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Title: New tandem reactions for the construction of heterocycles via dianion strategy
Authors: Singh, M S
Singh, Pratibha
Singh, Pallavi
Keywords: N-(2-Hydroxymethylphenyl)salicylideneimine;(+/-)-N,N′-bis(salicylidene)-trans-1,2-diaminocyclohexanedianion;Dioxazaphosphadecines;Dioxadiazaphosphatridecines
Issue Date: May-2008
Publisher: CSIR
Abstract: 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.
Page(s): 767-772
ISSN: 0376-4699
Appears in Collections:IJC-B Vol.47B(05) [May 2008]

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