1609669-77-3

Upstream product

• 54132-82-0 C₉H₁₆O₆P^(1-)*Na⁽¹⁺⁾ 
• 1073-70-7 4-chlorophenylhydrazine hydrochloride 

Downstream Products

• 1609669-82-0 C₁₃H₁₆ClN₂O₄P 
• 1609669-92-2 diethyl (2-(4-chlorophenyl)-1-methyl-3-oxopyrazolidin-4-yl)phosphonate 
• 1609669-57-9 2-(4-chlorophenyl)-1-methyl-4-methylenepyrazolidin-3-one 

Relevant academic research and scientific papers

Versatile synthesis of 4-methylidenepyrazolidin-3-ones using a Horner-Wadsworth-Emmons approach

A new, versatile method for the synthesis of, so far unknown, variously substituted 4-methylidenepyrazolidin-3-ones as potential cytotoxic agents is described. Target compounds were synthesized from the corresponding 4-diethoxyphosphorylpyrazolidin-3-ones which were used as Horner-Wadsworth- Emmons -reagents for the olefination of formaldehyde. 4-Phosphorylpyrazolidin-3- ones were, in turn, obtained starting from the sodium salt of ethyl 2-diethoxyphosphoryl-3-hydroxy-2-propenoate, ethyl 2-acyl-2- diethoxyphosphorylacetates, or 3-methoxy-2-diethoxyphosphorylacrylate and monosubstituted or 1,2-disubstituted hydrazines. Georg Thieme Verlag Stuttgart · New York.