(2S,3S)-4-(benzyloxy)-3-hydroxy-N-methoxy-N,2-dimethylbutanamide | 162255-08-5

• 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,3S)-4-(benzyloxy)-3-hydroxy-N-methoxy-N,2-dimethylbutanamide
• 英文别名: (2S,3S)-3-hydroxy-N-methoxy-N,2-dimethyl-4-phenylmethoxybutanamide
• CAS: 162255-08-5
• 化学式: C₁₄H₂₁NO₄
• 分子量: 267.325
• InChiKey: DRUADHXIDDOYPS-WCQYABFASA-N

物化性质

• 沸点：
  388.6±52.0 °C(Predicted)
• 密度：
  1.129±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  19
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  59
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (2S,3S)-4-(benzyloxy)-3-hydroxy-N-methoxy-N,2-dimethylbutanamide 在 吡啶 、 咪唑 、 titanium(IV) isopropylate 、 叔丁基过氧化氢 、 copper(l) iodide 、 4 A molecular sieve 、 potassium tert-butylate 、 二异丁基氢化铝 、 (+)-Weinsaeure-diethylester 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 16.5h， 生成 Toluene-4-sulfonic acid (2R,3R,4R,5S)-6-benzyloxy-5-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-2,4-dimethyl-hexyl ester
  参考文献：
  名称：

  Aplyronine A, a Potent Antitumor Substance of Marine Origin, Aplyronines B and C, and Artificial Analogues:  Total Synthesis and Structure−Cytotoxicity Relationships

  摘要：

  The enantioselective total synthesis of aplyronine A (1), a potent antitumor substance of marine origin, was achieved by a convergent-approach Three segments 4, 5, and 6, corresponding to the C5-C11, C21-C27, and C28-C34 portions of aplyronine A (1), were prepared using:the Evans aldol reaction and the Sharpless epoxidation as key steps. The coupling reaction of 4 with iodide 7 followed by julia olefination with sulfone 8 gave the C5-C20 segment 9, while the julia coupling reaction between segments 5 and 6 provided the C21-C34 segment 10. Julia olefination between segments 9 and 10 and the subsequent four-carbon homologation reaction led to seco acid 83, which was converted into aplyronine A (1) by Yamaguchi lactonization followed by the introduction of two amino acids. The use of the [(3,4-dimethoxybenzyl)oxy]methyl group as a protecting group for the hydroxyl at C29 was crucial for this synthesis. The enantioselective synthesis of two natural congeners, aplyronines B (2) acid C (3), was also carried out using the intermediates for the synthesis of 1, which determined the absolute stereostructures of 2 and 3 unambiguously. To study the structure-cytotoxicity relationships of aplyronines, artificial analogues of 1 were synthesized and their cytotoxicities were evaluated: the trimethylserine moiety, two hydroxyl groups, and the side-chain portion in 1 turned out to be important in the potent cytotoxicity shown by 1. Biological studies with aplyronine A (1) showed that 1 inhibited polymerization of G-actin to F-actin and depolymerized F-actin to G-actin.

  DOI：

  10.1021/jo9606113
• 作为产物：
  描述：

  苄氧基乙醛 在 三氟甲磺酸二丁硼 、 Me2AlN(Me)OMe 、 三乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 生成 (2S,3S)-4-(benzyloxy)-3-hydroxy-N-methoxy-N,2-dimethylbutanamide
  参考文献：
  名称：

  海洋来源的有效抗肿瘤物质Aplyronine A的合成研究：C21–C34段的立体合成

  摘要：

  丙烯醛A（1）的C21–C34片段2是一种有效的海洋来源抗肿瘤物质，是由酰亚胺11以25个步骤（总收率17％）对映选择性合成的。

  DOI：

  10.1016/0040-4039(94)88035-2

文献信息

• Total Synthesis of the Polyether Antibiotic Lonomycin A (Emericid)
  作者：David A. Evans、Andrew M. Ratz、Bret E. Huff、George S. Sheppard

  DOI：10.1021/ja00117a014

  日期：1995.3

  The first asymmetric synthesis of the polyether antibiotic lonomycin has been achieved. The skeleton is assembled through the synthesis and union of two subunits comprising the CI-CII and C12-C3o portions of the structure. These fragments were constructed utilizing auxiliary-based asymmetric aldol and acylation reactions to control the absolute stereochemical relationships in the structure. The majority

  首次不对称合成聚醚类抗生素朗霉素已经实现。骨架是通过两个亚基的合成和结合来组装的，这些亚基包括结构的 CI-CII 和 C12-C30 部分。这些片段是利用基于辅助的不对称醛醇和酰化反应构建的，以控制结构中的绝对立体化学关系。分子聚醚部分中的大部分 1 , Z 氧关系是通过一系列环氧化反应建立的，这些环氧化反应通过分子内杂环化转化为环 D、E 和 F。主要亚基通过高度非对映选择性羟醛反应偶联构建 C11 -C12 键。
• Enantioselective synthesis of δ-/γ-alkoxy-β-hydroxy-α-alkyl-substituted Weinreb amides via DKR–ATH: application to the synthesis of advanced intermediate of (−)-brevisamide
  作者：Gullapalli Kumaraswamy、Akula Narayana Murthy、Vykunthapu Narayanarao、Sahithya Phani Babu Vemulapalli、Jagadeesh Bharatam

  DOI：10.1039/c3ob41088a

  日期：——

  A method of preparing stereodefined δ-/γ-alkoxy-β-hydroxy-α-alkyl-substituted Weinreb amides containing two successive hydroxyl-alkyl stereocenters has been developed. Further, this strategy coupled with organo-catalyzed asymmetric epoxidation culminates in the synthesis of a critical intermediate of (−)-brevisamide and its diastereomers.

  一种制备立体定义的δ-/γ-烷氧基-β-羟基-α-烷基取代的温雷布酰胺的方法已经开发出来。此外，该策略结合了有机催化的不对称环氧化反应，最终合成了(−)-布雷维酰胺及其二叠体的关键中间体。
• A novel stereoselective route to some uncommon amino acids
  作者：Clay Pearson、Kenneth L Rinehart、Michihiro Sugano

  DOI：10.1016/s0040-4039(98)02383-1

  日期：1999.1

  of ad-erythro-β-methylaspartic acid analog was achieved in six steps from commercially available material. Evans' aldol reactions were utilized followed by Weinreb amide formation and Mitsunobu inversion to achieve the necessary stereochemistry of the amino acid target. The technique was applied to the synthesis of an aspartic acid analog as well as a diaminobutyric acid analog.

  用市售材料通过六个步骤即可高效合成赤型-β-甲基天冬氨酸类似物。利用埃文斯的醛醇缩合反应，随后形成韦氏脲酰胺和光延反转，以实现氨基酸靶标的必要立体化学。该技术被应用于天冬氨酸类似物以及二氨基丁酸类似物的合成。
• Lasonolide A:  Structural Revision and Total Synthesis
  作者：Ho Young Song、Jung Min Joo、Jung Won Kang、Dae-Shik Kim、Cheol-Kyu Jung、Hyo Shin Kwak、Jin Hyun Park、Eun Lee、Chang Yong Hong、ShinWu Jeong、Kiwan Jeon、Ji Hyun Park

  DOI：10.1021/jo034930n

  日期：2003.10.1

  The proposed structure of lasonolide A was synthesized employing radical cyclization reactions of beta-alkoxyacrylates for preparation of the tetrahydropyranyl units A and B, but the spectroscopic data did not match those of the natural product. Both enantiomers of a revised structure featuring 17E,25Z double bonds were synthesized, and the (-)-isomer was found to be the biologically active enantiomer.