73194-08-8Relevant academic research and scientific papers
Convenient approach for the synthesis of ONO-LB-457, a potent leukotriene B4 receptor antagonist
Hamri, Salha,Jouha, Jabrane,Oumessaoud, Asmaa,Pujol,Khouili, Mostafa,Guillaumet, Gérald
, (2021)
This study reports a new approach for the synthesis of 5-[2-(2-carboxyethyl)-3-[6-(4-methoxyphenyl)-(5E)-hexen-1-yloxy]phenoxy]pentanoic acid V (ONO-LB-457), previously described by Konno and col. and which is considered a highly potent and orally active
α-Oxo-Ketenimines from Isocyanides and α-Haloketones: Synthesis and Divergent Reactivity
Mamboury, Mathias,Wang, Qian,Zhu, Jieping
supporting information, p. 12744 - 12748 (2017/09/25)
The palladium-catalyzed reaction of α-haloketones with isocyanides afforded α-oxo-ketenimines through β-hydride elimination of the β-oxo-imidoyl palladium intermediates. Reaction of these relatively stable α-oxo-ketenimines with nucleophiles such as hydrazines, hydrazoic acid, amines, and Grignard reagent afforded pyrazoles, tetrazole, β-keto amidines, and enaminone, respectively, with high chemoselectivity. Whereas amines attack exclusively on the ketenimine functions, the formal [3+2] cycloaddition between N-monosubstituted hydrazines and α-oxo-ketenimines was initiated by nucleophilic addition to the carbonyl group.
An efficient method for the synthesis of a novel leukotriene B4 receptor antagonist, ONO-4057, via Michael reaction of dihydroresorcinol
Konno, Mitoshi,Nakae, Takahiko,Sakuyama, Shigeru,Imaki, Katsuhiro,Nakai, Hisao,Hamanaka, Nobuyuki
, p. 1472 - 1474 (2007/10/03)
A practical method for the synthesis of ONO-4057, a highly potent and orally active leukotriene B4 (LTB4) receptor antagonist, was developed. This method includes improved synthesis of a key intermediate, 1,3-dioxo-2-(2-ethoxycarbony lethyl)cyclohexane (6).
