Alkyne Hydroboration - Clarification

[jefff]

so hydroboration via 1. BH3 THF/ 2. H2O2/H2O, OH- of:

internal alkyne --> enol and will tautomerize into a ketone
therefore 2 products?

could they have us choose btwn an enol and a ketone?


terminal alkyne --> enol and will tautomerize into a aldehyde
therefore 2 products?

could they have us choose btwn an enol and an aldehyde?

 

[FROGGBUSTER]

so hydroboration via 1. BH3 THF/ 2. H2O2/H2O, OH- of:

internal alkyne --> enol and will tautomerize into a ketone
therefore 2 products?

could they have us choose btwn an enol and a ketone?

They won't do that, there will be more ketone than enol though. Maybe they could ask which is the major product? Choose ketone.

terminal alkyne --> enol and will tautomerize into a aldehyde
therefore 2 products?

could they have us choose btwn an enol and an aldehyde?

Again, probably not, but aldehyde = major product.

 

[jefff]

Awesome, thanks!