(2S,3R)-2-<(2,3-Dihydroxybenzoyl)amino>-3-hydroxy-4-(4-nitrophenyl)butanoic acid | 99268-39-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (2S,3R)-2-<(2,3-Dihydroxybenzoyl)amino>-3-hydroxy-4-(4-nitrophenyl)butanoic acid
• 英文别名: Obafluroin beta-hydroxy carboxylic acid；(2S,3R)-2-[(2,3-dihydroxybenzoyl)amino]-3-hydroxy-4-(4-nitrophenyl)butanoic acid
• CAS: 99268-39-0
• 化学式: C₁₇H₁₆N₂O₈
• 分子量: 376.323
• InChiKey: IKEPVTXZQSIGBO-KGLIPLIRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  27
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  173
• 氢给体数：
  5
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  重氮甲烷 、 (1S)-(-)-莰烷酰氯 、 (2S,3R)-2-<(2,3-Dihydroxybenzoyl)amino>-3-hydroxy-4-(4-nitrophenyl)butanoic acid 生成 Methyl (2S,3R)-2-<(S)-camphanamido>-3-hydroxy-4-(4-nitrophenyl)butanoate
  参考文献：
  名称：

  Synthesis, Stability, and Antimicrobial Activity of (+)-Obafluorin and Related .beta.-Lactone Antibiotics

  摘要：

  Optically pure obafluorin(l), an antibacterial agent from Pseudomonas fluorescens, was synthesized in six steps via lactonization of N-[(2-nitrophenyl)sulfenyl]-(2S,3R)-2-amino-3-hydroxy-4-(4-nitrophenyl)butanoic acid (12a), which was prepared in a stereospecific manner from 4-nitrophenylacetaldehyde (9a) and (S)-1-benzoyl-2-tert-butyl-3-methyl-4-imidazolidinone (7). A series of analogues was then synthesized in order to probe structural features required for antibacterial activity as well as those responsible for the hydrolytic decomposition of 1 to the corresponding hydroxy acid 23a. Analogues 22b and 22e wherein the nitro group of 1 is replaced with hydrogen and chlorine, respectively, were prepared in a fashion similar to 1, as were the N-acetyl, N-benzoyl, and N-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetyl (ATMO) derivatives 24a-c. The tosylate salt of L-threonine-beta-lactone (21) was transformed to a series of N-acylated derivatives including the following: 22d (2,3-dihydroxybenzoyl), 25 (2-hydroxybenzoyl), 27 (3,4-dihydroxybenzoyl), 29 (4'methyl-2,2'-bipyridine-4-carbonyl), 31 (epsilon-(L-alpha-aminoadipoyl)), 34 ((N'-2,3-dihydroxybenzoyl)-beta-alanyl), 35 (bromoacetyl), 36 ((6-purinylthio)acetyl), and 37 ((4-pyridylthio)acetyl). The results show that a-amino beta-lactones bearing an N-acyl group with an o- or p-hydroxybenzoyl moiety are especially prone to decomposition under aqueous conditions and that this effect is enhanced by replacement of the 4-nitrobenzyl group on the oxetanone ring of 1 with a methyl. The N-(3,4-dihydroxybenzoyl)L-threonine beta-lactone (27) converts slowly in the solid state to (4S,5S)-2-(3,4-dihydroxybenzoyl)-5-methyl-2-oxazoline-4-carboxylic acid (39b), which hydrolyzes rapidly in 4:1 CD3CN:D2O to O-(3,4-dihydroxybenzoyl)-L-allothreonine (38b). Direct hydrolysis of 27 to 38b under the same conditions has a half-life of 2.4 days. Preliminary assays for antibacterial activity indicate that 29 has nearly comparable activity to obafluorin(l) but is much more stable. The (2-nitrophenyl)sulfenyl p-lactones 14 and 41, as well as the N-(phenylsulfenyl)-L-threonine beta-lactone (44), are the most active agents in the biological assays.

  DOI：

  10.1021/jo00092a025
• 作为产物：
  描述：

  黄荧菌素 在 水 作用下， 以 乙腈 为溶剂， 生成 (2S,3R)-2-<(2,3-Dihydroxybenzoyl)amino>-3-hydroxy-4-(4-nitrophenyl)butanoic acid
  参考文献：
  名称：

  Synthesis, Stability, and Antimicrobial Activity of (+)-Obafluorin and Related .beta.-Lactone Antibiotics

  摘要：

  Optically pure obafluorin(l), an antibacterial agent from Pseudomonas fluorescens, was synthesized in six steps via lactonization of N-[(2-nitrophenyl)sulfenyl]-(2S,3R)-2-amino-3-hydroxy-4-(4-nitrophenyl)butanoic acid (12a), which was prepared in a stereospecific manner from 4-nitrophenylacetaldehyde (9a) and (S)-1-benzoyl-2-tert-butyl-3-methyl-4-imidazolidinone (7). A series of analogues was then synthesized in order to probe structural features required for antibacterial activity as well as those responsible for the hydrolytic decomposition of 1 to the corresponding hydroxy acid 23a. Analogues 22b and 22e wherein the nitro group of 1 is replaced with hydrogen and chlorine, respectively, were prepared in a fashion similar to 1, as were the N-acetyl, N-benzoyl, and N-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetyl (ATMO) derivatives 24a-c. The tosylate salt of L-threonine-beta-lactone (21) was transformed to a series of N-acylated derivatives including the following: 22d (2,3-dihydroxybenzoyl), 25 (2-hydroxybenzoyl), 27 (3,4-dihydroxybenzoyl), 29 (4'methyl-2,2'-bipyridine-4-carbonyl), 31 (epsilon-(L-alpha-aminoadipoyl)), 34 ((N'-2,3-dihydroxybenzoyl)-beta-alanyl), 35 (bromoacetyl), 36 ((6-purinylthio)acetyl), and 37 ((4-pyridylthio)acetyl). The results show that a-amino beta-lactones bearing an N-acyl group with an o- or p-hydroxybenzoyl moiety are especially prone to decomposition under aqueous conditions and that this effect is enhanced by replacement of the 4-nitrobenzyl group on the oxetanone ring of 1 with a methyl. The N-(3,4-dihydroxybenzoyl)L-threonine beta-lactone (27) converts slowly in the solid state to (4S,5S)-2-(3,4-dihydroxybenzoyl)-5-methyl-2-oxazoline-4-carboxylic acid (39b), which hydrolyzes rapidly in 4:1 CD3CN:D2O to O-(3,4-dihydroxybenzoyl)-L-allothreonine (38b). Direct hydrolysis of 27 to 38b under the same conditions has a half-life of 2.4 days. Preliminary assays for antibacterial activity indicate that 29 has nearly comparable activity to obafluorin(l) but is much more stable. The (2-nitrophenyl)sulfenyl p-lactones 14 and 41, as well as the N-(phenylsulfenyl)-L-threonine beta-lactone (44), are the most active agents in the biological assays.

  DOI：

  10.1021/jo00092a025

文献信息

• β-Lactone formation during product release from a nonribosomal peptide synthetase
  作者：Jason E Schaffer、Margaret R Reck、Neha K Prasad、Timothy A Wencewicz

  DOI：10.1038/nchembio.2374

  日期：2017.7

  respectively. Here we report the enzyme-catalyzed formation of a highly strained β-lactone ring during TE-mediated cyclization of a β-hydroxythioester to release the antibiotic obafluorin (Obi) from an NRPS assembly line. The Obi NRPS (ObiF) contains a type I TE domain with a rare catalytic cysteine residue that plays a direct role in β-lactone ring formation. We present a detailed genetic and biochemical

  非核糖体肽合成酶（NRPS）是多域模块化生物合成装配线，可将氨基酸聚合成无数的具有生物活性的非核糖体肽（NRP）。NRPS硫酯酶（TE）域采用多种释放策略，通常通过水解，氨解或环化作用从末端模块上卸下硫酯束缚的聚合肽，以分别提供成熟的抗生素，分别为羧酸/酯，酰胺和内酰胺/内酯。在这里，我们报告了在TE介导的β-羟基硫酯的环化过程中，从NRPS组装生产线释放抗生素的obafluorin（Obi）的过程中，酶催化的高张力β-内酯环的形成。Obi NRPS（ObiF）包含一个I型TE结构域，该结构域具有一个罕见的催化半胱氨酸残基，该残基在β-内酯环的形成中起着直接作用。荧光假单胞菌ATCC 39502建立了β-内酯生物发生的一般策略。
• Synthesis of (+)-obafluorin, a .beta.-lactone antibiotic
  作者：Christopher Lowe、Yunlong Pu、John C. Vederas

  DOI：10.1021/jo00027a006

  日期：1992.1

  Optically pure obafluorin (1), an antibacterial agent from Pseudomonas fluorescens, was synthesized via lactonization of N-[(2-nitrophenyl)sulfenyl]-(2S,3R)-2-amino-3-hydroxy-4-(4-nitrophenyl)butanoic acid (6), which was prepared in a stereospecific manner from 4-nitrophenylacetaldehyde and (S)-1-benzoyl-2-(tert-butyl)-3-methyl-4-imidazolidinone (4a).
• Synthesis, Stability, and Antimicrobial Activity of (+)-Obafluorin and Related .beta.-Lactone Antibiotics
  作者：Yunlong Pu、Christopher Lowe、Miloslav Sailer、John C. Vederas

  DOI：10.1021/jo00092a025

  日期：1994.7

  Optically pure obafluorin(l), an antibacterial agent from Pseudomonas fluorescens, was synthesized in six steps via lactonization of N-[(2-nitrophenyl)sulfenyl]-(2S,3R)-2-amino-3-hydroxy-4-(4-nitrophenyl)butanoic acid (12a), which was prepared in a stereospecific manner from 4-nitrophenylacetaldehyde (9a) and (S)-1-benzoyl-2-tert-butyl-3-methyl-4-imidazolidinone (7). A series of analogues was then synthesized in order to probe structural features required for antibacterial activity as well as those responsible for the hydrolytic decomposition of 1 to the corresponding hydroxy acid 23a. Analogues 22b and 22e wherein the nitro group of 1 is replaced with hydrogen and chlorine, respectively, were prepared in a fashion similar to 1, as were the N-acetyl, N-benzoyl, and N-2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetyl (ATMO) derivatives 24a-c. The tosylate salt of L-threonine-beta-lactone (21) was transformed to a series of N-acylated derivatives including the following: 22d (2,3-dihydroxybenzoyl), 25 (2-hydroxybenzoyl), 27 (3,4-dihydroxybenzoyl), 29 (4'methyl-2,2'-bipyridine-4-carbonyl), 31 (epsilon-(L-alpha-aminoadipoyl)), 34 ((N'-2,3-dihydroxybenzoyl)-beta-alanyl), 35 (bromoacetyl), 36 ((6-purinylthio)acetyl), and 37 ((4-pyridylthio)acetyl). The results show that a-amino beta-lactones bearing an N-acyl group with an o- or p-hydroxybenzoyl moiety are especially prone to decomposition under aqueous conditions and that this effect is enhanced by replacement of the 4-nitrobenzyl group on the oxetanone ring of 1 with a methyl. The N-(3,4-dihydroxybenzoyl)L-threonine beta-lactone (27) converts slowly in the solid state to (4S,5S)-2-(3,4-dihydroxybenzoyl)-5-methyl-2-oxazoline-4-carboxylic acid (39b), which hydrolyzes rapidly in 4:1 CD3CN:D2O to O-(3,4-dihydroxybenzoyl)-L-allothreonine (38b). Direct hydrolysis of 27 to 38b under the same conditions has a half-life of 2.4 days. Preliminary assays for antibacterial activity indicate that 29 has nearly comparable activity to obafluorin(l) but is much more stable. The (2-nitrophenyl)sulfenyl p-lactones 14 and 41, as well as the N-(phenylsulfenyl)-L-threonine beta-lactone (44), are the most active agents in the biological assays.