped by suitable phosphorus dielectrophiles to yield 2-oxo and 2-thioxo-1,3,7-dioxazaphosphadecines and 2-oxo and 2-thioxo-1,3,7,10-dioxadiazaphosphatridecines in moderate to good overall yield. The products are characterized by elemental and spectral (IR, ¹H, ¹³C, ³¹P NMR and Mass) studies. A plausible mechanistic logic and concept utilized in the synthesis have been discussed.
 
Date 2008-07-24T10:24:09Z
2008-07-24T10:24:09Z
2008-05
 
Type Article
 
Identifier 0376-4699
http://hdl.handle.net/123456789/1733
 
Language en_US
 
Publisher CSIR
 
Source IJCB Vol.47B(5) [May 2008]