[HTML][HTML] Stereodivergent 1, 3-difunctionalization of alkenes by charge relocation

BR Brutiu, G Iannelli, M Riomet, D Kaiser, N Maulide - Nature, 2024 - nature.com
BR Brutiu, G Iannelli, M Riomet, D Kaiser, N Maulide
Nature, 2024nature.com
Alkenes are indispensable feedstocks in chemistry. Functionalization at both carbons of the
alkene—1, 2-difunctionalization—is part of chemistry curricula worldwide 1. Although
difunctionalization at distal positions has been reported 2, 3, 4, it typically relies on designer
substrates featuring directing groups and/or stabilizing features, all of which determine the
ultimate site of bond formation 5, 6, 7. Here we introduce a method for the direct 1, 3-
difunctionalization of alkenes, based on a concept termed 'charge relocation', which enables …
Abstract
Alkenes are indispensable feedstocks in chemistry. Functionalization at both carbons of the alkene—1, 2-difunctionalization—is part of chemistry curricula worldwide 1. Although difunctionalization at distal positions has been reported 2, 3, 4, it typically relies on designer substrates featuring directing groups and/or stabilizing features, all of which determine the ultimate site of bond formation 5, 6, 7. Here we introduce a method for the direct 1, 3-difunctionalization of alkenes, based on a concept termed ‘charge relocation’, which enables stereodivergent access to 1, 3-difunctionalized products of either syn-or anti-configuration from unactivated alkenes, without the need for directing groups or stabilizing features. The usefulness of the approach is demonstrated in the synthesis of the pulmonary toxin 4-ipomeanol and its derivatives.
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