Toluene-4-sulfonic acid (2S,4R)-4-methoxy-2-methyl-5-trityloxy-pentyl ester | 179945-03-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 三苯基化合物
• 英文名称: Toluene-4-sulfonic acid (2S,4R)-4-methoxy-2-methyl-5-trityloxy-pentyl ester
• CAS: 179945-03-0
• 化学式: C₃₃H₃₆O₅S
• 分子量: 544.712
• InChiKey: VUPKRXORLRFBKO-JTSJOTPCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.75
• 重原子数：
  39.0
• 可旋转键数：
  13.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  61.83
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  Toluene-4-sulfonic acid (2S,4R)-4-methoxy-2-methyl-5-trityloxy-pentyl ester 在 吡啶 、 disodium hydrogenphosphate 、 sodium amalgam 、 正丁基锂 、 甲酸 、 乙酸酐 、 戴斯-马丁氧化剂 、 溶剂黄146 、 三氯氧磷 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 、 水 为溶剂， 反应 48.02h， 生成 2,2-Dimethyl-propionic acid (10E,16E)-(3R,4R,5R,6R,9S,13R,15R)-5-(tert-butyl-dimethyl-silanyloxy)-9,15-dimethoxy-4,6,10,13-tetramethyl-3-methylsulfanylmethoxy-19-triethylsilanyloxy-nonadeca-10,16-dienyl 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：

  对甲苯磺酰氯 、 (2S,4R)-4-Methoxy-2-methyl-5-trityloxy-pentan-1-ol 在 吡啶 作用下， 反应 2.5h， 生成 Toluene-4-sulfonic acid (2S,4R)-4-methoxy-2-methyl-5-trityloxy-pentyl 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

文献信息

• Total Synthesis of Aplyronine A, a Potent Antitumor Substance of Marine Origin
  作者：Hideo Kigoshi、Makoto Ojika、Takeshi Ishigaki、Kiyotake Suenaga、Tsuyoshi Mutou、Akira Sakakura、Takeshi Ogawa、Kiyoyuki Yamada

  DOI：10.1021/ja00095a072

  日期：1994.8