Does Anti-Markovnikov behaviour extend only to additions to alkenes?
Anti-Markovnikov behaviour extends to other chemical reactions than additions to alkenes, but they are relatively rare.
For example, the hydration of phenylacetylene gives acetophenone in a Markovnikov addition.
But hydration in the presence of a complex ruthenium catalyst gives phenylacetaldehyde in an anti-Markovnikov addition.
A few other anti-Markovnikov reactions involving transition metal catalysts are also known.