Feng, Kaibo; Quevedo, Raundi E.; Kohrt, Jeffrey T.; Oderinde, Martins S.; Reilly, Usa; White, M. Christina published an article about the compound: 1-(4-Chlorophenyl)pyrrolidin-2-one( cas:7661-33-8,SMILESS:O=C1N(C2=CC=C(Cl)C=C2)CCC1 ).Electric Literature of C10H10ClNO. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:7661-33-8) through the article.
Frequently referred to as the ‘magic Me effect’, the installation of Me groups-especially adjacent (α) to heteroatoms-has been shown to dramatically increase the potency of biol. active mols.1-3. However, existing methylation methods show limited scope and have not been demonstrated in complex settings1. Here, we report a regioselective and chemoselective oxidative C(sp3)-H methylation method that is compatible with late-stage functionalization of drug scaffolds and natural products. This combines a highly site-selective and chemoselective C-H hydroxylation with a mild, functional-group-tolerant methylation. Using a small-mol. manganese catalyst, Mn(CF3PDP), at low loading (at a substrate/catalyst ratio of 200) affords targeted C-H hydroxylation on heterocyclic cores, while preserving electron-neutral and electron-rich aryls. Fluorine- or Lewis-acid-assisted formation of reactive iminium or oxonium intermediates enables the use of a mildly nucleophilic organoaluminum methylating reagent that preserves other electrophilic functionalities on the substrate. We show this late-stage C(sp3)-H methylation on 41 substrates housing 16 different medicinally important cores that include electron-rich aryls, heterocycles, carbonyls and amines. Eighteen pharmacol. relevant mols. with competing sites, including drugs (for example, tedizolid) and natural products, are methylated site-selectively at the most electron rich, least sterically hindered position. We demonstrate the syntheses of two magic Me substrates, an inverse agonist for the nuclear receptor RORc and an antagonist of the sphingosine-1-phosphate receptor-1, via late-stage methylation from the drug or its advanced precursor. We also show a remote methylation of the B-ring carbocycle of an abiraterone analog. The ability to methylate such complex mols. at late stages will reduce synthetic effort and thereby expedite broader exploration of the magic Me effect in pursuit of new small-mol. therapeutics and chem. probes.
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