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Improved Synthesis of a Cyclic Glutamine Analogue Used in Antiviral Agents Targeting 3C and 3CL Proteases Including SARS-CoV-2 M^pro.

ABSTRACT: An intermediate in the synthesis of numerous antiviral protease inhibitors is the glutamine analogue, (3S)-pyrrolid-2-one-3-yl-l-alanine. Preparations of compounds based on this pharmacophore are hindered by the lack of a reliably high yielding synthesis of protected forms of this amino acid. We describe an improved scalable route with readily available reagents and facile purification. This methodology employs γ-allylation of dimethyl N-BocGlu, further Boc N-protection, OsO₄-periodate oxidation, O-Me oxime formation, and RaNi-catalyzed hydrogenolysis with concomitant cyclization under basic conditions.

SUBMITTER: Vuong W

PROVIDER: S-EPMC8425337 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature

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Improved Synthesis of a Cyclic Glutamine Analogue Used in Antiviral Agents Targeting 3C and 3CL Proteases Including SARS-CoV-2 Mpro.

Vuong Wayne W Vederas John C JC

The Journal of organic chemistry 20210828 18

An intermediate in the synthesis of numerous antiviral protease inhibitors is the glutamine analogue, (3S)-pyrrolid-2-one-3-yl-l-alanine. Preparations of compounds based on this pharmacophore are hindered by the lack of a reliably high yielding synthesis of protected forms of this amino acid. We describe an improved scalable route with readily available reagents and facile purification. This methodology employs γ-allylation of dimethyl N-BocGlu, further Boc N-protection, OsO4< ...[more]

PMID: 34459196

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