Question

when alpha-bromo ister an aldehyde or ketone is treated in presence of zinc and dry ether it result in alpha,beta unsaturated this reaction is known as___________​

Answer 1

Answer:

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Answer 2

REFORMATSKY REACTION

When alpha-bromo ester an aldehyde or ketone is treated in presence of zinc and dry ether it result in alpha beta unsaturated this reaction is known as REFORMATSKY REACTION.

GETTING TO KNOW MORE ABOUT REFORMATSKY REACTION:

* The Reformatsky reaction is an organic reaction that produces -hydroxy-esters by condensing aldehydes or ketones with -halo esters in the presence of metallic zinc.

* An alpha-halo ester is treated with zinc dust to produce the organozinc reagent, also known as a "Reformatsky enolate." Reformatsky enolates are less reactive than lithium enolates or Grignard reagents, and so there is no nucleophilic addition to the ester group.

* The crystal structures of the Reformatsky reagents tert-butyl bromozincacetate and ethyl bromozincacetate in their THF complexes have been determined. In the solid state, both form cyclic eight-membered dimers, but the stereochemistry differs:

* The eight-membered ring in the ethyl derivative adopts a tub-shaped conformation and contains cis bromo groups and cis THF ligands, whereas the ring in the tert-butyl derivative is in a chair form and contains cis bromo groups and cis THF ligands.