Heteroatom activated β-lactam antibiotics: Synthesis of biologically active substituted N-oxy-3-amino-2-azetidinones (oxamazins)
作者:Steven R. Woulfe、Marvin J. Miller
DOI:10.1016/s0040-4039(01)81367-8
日期:1984.1
Representatives of a new class of oxygen activated β-lactams (oxamazins) have been synthesized from N-hydroxy-3-amino-2-azetidinones. The oxamazins show significant activity predominantly against Gram negative bacteria.
Synthesis and biological activity of substituted [[3(S)-(acylamino)-2-oxo-1-azetidinyl]oxy]acetic acids. A new class of heteroatom-activated .beta.-lactam antibiotics
作者:Steven R. Woulfe、Marvin J. Miller
DOI:10.1021/jm00148a013
日期:1985.10
dimethyl sulfoxide. The Cbz group was replaced with the 2-(2-amino-4-thiazolyl)-2(Z)-(methoxyimino)acetamido side chain by catalytic hydrogenation followed by treatment with 21. Removal of the 2-(trimethylsilyl)ethyl ester with fluoride ion provided derivativessuitable for antimicrobial evaluation. In vitro tests showed that the title compounds possess significant activity predominantly against Gram-negative
描述了取代的[[3(S)-(酰基氨基)-2-氧代-1-氮杂环丁烷基]氧基]乙酸(1)的合成。在THF / H 2 O中,在碳酸钾的存在下,将由丝氨酸和苏氨酸制备的3-[(碳苄氧基)氨基] -N-羟基-2-氮杂环丁酮(13a,b)与溴化2-(三甲基甲硅烷基)乙基乙酸乙酯烷基化。用仲α-溴代酯的烷基化反应是用氢氧化钾在二甲基亚砜中完成的。通过催化加氢,然后用21处理,将Cbz基团替换为2-(2-氨基-4-噻唑基)-2(Z)-(甲氧基亚氨基)乙酰氨基侧链,然后用21处理。将2-(三甲基甲硅烷基)乙酯去除。氟离子提供的衍生物适合进行抗菌评估。体外试验表明,标题化合物主要对革兰氏阴性菌具有重要活性。
Solid-Phase Synthesis of β-Lactams via the Miller Hydroxamate Approach
作者:Marco Massimiliano Meloni、Maurizio Taddei
DOI:10.1021/ol006779z
日期:2001.2.1
[figure: see text] beta-Lactams were prepared on solid phase starting from serine, threonine, or other beta-hydroxyacids derived from naturally occurring amino acids and a resin bound hydroxylamine. The ring closure was carried out under Mitsunobu conditions. The amino group present on the beta-lactam was used to assemble a short peptide. After a reductive cleavage with Sml2, beta-lactam-containing