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Über Pterinchemie. 61. Mitteilung. Die Kristallstruktur von 5-Formyl-6,7-dimethyl-5,6,7,8-tetrahydropterin

✍ Scribed by Jost H. Bieri; Max Viscontini

Publisher
John Wiley and Sons
Year
1977
Tongue
German
Weight
359 KB
Volume
60
Category
Article
ISSN
0018-019X

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✦ Synopsis

The crystal structure of 5‐formyl‐6,7‐dimethyl‐5,6,7,8‐tetrahydropterine

The crystal structure of the title compound, a tetrahydropterine, has been determined by X‐ray analysis (direct method) and refined with 1579 structure amplitudes to R = 0.054. The crystal system is triclinic, space group P1, with unit cell dimensions a = 7.171, b = 7.255, c = 12.369 Å, α = 100.64, β = 93.32, γ = 98.27°. The tetrahydropyrazine ring exists in a distinctly flattened conformation. The C(13)‐ and C(14)‐CH~3~‐groups possess a cis‐configuration with axial position for C(13)‐CH~3~ and equatorial for C(14)‐CH~3~. The carbonyl‐group of the N‐formyl function has an (E)‐configuration.

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