One equivalent of BH3 can hydroborate up to 3 equivalents of alkene. BH3-THF is the same as BH3. … Notes: Example 1 just shows a simple anti-Markovnikov addition of BH3 to an alkene. Examples 2 and 3 show the hydroboration of a cyclic alkene.

What does BH3 THF reduce?

Borane Complexes: BH3•L In addition, borane rapidly reduces aldehydes, ketones, and alkenes. Borane is commercially available as a complex with tetrahydrofuran (THF) or dimethysulfide in solution.

What does BH3 THF do to a carboxylic acid?

The reducing characteristics of diborane (disassociated to BH3 in ether or THF solution) were first introduced as addition reactions to alkenes and alkynes. This remains a primary application of this reagent, but it also effects rapid and complete reduction of carboxylic acids, amides and nitriles.