This paper describes the synthesis of the novel phosphonato esters from the reaction of
dialkyl acetylenedicarboxylates with the N–H acid (4-methylphenyl)sulfonyl hydrazide in the
presence of trialkyl(aryl) phosphites at room temperature in excellent yields.
Keywords: (4-Methylphenyl)sulfonyl hydrazide, stereoselective synthesis, acetylenic esters, trialkyl(aryl) phosphites, phosphonates.
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