Journal
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2021, Issue 22, Pages 3214-3222Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.202100258
Keywords
Brown asymmetric allylation; Crotylation; Natural products
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Asymmetric allylation is an important reaction in natural product synthesis, allowing for the preparation of versatile chiral building blocks. Brown allylation has been successfully applied in the synthesis of various natural products, including macrolides and alkaloids.
Asymmetric allylation represents an important reaction applied in the natural product synthesis. The stereoselective introduction of an allyl group allows to obtain versatile chiral building blocks, which may further undergo various transformations due to the presence of the carbon-carbon double bond. In this review, we address the Brown allylation, which involves the conversion of aldehydes into homoallylic alcohols using B-allyldiisopinocampheylborane as a chiral reagent. We provide a comprehensive overview of the reaction and highlight its application in the synthesis of natural products, while assessing its performance in comparison to other approaches. The total of 17 syntheses have been described, including the synthesis of biologically active macrolides disciformycin B, biselyngbyolide B, peloruside A, and gliomasolide A, bis-piperidine alkaloid (-)-anaferine and dysoxylactam A.
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