## Gedenken (1
Über Pterinchemie. 70. Mitteilung. Konformationsanalyse von 5, 10-Methenyl-(6 RS)-5,6,7,8-tetrahydro-L-folsäure,
✍ Scribed by Esam Khalifa; Jost H. Bieri; Max Viscontini
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- German
- Weight
- 256 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
**Preparation of (6__RS__)Tetra‐ and (6__RS__)‐Pentaacetyl‐5,6,7,8‐tetrahydro‐L‐biopterines** Boiling of (6__RS__) l′‐__O__,2′‐__O__,2‐N‐triacetyl‐5,6,7,8‐tetrahydro‐L‐biopterine in acetic anhydride as described in [2], leads to a mixture of the diastereoisomeric (6__R__)‐ and (65)‐l′‐__O__,2′‐__O_
**Conformational Analysis of Acylated 5,6,7,8‐Tetrahydropterines** The conformation of __N__(5)‐acetates, and of __N__(5)‐ and __N__(8)‐trifluoroacetates, respectively, of 6‐methyl‐ and __cis__‐6, 7‐dimethyl‐tetrahydropterines is studied by ^1^H‐NMR. spectroscopy. It is shown that the methyl group
**^13^C‐ and ^15^N‐NMR.‐Spectroscopic Studies on (__6RS__)‐5, 10‐Methylene‐5, 6, 7, 8‐tetrahydro‐L‐folic Acid; Unequivocal Proof of thier Structure** The existence of a 5, 10‐methylene bridge in the title compound has been established with the help of ^15^N‐NMR, and ^13^C‐NMR. spectroscopy. The sim
**Preparation and characterisation of pure 5,6,7,8‐tetrahydro‐L‐neopterine und 5,6,7,8‐tetrahydro‐D‐monapterine**. The synthesis of these two compounds, III and IV, is described, and their structures ascertained by means of ^1^H‐NMR., ^13^C‐NMR. and FD. spectroscopy. In particular the possibility o
**Separation of the Diastereomers (6__R__) and (6__S__)‐5,6,7,8‐Tetrahydro‐L‐neopterin** The mixture of the diastereomers of the pentaacetylderivative IV of (6__RS__)‐5,6,7,8‐tetrahydro‐L‐neopterins could be separated by fractional crystallisation in methanol into the diastereomers IV A and IV B. H