(4R,5S,E)-ethyl 6-(benzyloxy)-5-(tert-butyldimethylsilyloxy)-4-methylhex-2-enoate | 179945-15-4

• 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: (4R,5S,E)-ethyl 6-(benzyloxy)-5-(tert-butyldimethylsilyloxy)-4-methylhex-2-enoate
• CAS: 179945-15-4
• 化学式: C₂₂H₃₆O₄Si
• 分子量: 392.611
• InChiKey: HIQITEKBUQDTQI-UYOCBDTKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.35
• 重原子数：
  27.0
• 可旋转键数：
  10.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  44.76
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  (4R,5S,E)-ethyl 6-(benzyloxy)-5-(tert-butyldimethylsilyloxy)-4-methylhex-2-enoate 在 sodium persulfate 、 锂硼氢 、 (2S,5R)‐2‐(tert‐butyl)‐3,5‐dimethylimidazolidin‐4‐one trifluoroacetate 、 coppertrifluoroacetate hydrate 、 戴斯-马丁氧化剂 、 lithium chloride 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 水 、 乙腈 为溶剂， 反应 21.25h， 生成 ((2S,3R)-1-(benzyloxy)-3-methyl-4-((R)-oxiran-2-yl)butan-2-yloxy)-(tert-butyl)dimethylsilane
  参考文献：
  名称：

  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

  摘要：

  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。

  DOI：

  10.1039/c3ob41088a
• 作为产物：
  描述：

  (2S,3S)-4-(benzyloxy)-3-hydroxy-N-methoxy-N,2-dimethylbutanamide 在 咪唑 、 二异丁基氢化铝 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 18.0h， 生成 (4R,5S,E)-ethyl 6-(benzyloxy)-5-(tert-butyldimethylsilyloxy)-4-methylhex-2-enoate
  参考文献：
  名称：

  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

  摘要：

  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。

  DOI：

  10.1039/c3ob41088a

文献信息

• Aplyronine A, a Potent Antitumor Substance of Marine Origin, Aplyronines B and C, and Artificial Analogues:  Total Synthesis and Structure−Cytotoxicity Relationships
  作者：Hideo Kigoshi、Kiyotake Suenaga、Tsuyoshi Mutou、Takeshi Ishigaki、Toshiyuki Atsumi、Hiroyuki Ishiwata、Akira Sakakura、Takeshi Ogawa、Makoto Ojika、Kiyoyuki Yamada

  DOI：10.1021/jo9606113

  日期：1996.1.1

  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.