How would you convert an aldehyde to a ketone?

Answer 1

You have to add another carbon residue. A Grignard reaction followed by workup and oxidation would give a ketone.

#i. R-C(=O)H + R'-MgBr rarr RC(-OMgBr)R'# #ii. R-CH(OMgBr)R' + H_2O rarr R-CH(OH)R' + MgBrOH# #iii. R-CH(OH)R' + [O] rarr RC(=O)R'#
The electrophilic aldehyde will react with a Grignard or lithium reagent to give a new #C-C# bond and (after workup) a secondary alcohol. The secondary alcohol can be easily oxidized by various means to give a ketone.
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Answer 2

An aldehyde can be converted to a ketone by using a mild oxidizing agent such as Tollens' reagent or Fehling's solution, or by heating it with a secondary alcohol in the presence of an acid catalyst.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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