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Digitale Medien

Novel Solid-State Synthesis of Polyfunctionalized 3,9-Diazatetraasteranes (1998)

Hilgeroth, Andreas ; Baumeister, Ute ; Heinemann, Frank W.

Weinheim : Wiley-Blackwell

Liebigs Annalen 1998 (1998), S. 1213-1218

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Details

ISSN: 1434-193X

Schlagwort(e): Cycloadditions ; Diazatetraasteranes ; Crystal structure ; Solid-state chemistry ; Photochemistry ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Upon irradiation, crystalline 4-methoxyphenyl-1,4-dihy-dropyridines 1 undergo nearly quantitative [2+2]cyclo-addition to form, via the ring-open intermediates 2, the centrosymmetric, polyfunctionalized 3,9-diazatetraasteranes 3. The centrosymmetric character of 3 was confirmed by 1H NMR spectral data as well as by X-ray crystal structure analysis. The dimerization reactions prove to be topochemically controlled by the nearest distance between potentially reacting double bonds, as well as by the conformationally determined packing restraints. This latter factor is shown by the X-ray crystal structure analysis of one dimerizing and one photostable derivative of the monomers 1.

Materialart: Digitale Medien

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