𝔖 Bobbio Scriptorium
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The structure of covalent hydrates of alloxazines. A reinvestigation

✍ Scribed by Jacek Koziol; Bozena Tyrakowska; Franz Müller

Publisher
John Wiley and Sons
Year
1981
Tongue
German
Weight
315 KB
Volume
64
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

It is shown by ^13^C‐NMR. and synthesis of 6,7‐dimethyl‐3‐ethoxycarbonylamino‐quinoxaline‐2‐carboxamide (5) and methyl 6,7‐dimethyl‐3‐(N′‐methylureido)‐quinoxaline‐2‐carboxylate (6) that hydrolysis of lumichrome (1, R = H) must yield 6,7‐dimethyl‐3‐ureidoquinoxaline‐2‐carboxylic acid (2, R = H) and not 6,7‐dimethyl‐2‐oxo‐1,2,9,9a‐tetrahydrooxazolo[4,5‐b]quinoxaline‐9a‐carboxamide (2a, R = H), as previously proposed.

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