Ring size and nothing else matters: unusual regioselectivity of alkyne hydration by NHC gold(i) complexes†
Sergey A.
Rzhevskiy, 
a
Gleb A.
Chesnokov,
a
Alexandra A.
Ageshina,
a
Maxim A.
Topchiy,
a
Mikhail S.
Nechaev
ab
and
Andrey F.
Asachenko
*a
a
Gleb A.
Chesnokov,
a
Alexandra A.
Ageshina,
a
Maxim A.
Topchiy,
a
Mikhail S.
Nechaev
ab
and
Andrey F.
Asachenko
*a
Abstract
We have investigated the role of ring sizes and substituents in NHC ligands in some (NHC)Au(I) complexes in the hydration of internal alkynes. Despite the fact that using (NHC)Au(I) complexes in the hydration of diarylacetylenes leads to Markovnikov-type products, the precise tuning of ligands allows changing the regioselectivity in arylalkylacetylene hydration to the anti-Markovnikov-type.
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