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Catalyst free one pot three components synthesis of 2-iminothiazoles from nitroepoxides and thiourea.

ABSTRACT: Nitroepoxides were introduced as efficient substrates for the one-pot three-component synthesis of 2-iminothiazoles under catalyst-free conditions. Reaction of amines, isothiocyanates, and nitroepoxides in THF at 10-15 °C afforded corresponding 2-iminothiazoles in high to excellent yields. The reaction proceeds via the in situ formation of thiourea from an amine and an isothiocyanate, followed by nitroepoxide ring opening with the sulfur of thiourea, cyclization reaction, and dehydration cascade. The structures of products were confirmed by IR, NMR, HRMS analyses and X-ray crystallography.

SUBMITTER: Badali E

PROVIDER: S-EPMC9947138 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Catalyst free one pot three components synthesis of 2-iminothiazoles from nitroepoxides and thiourea.

Badali Elham E Ziyaei Halimehjani Azim A Habibi Azizollah A

Scientific reports 20230222 1

Nitroepoxides were introduced as efficient substrates for the one-pot three-component synthesis of 2-iminothiazoles under catalyst-free conditions. Reaction of amines, isothiocyanates, and nitroepoxides in THF at 10-15 °C afforded corresponding 2-iminothiazoles in high to excellent yields. The reaction proceeds via the in situ formation of thiourea from an amine and an isothiocyanate, followed by nitroepoxide ring opening with the sulfur of thiourea, cyclization reaction, and dehydration cascade ...[more]

PMID: 36813887

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