Griffiths OM, Ley SV. Multicomponent Direct Assembly of
N-Heterospirocycles Facilitated by Visible-Light-Driven Photocatalysis.
J Org Chem 2022;
87:13204-13223. [PMID:
36103403 PMCID:
PMC9552240 DOI:
10.1021/acs.joc.2c01684]
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Abstract
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N-heterospirocycles are interesting
structural
units found in both natural products and medicinal compounds but have
relatively few reliable methods for their synthesis. Here, we enlist
the photocatalytic generation of N-centered radicals
to construct β-spirocyclic pyrrolidines from N-allylsulfonamides and alkenes. A variety of β-spirocyclic
pyrrolidines have been constructed, including drug derivatives, in
moderate to very good yields. Further derivatization of the products
has also been demonstrated as has a viable scale-up procedure, making
use of flow chemistry techniques.
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