A copper/O<sub>2</sub>-mediated direct sp<sup>3</sup> C–H/N–H cross-dehydrogen coupling reaction of acylated amines and <i>N</i>-aryl glycine esters
作者:Bin Sun、Yao Wang、Deyu Li、Can Jin、Weike Su
DOI:10.1039/c8ob00176f
日期:——
e coupling reaction between N-aryl glycine esters and acylated amines has been developed. The reaction proceeded effectively under an oxygen atmosphere without the use of peroxide agents. This simple protocol allows for the preparation of a series of newcompounds in a moderate to excellent yield via the CDC reaction of a wide range of N-aryl glycinederivatives with acylated amines, which are of great
(EN) 2(R or S)-[2R-(S-Hydroxy-hydroxycarbamoyl-methyl)-4-methyl-pentanoylamine]-2-phenyl-ethanoic acid cyclopentyl ester; 2(R or S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-enoylamino)-2-phenylethanoic acid isopropyl ester; 2(R or S)-[2R-(S-Hydroxycarbamoyl-methoxy-methyl)-4-methyl-pentanoylamino]-3-phenylethanoic acid cyclopentyl ester; 2(R or S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-enoylamino)-2-(4-methoxyphenyl)ethanoic acid cyclopentyl ester; 2(R or S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-enoylamino)-2-(thien-2-yl)ethanoic acid cyclopentyl ester; and 2(R or S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-enoylamino)-2-(thien-3-yl)ethanoic acid cyclopentyl ester are cytostatic agents.(FR) L'ester cyclopentylique d'acide 2(R ou S)-[2R-(S-Hydroxy-hydroxycarbamoyl-méthyl)-4-méthyl-pentanoylamine]-2-phényl-éthanoïque; l'ester isopropylique d'acide 2(R ou S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-énoylamino)-2-phényléthanoïque; l'ester cyclopentylique d'acide 2(R ou S)-[2R-(S-Hydroxycarbamoyl-méthoxy-méthyl)-4-méthyl-pentanoylamino]-3-phényléthanoïque; l'ester cyclopentylique d'acide 2(R ou S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-énoylamino)-2-(4-méthoxyphényl)éthanoïque; l'ester cyclopentlylique d'acide 2(R ou S)-(3S-Hydroxycarbamoyl-2R-isobutyl-hex-5-énoylamino)-2-(thien-2-yl)éthanoïque; et l'ester cyclopentylique d'acide 2(R ou S)-(3S-hydroxycarbamoyl-2R-isobutyl-hex-5-énoylamino)-2-(thien-3-yl)éthanoïque sont des cytostatiques.
The invention relates to a sulphonic acid salt of an amino acid alkyl ester The invention further relates to a process for the esterification of an organic acid into the corresponding organic acid ester comprising bringing the organic acid into contact with a strong acid and a solution comprising dialkylcarbonate in a reaction mixture. The invention further relates to the use of a sulphonic acid salt of an amino acid alkyl ester in the synthesis of a β-lactam antibiotic.
Compounds of general formula (I)
wherein R4 is an ester or thioester group and R, R1, R2, and R3 are as specified in the description, inhibit monocyte and/or macrophage and/or lymphocyte activation and lymphocyte proliferation.