Guareschi Thorpe Pyridine Synthesis

Baron et al j. Pyridine forms an n oxide with some oxidation agents such as hydrogen peroxide. 215 1 72 1882.
guareschi thorpe pyridine synthesis

In the guareschi thorpe condensation cyanoacetamide reacts with a 13 diketone to a 2 pyridone.

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Guareschi thorpe pyridine synthesis. The formed cyclic dicyanoimides are called the guareschi products and this reaction is known as the guareschi reaction. Organocatalytic modified guareschithorpe type regioselective synthesis. In a second type of synthesis a mixture of cyanoacetic ester and a ketone is treated.

The reaction is named after icilio guareschi and jocelyn field thorpe. Torino ii 46 7 11 25 1896. Hantzsch dihydropyridine synthesis pyridine synthesis a.

Aromatic pyridine synthesis guareschi previous. In a second type of synthesis a mixture of cyanoacetic ester and a ketone. This pyridine n oxide undergoes a rearrangement reaction to 2 pyridone in acetic anhydride.

Die guareschi reaktion oder guareschi thorpe pyridin synthese ist eine namensreaktion der organischen chemiesie dient der synthese von pyridin derivaten. Torino ii 46 7 11 25 1896. A unified direct access to 5678 tetrahydroquinolines and other alicyclicb fused pyridines.

10hammick alkylation of pyridine. Baron et al j. An unprecedented organocatalytic regioselective modified guareschithorpe type protocol toward the modular synthesis of 5678 tetrahydroquinolines 22ag and other alicyclicb fused pyridines 2328 via the identification of chitosan as a heterogeneous catalyst is reported.

Synthesis of dihydropyridines by condensation of two moles of a b dicarbonyl compound with one mole of an aldehyde in the presence of ammonia. Synthesis of derivatives by condensation of cyanoacetic ester with acetoacetic ester in the presence of ammonia. The preparation of pyridine derivatives by condensation of acetoacetic esters and cyanoacetic acids or its esters and amides in the presence of ammonia.

Die reaktion wurde das zunaechst 1896 vom italienischen chemiker icilio guareschi 18471918 vorgestellt und 1911 vom englischen chemiker jocelyn field thorpe 18721940 erweitert. Report error with mechanism. Organic letters 2018 20 19 6059 6063.

Synthesis of pyridine derivatives by condensation of cyanoacetic ester with acetoacetic ester in the presence of ammonia. This novel strategy is operationally simple and showed a wide range of functional group tolerance and substrate.

Guareschi Thorpe Pyridine Synthesis