Journal of Organic Chemistry p. 3488 - 3490 (1986)
Update date:2022-08-16
Topics:
Degenhardt, Charles R.
Burdsall, Don C.
A new method for the preparation of tetraalkyl ethenylidenebis(phosphonates) has been developed.This two-step procedure involves the base-catalyzed reaction of a methylenebis(phosphonate) ester with paraformaldehyde followed by acid-catalyzed elimination of methanol.The effects of variations in the reaction conditions of the first step of this process are described.Ethenylidenebis(phosphonate) esters can be converted to the free acid by reaction with bromotrimethylsilane.
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