Jenkins T, Poole DL, Donohoe TJ. Oxidative Rearomatization of Tetrahydroisoquinolines Promoted by Pyridine-
N-oxide.
Org Lett 2024;
26:8377-8381. [PMID:
39312716 PMCID:
PMC11459517 DOI:
10.1021/acs.orglett.4c03186]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2024] [Revised: 09/13/2024] [Accepted: 09/20/2024] [Indexed: 09/25/2024]
Abstract
Isoquinolines are ubiquitous arenes found in many biologically useful molecules. While direct substitution at the heterocyclic ring is uncommon, reductive functionalization to form tetrahydroisoquinolines (THIQs) is straightforward. Herein, we describe a facile method for producing C4-functionalized isoquinolines from a readily available parent THIQ. This high-temperature transformation utilizes pyridine-N-oxide as an oxidant generating only volatile side products and is functional-group-tolerant.
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