Diastereodivergent synthesis of novel dispiro(imidazothiazolotriazine-pyrrolidin-oxindoles) based on ortho- and meta-nitrobenzylidene derivatives of imidazothiazolotriazine Full article
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Tetrahedron
ISSN: 0040-4020 , E-ISSN: 1464-5416 |
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| Output data | Year: 2025, Volume: 184, Article number : 134782, Pages count : DOI: 10.1016/j.tet.2025.134782 | ||||
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Abstract:
Four series of dispiro-fused polyheterocyclic compounds containing spiro(pyrrolidine-2,3′-oxindole) and imidazothiazolotriazine moieties were prepared by [3 + 2] cycloaddition of azomethine ylide to ortho- and meta-nitrobenzylidene derivatives of imidazothiazolotriazine. It was shown that ylide cycloaddition occurs to both diastereotopic faces of the dipolarophiles to give the target compounds as two diastereomers. Skeletal rearrangement of the major dispiro(imidazo[4,5-e]thiazolo[3,2-b][1,2,4]triazine-6,3′-pyrrolidin-2′,3″-oxindoles) (anti-exo-diastereomers) gave isomeric dispiro(imidazo[4,5-e]thiazolo[2,3-c][1,2,4]triazine-7,3′-pyrrolidin-2′,3″-oxindoles) (angular syn-exo-diastereomers) that are inaccessible by the direct [3 + 2] cycloaddition reaction.
Cite:
Izmest'ev A.N.
, Isakov S.S.
, Strelenko Y.A.
, Kravchenko A.N.
, Gazieva G.A.
Diastereodivergent synthesis of novel dispiro(imidazothiazolotriazine-pyrrolidin-oxindoles) based on ortho- and meta-nitrobenzylidene derivatives of imidazothiazolotriazine
Tetrahedron. 2025. V.184. 134782 . DOI: 10.1016/j.tet.2025.134782 WOS Scopus OpenAlex
Diastereodivergent synthesis of novel dispiro(imidazothiazolotriazine-pyrrolidin-oxindoles) based on ortho- and meta-nitrobenzylidene derivatives of imidazothiazolotriazine
Tetrahedron. 2025. V.184. 134782 . DOI: 10.1016/j.tet.2025.134782 WOS Scopus OpenAlex
Identifiers:
| ≡ Web of science: | WOS:001518606900006 |
| ≡ Scopus: | 2-s2.0-105008019335 |
| ≡ OpenAlex: | W4411306643 |