This Review summarizes the advances in the construction of all-carbon quaternary stereocenters via catalytic enantioselective desymmetrization of prochiral and meso-compounds, highlights the power and potential of this strategy in the total synthesis of natural products and biologically active compounds, and outlines the synthetic opportunities still available.
The catalytic enantioselective assembly
of spirocyclic molecules
featuring a spiro quaternary carbon stereocenter is currently of great
interest because such privileged 3D structures are widely present
in natural products that exhibit a broad spectrum of biological and
pharmacological activities. This review summarizes the advances based
on six major synthetic strategies and showcases the reaction mechanisms
in detail. The advantages and limitations of each synthetic strategy
are presented, and the remaining synthetic opportunities are outlined.
A highly enantioselective Strecker reaction of difluoromethyl and trifluoromethyl ketoimines was developed. Remarkable fluorine effect on the reactivity and selectivity is observed and discussed.
Sulfur-containing
tetrasubstituted carbon stereocenters are widely
present in natural products, drugs, and biologically active compounds.
Catalytic enantioselective construction of such fully substituted
carbon stereocenters is a current research interest, with four major
synthetic strategies being developed. This review summarizes the advances
in this field, discusses in detail the advantages and limitation of
each synthetic strategy, and outlines the synthetic opportunities
still open for development.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.