Acetone cyanohydrin benzoin condensation

Generally benzoins are generated by the action of sodium cyanide or potassium cyanide on aromatic aldehydes in aqueous ethanol via cyanohydrin intermediates. Benzoins may also be prepared in good yields by treating aromatic aldehydes with potassium cyanide in the presence of crown ethers in water or aptotic solvents. Other sources for cyanide in this type of condensation are tetrabutylammonium cyanide, polymer-supported cyanide and acetone cyanohydrin with KaCOs. Similarly, addition of aromatic ddehydes to a,3-unsaturated ketones can be accomplished by means of cyanide catalysis in DMF.7... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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