Question

Why doesn't grignard reagent extracts the alpha hydrogen in ketones and aldehydes?

Answer 1

Answer:

This question already has an answer here: • Why do Organolithium or Grignard reagents act as nucleophiles and not as bases with aldehydes and ketogenic

Answer 2

Furthermore, the carbon atom of the aldehyde is way more electrophilic than the hydrogen atom bound to the alpha carbon, that is the main reason why the enolate end up being formed in very small amounts and sometimes you don't even detect it.