Copper catalyzed late-stage C(sp<sup>3</sup>)-H functionalization of nitrogen heterocycles.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34267229.
- Also identified by DOI 10.1038/s41467-021-24671-y and PMC identifier 8282657.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Nitrogen heterocycle represents a ubiquitous skeleton in natural products and drugs. Late-stage C(sp<sup>3</sup>)-H bond functionalization of N-heterocycles with broad substrate scope remains a challenge and of particular significance to modern chemical synthesis and pharmaceutical chemistry. Here, we demonstrate copper-catalysed late-stage C(sp<sup>3</sup>)-H functionalizaion of N-heterocycles using commercially available catalysts under mild reaction conditions. We have investigated 8 types of N-heterocycles which are usually found as medicinally important skeletons. The scope and utility of this approach are demonstrated by late-stage C(sp<sup>3</sup>)-H modification of these heterocycles including a number of pharmaceuticals with a broad range of nucleophiles, e.g. methylation, arylation, azidination, mono-deuteration and glycoconjugation etc. Preliminary mechanistic studies reveal that the reaction undergoes a C-H fluorination process which is followed by a nucleophilic substitution.