Ligand-controlled divergent asymmetric C(sp<sup>3</sup>)-H and C(sp<sup>3</sup>)-O insertion via vinyl cations.
basic_science · Level V
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- Record sourced from PubMed, PMID 40316525.
- Also identified by DOI 10.1038/s41467-025-59328-7 and PMC identifier 12048635.
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Abstract
The insertion of either C-H bond or C-O bond via bond cleavage has proven to be a very attractive strategy for the construction of C-C and C-O bonds in organic synthesis. However, such divergent catalytic asymmetric reactions for the selective formation of C(sp<sup>3</sup>)-H insertion and formal C(sp<sup>3</sup>)-O insertion products from the same precursors are rarely explored. Herein, we report a ligand-controlled divergent asymmetric C(sp<sup>3</sup>)-H insertion and formal C(sp<sup>3</sup>)-O insertion reaction via vinyl cations by a non-diazo approach, leading to the practical and atom-economical assembly of a range of chiral spiro and fused polycyclic pyrroles in generally moderate to excellent yields with generally excellent chemo- and enantioselectivities. Importantly, this protocol not only represents a rare example of successful ligand-controlled asymmetric divergent insertion reaction, but also constitutes an enantioselective 1,6-C-H insertion and an asymmetric carbenoid insertion into acetals via a non-diazo approach.