The compounds with
a quaternary α-aryl aldehyde skeleton
are important units in organic chemistry. Previously, the aryl group
and carbonyl group are introduced in a stepwise manner. Herein, a
novel route is developed to construct the quaternary α-aryl
aldehydes with gem-bis(boronates) as precursors,
in which the two groups are installed simultaneously. The gem-bis(boronates) are readily available from ketones; as
a result, this methodology provides a more general strategy to produce
the quaternary α-aryl aldehydes with broad scopes and synthetic
convenience.
A transformation of gem-bis(boronate) compounds with different electrophiles through a tertiary boronate intermediate to concurrently introduce aldehyde and allylic groups, which provides an efficient protocol to difunctionalize ketones, was reported.
Chiral N-heterocyclic carbene (NHC), a privileged ligand for transition metals, has had a profound impact on organometallic chemistry. The monodentate and bidentate chiral carbenes have been developed significantly, while the tridentate ones have been less exploited. Herein, we designed and [a] Y.
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