| Literature DB >> 28636185 |
Joel M Smith1, Tian Qin1, Rohan R Merchant1, Jacob T Edwards1, Lara R Malins1, Zhiqing Liu2, Guanda Che2, Zichao Shen2, Scott A Shaw3, Martin D Eastgate4, Phil S Baran1.
Abstract
The development of a new decarboxylative cross-coupling method that affords terminal and substituted alkynes from various carboxylic acids is described using both nickel- and iron-based catalysts. The use of N-hydroxytetrachlorophthalimide (TCNHPI) esters is crucial to the success of the transformation, and the reaction is amenable to in situ carboxylic acid activation. Additionally, an inexpensive, commercially available alkyne source is employed in this formal homologation process that serves as a surrogate for other well-established alkyne syntheses. The reaction is operationally simple and broad in scope while providing succinct and scalable avenues to previously reported synthetic intermediates.Entities:
Keywords: alkynylation; homologation; iron catalysis; nickel catalysis; redox-active esters
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Year: 2017 PMID: 28636185 PMCID: PMC5792189 DOI: 10.1002/anie.201705107
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336