(2S,3R,4R,5S,6R)-3-Benzyloxy-4,5-dimethoxy-2-methyl-6-phenylsulfanyl-tetrahydro-pyran | 163494-00-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2S,3R,4R,5S,6R)-3-Benzyloxy-4,5-dimethoxy-2-methyl-6-phenylsulfanyl-tetrahydro-pyran
• CAS: 163494-00-6
• 化学式: C₂₁H₂₆O₄S
• 分子量: 374.501
• InChiKey: YORIMGUESBAUFC-FYIGHOIKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.14
• 重原子数：
  26.0
• 可旋转键数：
  7.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  36.92
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  (2S,3R,4R,5S,6R)-3-Benzyloxy-4,5-dimethoxy-2-methyl-6-phenylsulfanyl-tetrahydro-pyran 在 N-溴代丁二酰亚胺(NBS) 、 silver perchlorate 、 tin(ll) chloride 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 生成 Acetic acid (2S,3R,4S,5R)-5-acetoxy-4-((2R,3S,4R,5R,6S)-5-benzyloxy-3,4-dimethoxy-6-methyl-tetrahydro-pyran-2-yloxy)-2-phenylsulfanyl-tetrahydro-pyran-3-yl ester
  参考文献：
  名称：

  Total Synthesis of Polycavernoside A, A Lethal Toxin of the Red Alga Polycavernosa tsudai

  摘要：

  Two approaches to the synthesis of the aglycon 120 of polycavernoside A (1) were developed, only one of which was completed. The successful "second-generation" route assembled the aglycon seco acids 102 and 106 via Nozaki-Hiyama-Kishi coupling of aldehyde 70, prepared from methyl (S)3-hydroxy-2-methylpropionate (72) and (S)-pantolactone (73), with vinyl bromide 71. The latter was obtained from a sequence which commenced from the silyl ether 24 of 3-hydroxypropionaldehyde and entailed cyclization of (Z)-zeta -hydroxy-alpha,beta-unsaturated ester 82. Regioselective Yamaguchi lactonization of trihydroxycarboxylic acids 102 and 106 and subsequent functional-group adjustments led to macrolactone 120, to which the fucopyranosylxylopyranoside moiety was attached. Stille coupling of the glycosidated aglycon 128 with dienylstannane 129 furnished polycavernoside A in a synthesis for which the longest linear sequence was 25 steps. The overall yield to lactone 120 was 4.7%.

  DOI：

  10.1021/jo0503862
• 作为产物：
  描述：

  溴甲苯 、 phenyl 2,3-di-O-methyl-1-thio-β-L-fucopyranoside 在 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 以74%的产率得到(2S,3R,4R,5S,6R)-3-Benzyloxy-4,5-dimethoxy-2-methyl-6-phenylsulfanyl-tetrahydro-pyran
  参考文献：
  名称：

  Total Synthesis of Polycavernoside A, A Lethal Toxin of the Red Alga Polycavernosa tsudai

  摘要：

  Two approaches to the synthesis of the aglycon 120 of polycavernoside A (1) were developed, only one of which was completed. The successful "second-generation" route assembled the aglycon seco acids 102 and 106 via Nozaki-Hiyama-Kishi coupling of aldehyde 70, prepared from methyl (S)3-hydroxy-2-methylpropionate (72) and (S)-pantolactone (73), with vinyl bromide 71. The latter was obtained from a sequence which commenced from the silyl ether 24 of 3-hydroxypropionaldehyde and entailed cyclization of (Z)-zeta -hydroxy-alpha,beta-unsaturated ester 82. Regioselective Yamaguchi lactonization of trihydroxycarboxylic acids 102 and 106 and subsequent functional-group adjustments led to macrolactone 120, to which the fucopyranosylxylopyranoside moiety was attached. Stille coupling of the glycosidated aglycon 128 with dienylstannane 129 furnished polycavernoside A in a synthesis for which the longest linear sequence was 25 steps. The overall yield to lactone 120 was 4.7%.

  DOI：

  10.1021/jo0503862

文献信息

• Synthesis and Relative Configuration of the Sugar Part of a Marine Toxin Polycavernoside-A
  作者：Kenshu Fujiwara、Seiji Amano、Akio Murai

  DOI：10.1246/cl.1995.191

  日期：1995.3

  Construction of the sugar part of polycavernoside-A, which has been isolated as one of toxic principles from the red alga Polycavernosa tsudai, is described starting from l-fucose and d-xylose in order to elucidate the relative stereochemistry.

  本文描述了从l-岩借糖和d-木糖出发构建红藻Polycavernosa tsudai中分离出的毒性成分之一多腔糖苷-A的糖部分，以阐明相对立体化学。