An unprecedented, one-step strategy for the synthesis
of 5-(methylthio)pyridazin-3(2H)-one derivatives
has been developed through iodine triggered
deaminative coupling of glycine esters with methyl ketones and hydrazine
hydrate in DMSO. These transformations in the absence of hydrazine
helped to generate different 3-methylthio-4-oxo-enoates in good yields.
Notably, DMSO played multiple roles such as oxidant, methylthiolating
reagent, and solvent.
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