𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Über Pterinchemie. 56. Mitteilung. Die Kristallstruktur von Xanthopterin-hydrochlorid

✍ Scribed by Jost H. Bieri; Willi-Peter Hummel; Max Viscontini

Publisher
John Wiley and Sons
Year
1976
Tongue
German
Weight
351 KB
Volume
59
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

The crystal structure of xanthopterine‐hydrochloride.

The crystal structure of the title compound, a pterine, has been determined by X‐ray analysis (direct methods) and refined with 1332 structure amplitudes to R = 0.027. The crystal system is monoclinic, space group __P__2~1/c~, with unit cell dimensions a = 7.942, b = 8.417, c = 12.076 Å, β = 93.77°. The molecule is protonated at the N(1)‐position. The angle between the planes of the pyrimidine and pyrazine rings is 2.02°.

📜 SIMILAR VOLUMES

Über Pterinchemie. 64. Mitteilung. Die K
Über Pterinchemie. 64. Mitteilung. Die Kristallstruktur von 6-Methyl-7,8-dihydropterin-monohydrochlorid-monohydrat
✍ Jost H. Bieri 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 German ⚖ 313 KB 👁 1 views

**The crystal structure of 6‐methyl‐7,8‐dihydropterine‐monohydrochloride‐monohydrate** The crystal structure of the title compound has been determined by X‐ray analysis (direct methods) and refined with 990 structure amplitudes to R = 0.025. The crystal system is triclinic, space group P1, with uni

Über Pterinchemie. Mitteilung. Die Krist
Über Pterinchemie. Mitteilung. Die Kristallstruktur von 5,6,7-Trimethyl-5,6,7,8-tetrahydropterindihydrochlorid-monohydrat
✍ Jost H. Bieri; Max Viscontini 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 German ⚖ 310 KB 👁 1 views

**The crystal structure of 5,6,7‐trimethyl‐5,6,7,8‐tetrahydropterine‐dihydrochloride‐monohydrate** The crystal structure of the title compound has been determined by X‐ray analysis (direct methods) and refined with 947 structure amplitudes to R = 0.026. The crystal system is orthorhombic, space gro

Über Pterinchemie. 61. Mitteilung. Die K
Über Pterinchemie. 61. Mitteilung. Die Kristallstruktur von 5-Formyl-6,7-dimethyl-5,6,7,8-tetrahydropterin
✍ Jost H. Bieri; Max Viscontini 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 German ⚖ 359 KB 👁 1 views

**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

Über Pterinchemie. 43. Mitteilung [1]. S
Über Pterinchemie. 43. Mitteilung [1]. Synthese von D-Neopterin-3′-phosphat und D-Neopterin-2′, 3′-cyclophosphat. Betrachtungen über die Biopterin-Biogenese
✍ Max Viscontini; Yoshiteru Furuta 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 351 KB 👁 1 views

## Abstract Die Synthese des D‐Neopterin‐3′‐phosphates (II) und des entsprechenden Cyclophosphates III wird beschrieben. Bei der Behandlung von D‐Neopterin mit Polyphosphorsäure in der Wärme tritt Cyclisierung der Trihydroxypropyl‐Kette mit dem N(5)‐Atom unter Verlust von zwei Molekeln Wasser ein.

Über Pterinchemie 80. Mitteilung Die Her
Über Pterinchemie 80. Mitteilung Die Herstellung von (6RS)Tetra- und (6RS)Pentaacetyl-5,6,7,8-tetrahydro-L-bioplerinen
✍ Subhendu Narayaa Ganguly; Max Viscontini 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 German ⚖ 191 KB 👁 1 views

**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_