75771-90-3Relevant academic research and scientific papers
The Bacterial Pigment from Pseudomonas Lemonnieri. Part 1. Structure of a Degradation Product, 3-n-Octanamidopyridine-2,5,6-trione, by X-Ray Crystallography
Ferguson, George,Pollard, David R.,Robertson, J. Monteath,Doherty, George O.P.,Haynes, Norman B.,at al.
, p. 1782 - 1787 (2007/10/02)
Degradation with chromic acid of the blue pigment, lemonnierin, C26H37N5O6, from Pseudomonas lemonnieri, gives 3-n-octanamidopyridine-2,5,6-trione (1; R=H), the structure of which has been defined by X-ray analysis of the N-p-iodobenzyl derivative (1; R=p-iodobenzyl).Crystals are orthorhombic, space group Pbca with eight molecules of C20H23IN2O4 in a unit cell of dimensions a=8.68(3), b=38.71(5), c=12.53(3) Angstroem.Intensity data were obtained by visual estimation of Weissenberg films.The structure was solved by the heavy-atom method and refined by block-diagonal least-squares calculations: R=0.122 for 1 004 measured reflections.Degradation of (1; R=H) with alkali gives successively (+/-)-n-octanamidosuccinimide (2) and (+/-)-n-octanoylasparagine (4), which have been synthesised.The formal synthesis of (1; R=H) is recorded.
