Abstract:Cdour Reaction of 3,5-Diacyl-2,6-heptanediones with Glyane Esters The 1.5-diketone 3 reacts with glycine esters at room temp. to yield the tetrahydroquinolines 5. At lower temp. the reaction stops at the stage of the N-alkylated 1,4-dihydropyridine (DHP) 4. 4 is also formed by the reaction of glycine esters with acetylacetone and formaldehyde in aqueous pyridine. Neither 4 nor 5 are identical with the product of the photometric assay from the colour rcaction of Pesez 2'3). The DHP 7 are obtained from the 1.5-d… Show more
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