Novel Cyanoketene N,S‐Acetals and Pyrazole Derivatives Using Potassium 2‐Cyanoethylene‐1‐thiolates.
2008
Abstract Novel ketene N,S‐acetals 3 were readily prepared by the reaction of cyanoacetamide or cyanothioacetamide with phenylisothiocyanate in the presence of potassium hydroxide, followed by alkylation of the produced salts with methyl iodide. The reaction of compounds 3 with hydrazines afforded different substituted pyrazoles 6.
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