A General Synthesis of Sphinganines through Multicomponent Catalytic Asymmetric Aziridination

doi:10.1002/ejoc.201301766

Paper

A General Synthesis of Sphinganines through Multicomponent Catalytic Asymmetric Aziridination

Published Mar 1, 2014 · DOI · Munmun Mukherjee, Yubai Zhou, A. Gupta

European Journal of Organic Chemistry

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Abstract

A catalytic asymmetric synthesis of all four stereoisomers of sphinganine is described starting from hexadecanal. Utilizing either the (R) or (S) enantiomer of a BOROX catalyst, a multicomponent reaction of this aldehyde with an amine and ethyl diazoacetate gives rise to enantiomeric aziridine-2-carboxylates. Access to all diastereomers of sphinganine is realized upon ring opening of the enantiopure aziridine-2-carboxylate at the C-3 position by direct SN2 attack of an oxygen nucleophile, which occurs with inversion of configuration and by ring expansion of an N-acyl aziridine to an oxazolidinone and then hydrolysis. Overall, this process results in the formal ring opening of the aziridine with an oxygen nucleophile with retention of configuration.

Study Snapshot

This study presents a catalytic asymmetric synthesis of all four stereoisomers of sphinganine using hexadecanal, amine, and ethyl diazoacetate, resulting in the formal ring opening of aziridine with an oxygen nucleophile while maintaining

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

A General Synthesis of Sphinganines through Multicomponent Catalytic Asymmetric Aziridination

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