Abstract
Organocatalytic asymmetric cycloaddition reactions are the foundation for the construction
of important cyclic molecules in synthetic chemistry and biochemistry. As a result,
organic catalysts, in particular chiral phosphoric acid, entice researchers from all
over the world to design and develop asymmetric cycloaddition reactions. In this Account,
we discuss CPA-catalyzed [3+2] and [4+2] cycloaddition of alkenes and some further
transformations from the cycloadducts, as well as several mechanisms related to these
cycloadditions. All kinds of enantioenriched carbocycles and heterocycles with stereogenic
centers could be synthesized efficiently. Recent advances in CPA-catalyzed cycloaddition
of alkynes to generate axially chiral compounds are also discussed.
1 Introduction
2 CPA-Catalyzed [3+2] Cycloaddition of Alkenes
3 CPA-Catalyzed [4+2] Cycloaddition of Alkenes
4 CPA-Catalyzed Cycloaddition of Alkynes
5 Conclusions
Key words
chiral phosphoric acid - organocatalysis - cycloaddition - alkenes - alkynes