2 article(s) from Krasavin, Mikhail
- Letter
- Published 07 May 2019
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Graphical Abstract
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Figure 1: Examples of imidazole (1 and 2) and oxazole (3) syntheses from propargylamides previously reported ...
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Figure 2: Substrate scope for the three-component synthesis of 5.
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Figure 3: Plausible mechanism for the formation of 5.
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- Full Research Paper
- Published 18 Jul 2017
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Graphical Abstract
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Figure 1: The Castagnoli–Cushman reaction (CCR).
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Figure 2: Assembly of hexahydropyrrolo[1,2-b]isoquinoline core via the CCR and its occurrence in natural and ...
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Figure 3: Indolenine substrates 9a–t investigated in this work. aPrepared for the first time (the rest are kn...
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Figure 4: Anti- and syn-diastereomers of 10 and 10'.
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Figure 5: Single-crystal X-ray structure of compound 10l.
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Scheme 1: Formation of unwanted products 11 and 12 in lieu of the CCR with 9p–t.
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Figure 6: Typical J(H11-H11a)-values and corresponding dihedral angles for syn- and anti-diastereomers of com...
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Figure 7: The difference in the 13C NMR chemical shifts of the angular methyl group between syn- and anti-dia...
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Figure 8: Criteria for stereochemistry assignment of anti-10o.
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Scheme 2: Syn/anti isomerization of compound 10e.
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Scheme 3: Alternative mechanistic pathways for the CCR.
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Scheme 4: Formation and fate of Mannich adduct 13e.
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Scheme 5: Mechanistic rationale for the 13e→ syn/anti-10e conversion.
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Scheme 6: Decarboxylation of anti/syn-10h.
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