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The Knoevenagel reaction of aromatic and heteroaromatic aldehydes with cyanothioacetamides affords a-cyanothioacrylamides (126), which easily undergo thermal dimerization to 3,4-dihydro-2//-thio-pyrans (127). a-Keto-substituted acrylonitriles are synthesized by condensation of p-keto nitriles with aldehydes or ketones. - Benzoylacetonitrile self-condenses to afford (128), which can be transformed... [Pg.361]

See other pages where Nitriles, 3-keto Knoevenagel reaction is mentioned: [Pg.93] [Pg.93] [Pg.360] [Pg.360] [Pg.360]