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Reassignments and Corroborations of Oxo‐Bridged Natural Products Directed by OSE and DU8+ NMR Computation
Author(s) -
Kutateladze Andrei G.,
Krenske Elizabeth H.,
Williams Craig M.
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201902777
Subject(s) - alkene , olefin fiber , chemistry , natural (archaeology) , chemical shift , carbon 13 nmr , computational chemistry , combinatorial chemistry , biochemical engineering , organic chemistry , catalysis , engineering , biology , paleontology
Structural misassignments of natural products are prevalent in the literature. Developing methods and theoretical concepts to assist those undertaking structural elucidation is therefore of paramount importance, such that biologists and synthetic chemists avoid pursuing phantom chemical entities. Herein described is a strategy for predicting the isolabilities of oxygen‐substituted bridgehead natural products based on calculations of olefin strain energies, NMR chemical shifts and coupling constants (DU8+). This approach provides corroborating evidence for the structures of certain bridgehead alkene natural products while leading to the reassignment of several other structures.