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Beilstein J. Org. Chem. 2025, 21, 262–269, doi:10.3762/bjoc.21.18
Graphical Abstract
Scheme 1: Knoevenagel and Diels–Alder reactions in the multicomponent synthesis of substituted cyclohexadiene...
Figure 1: Equipment for carrying out reactions by the diffusion mixing method.
Scheme 2: Interaction of diketone 1 with formaldehyde under the diffusion mixing conditions.
Scheme 3: Products of three-component reactions of methylene derivatives, formaldehyde and various dienes.
Scheme 4: Proposed mechanism for the formation of compounds 8 and 9 in the presence of ʟ-proline.
Scheme 5: Interconversion of derivatives 8 and 9.
Scheme 6: Interaction of 4a/4b and 5a/5b mixtures with bromine.