In this Stork enamine reaction, cyclohexanone is reacted with pyrrolidine in the presence of p-TsOH catalysis to produce an enamine. This enamine undergoes.
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The imine is then reacted with an Grignard reagent to the corresponding magnesium salt to an intermediate capable of displacing a halide.
Hydrolysis once again yields the reatcion ketone. Enamines, like other weak bases, add 1,4 to enones. These reactions are generally known as the Stork enamine reaction after Gilbert Stork of Columbia University who originated the work. This page was last edited on 6 Aprilat The iminium salt can be hydrolyzed back into the carbonyl.
Views Read Edit View history. The Stork enamine alkylationinvolves the addition of an enamine to an alpha, beta-unsaturated carbonyl acceptor in a process similar to the Michael reaction. Carbon-carbon bond forming reactions Name reactions. In other projects Wikimedia Commons.
The end product is a 1,5 enamkne compound. Steven Farmer Sonoma State University. Because of this enamines can be used as synthetic equivalents as enolates in many reactions. In a special case of this reaction type it is also possible to alkylate ketones or aldehydes with alkyl halides as less reactive electrophiles: Use dmy dates from June Reactions, Mechanisms, and Structure 3rd ed.
Stork Enamine Reaction – ChemistryScore
Enamines act as nucleophiles in a fashion similar to enolates. Stkrk Addition using Enamines Enamines, like other weak bases, add 1,4 to enones. In this method a carbonyl compound is converted to an imine by alkylimino-de-oxo-bisubstitution with a primary amine. Enamined undergo an S N 2 reaction with reactive alkyl halides to give the iminium salt.
Organic Chemistry Hardcover 6th ed. Retrieved from ” https: Formation of an enamine Step 2: Alkylation of an Enamine Enamined undergo an S N 2 reaction with reactive alkyl halides to give the iminium salt. From Wikipedia, the free encyclopedia.
When the electrophile is an acyl halide enaimne, a 1,3- diketone is formed Stork acylation.