Dataset Information

Unequivocal identification of two-bond heteronuclear correlations in natural products at nanomole scale by i-HMBC.

ABSTRACT: HMBC is an essential NMR experiment for determining multiple bond heteronuclear correlations in small to medium-sized organic molecules, including natural products, yet its major limitation is the inability to differentiate two-bond from longer-range correlations. There have been several attempts to address this issue, but all reported approaches suffer various drawbacks, such as restricted utility and poor sensitivity. Here we present a sensitive and universal methodology to identify two-bond HMBC correlations using isotope shifts, referred to as i-HMBC (isotope shift detection HMBC). Experimental utility was demonstrated at the sub-milligram / nanomole scale with only a few hours of acquisition time required for structure elucidation of several complex proton-deficient natural products, which could not be fully elucidated by conventional 2D NMR experiments. Because i-HMBC overcomes the key limitation of HMBC without significant reduction in sensitivity or performance, i-HMBC can be used as a complement to HMBC when unambiguous identifications of two-bond correlations are needed.

SUBMITTER: Wang Y

PROVIDER: S-EPMC10070429 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature

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Unequivocal identification of two-bond heteronuclear correlations in natural products at nanomole scale by i-HMBC.

Wang Yunyi Y Fan Aili A Cohen Ryan D RD Dal Poggetto Guilherme G Huang Zheng Z Yang Haifeng H Martin Gary E GE Sherer Edward C EC Reibarkh Mikhail M Wang Xiao X

Nature communications 20230403 1

HMBC is an essential NMR experiment for determining multiple bond heteronuclear correlations in small to medium-sized organic molecules, including natural products, yet its major limitation is the inability to differentiate two-bond from longer-range correlations. There have been several attempts to address this issue, but all reported approaches suffer various drawbacks, such as restricted utility and poor sensitivity. Here we present a sensitive and universal methodology to identify two-bond H ...[more]

PMID: 37012241

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Dataset Information

Unequivocal identification of two-bond heteronuclear correlations in natural products at nanomole scale by i-HMBC.

Publications

Unequivocal identification of two-bond heteronuclear correlations in natural products at nanomole scale by i-HMBC.

Similar Datasets

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