175481-37-5Relevant articles and documents
Novel preparation method of lacosamide
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, (2021/07/09)
The invention relates to a preparation method of high-purity lacosamide, and belongs to the technical field of organic synthesis. The technical problem to be solved by the invention is to provide a preparation method of lacosamide with mild reaction conditions and high optical purity. The preparation method comprises the following steps: carrying out condensation reaction on a carboxylic acid compound with a protecting group and benzylamine to generate an amide compound, carrying out deprotection under the condition of phosphoric acid, and introducing acetyl to prepare the lacosamide. The invention provides a novel industrial synthesis selection mode, the synthesis mode has the characteristics of simple process, mild reaction conditions, environmental friendliness and the like, can be used for preparing an optical high-purity target compound, and is beneficial to industrial production.
Direct, Enantioselective, and Nickel(II) Catalyzed Reactions of N-Azidoacetyl Thioimides with Trimethyl Orthoformate: A New Combined Methodology for the Rapid Synthesis of Lacosamide and Derivatives
Teloxa, Saul F.,Kennington, Stuart C. D.,Camats, Marc,Romea, Pedro,Urpí, Fèlix,Aullón, Gabriel,Font-Bardia, Mercè
, p. 11540 - 11548 (2020/08/10)
A direct and highly enantioselective reaction of N-azidoacetyl-1,3-thiazolidine-2-thione with trimethyl orthoformate catalyzed by Tol-BINAPNiCl2 in the presence of TESOTf and 2,6-lutidine is reported. The heterocyclic scaffold can be easily removed by addition of a wide array of amines to give the corresponding enantiomerically pure 2-azido-3,3-dimethoxypropanamides in high yields. Appropriate manipulation of the N-benzyl amide derivative provides an efficient access to the antiepileptic agent lacosamide through a new enantioselective C?C bond-forming process. DFT computational studies uncover clues for the understanding of the remarkable stereocontrol of the addition of a nickel(II) enolate to a putative oxocarbenium intermediate from trimethyl orthoformate.
Enantioselective three-component Ugi reaction catalyzed by chiral phosphoric acid
Zhang, Jian,Wang, Yi-Yan,Sun, He,Li, Shao-Yu,Xiang, Shao-Hua,Tan, Bin
, p. 47 - 54 (2019/11/11)
A catalytic enantioselective three-component Ugi reaction was developed. SPINOL-derived phosphoric acid with bulky 2,4,6-tricyclohexylphenyl groups at the 6,6′ positions was found to be the best catalyst to afford α-amino amide derivatives in good to excellent yields (62% to 99%) and enantiocontrol (81% to >99% enantiomeric excess). This asymmetric reaction was applicable well to an array of aliphatic aldehydes. The gram-scale synthesis, modification of dapsone, and enantioselective synthesis of (R)-Lacosamide underline the general utility of this methodology Influence of dihedral angles and substituents of the chiral phosphoric acids on the enantioselectivity was also discussed in this article.