## Abstract Starting with 5‐formyl‐6,7‐dimethyl‐5,6,7,8‐tetrahydropterine (II), a new synthesis of 5,6,7‐trimethyl‐5,6,7,8‐tetrahydropterine (III) is described. Thereby the chemical behaviour of the 5‐formyl group in II is investigated, in order to enable the unequivocal differentiation between for
Identification of 5,6,7,8-tetrahydropterin and 5,6,7,8-tetrahydrobiopterin in Drosophila melanogaster
✍ Scribed by Juan J. Guillamón; Juan Ferré
- Book ID
- 117058160
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 534 KB
- Volume
- 152
- Category
- Article
- ISSN
- 0006-291X
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**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
## Abstract The ^13^C‐NMR.‐spectra of 7,8‐dihydropterines and 5,6,7,8‐tetrahydropterines show a large difference in the chemical shifts of the 4a‐ and 8a‐sp^2^‐carbon atoms. From the CNDO calculations it is apparent that there is a considerable difference in electron density at C(4a) and C(8a) atom