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|Title:||New tandem reactions for the construction of heterocycles via dianion strategy|
|Authors:||Singh, M S|
|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.|
|Appears in Collections:||IJC-B Vol.47B(05) [May 2008]|
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