Phosphonates containing sulfur and

Phosphonates Containing Sulfur and Selenium Synthesis, Reactions, and New Applications... 

The ambident behaviour of sulfur in terms of its ability to stabilize adjacent negative and positive charge at carbon has made this element a focal point for new reagents and reactions (JJ. For this reason our concern has focused on the synthesis of new phosphonates containing sulfur and selenium and the exploration of their application in synthetic and stereochemical studies. 

It was found (2 3) that the best synthetic approach to phosphonates containing sulfur and selenium in the a-position is based on the reaction of elemental sulfur and selenium with a-phos-phonate carbanions. It is interesting to note that, in contrast to sulfur, selenium may be added in this way to the tertiary carbon atom. 

Mikolajcz.yk, M., Balczewski, P., and Graczyk, P., Phosphonates containing sulfur and sihcon. New stereochemical and mechanistic aspects. Phosphorus Sulfur, 30, 225, 1987. 

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