Volume 60, Issue 16 pp. 8786-8791
Communication

Hydrogen-Bonding Assisted Catalytic Kinetic Resolution of Acyclic β-Hydroxy Amides

Arka Porey

Arka Porey

School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032 India

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Bhaskar Deb Mondal

Bhaskar Deb Mondal

School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032 India

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Dr. Joyram Guin

Corresponding Author

Dr. Joyram Guin

School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032 India

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First published: 24 December 2020
Citations: 13

Graphical Abstract

A method for catalytic kinetic resolution (KR) of acyclic α-substituted β-hydroxy amides was developed via enantioselective acylation of primary alcohol with an N-heterocyclic carbene. Enhanced selectivity was realized for the catalytic KR process using cyclic tertiary amine as a base additive. Diastereomeric transition state models are proposed to rationalize the origin of enantioselectivity.

Abstract

Enantioenriched acyclic α-substituted β-hydroxy amides are valuable compounds in chemical, material and medicinal sciences, but their enantioselective synthesis remains challenging. A catalytic kinetic resolution (KR) of such amides with selectivity factor(s) up to >200 is developed via enantioselective acylation of primary alcohol with N-heterocyclic carbene. An enhanced selectivity for the catalytic KR process is realized using cyclic tertiary amine as base additive. Diastereomeric transition state models for the process are proposed to rationalize the origin of enantioselectivity.

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