Ethyl (2Z,4R)-4,6-bis<oxy>-2-methyl-3-<(1,1-dimethylethoxy)carbonyl>-2-hexenoate | 158466-56-9

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: Ethyl (2Z,4R)-4,6-bis<oxy>-2-methyl-3-<(1,1-dimethylethoxy)carbonyl>-2-hexenoate
• CAS: 158466-56-9
• 化学式: C₂₈H₅₆O₆Si₂
• 分子量: 544.92
• InChiKey: QHPSFVJWDLYBSE-QQYUXEJHSA-N

物化性质

• 沸点：
  532.4±50.0 °C(predicted)
• 密度：
  0.945±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  7.79
• 重原子数：
  36.0
• 可旋转键数：
  16.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  71.06
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  Ethyl (2Z,4R)-4,6-bis<oxy>-2-methyl-3-<(1,1-dimethylethoxy)carbonyl>-2-hexenoate 在 溶剂黄146 作用下， 以 四氢呋喃 为溶剂， 反应 4.0h， 以95%的产率得到Ethyl (2Z,4R)-4-<oxy>-6-hydroxy-2-methyl-3-<(1,1-dimethylethoxy)carbonyl>-2-hexenoate
  参考文献：
  名称：

  Total Synthesis of Tautomycin

  摘要：

  A convergent stereocontrolled synthesis of the antifungal antibiotic tautomycin, a potent protein phosphatases inhibitor, has been achieved first via key aldol coupling of two large subunits, a right-hand C-1-C-21 ketone and a left-hand aldehyde (left from C-22). The C-1-C-10 segment was synthesized through a remote stereochemical control process using a spiroketal template. After joining with the C-11-C-18 segment, the spiroketal moiety was selectively constructed. Then the right-hand C-1-C-21 ketone was synthesized via Roush asymmetric crotylboration. The left-hand aldehyde was prepared from a C-21-C-26 Segment and a dialkylmaleic anhydride segment. Completely stereoselective assemblage of the two subunits, the right-hand and the left-hand, was achieved by employing the Mukaiyama aldol reaction. Further functional group manipulations including desilylation, oxidation at C-2, and deprotection of tert-butyl ester with concomitant anhydride formation provided tautomycin which was identical with the natural product. As a preliminary study, derivatizations and degradation of the natural product were also examined to support the total synthesis.

  DOI：

  10.1021/jo00121a026
• 作为产物：
  描述：

  1,1-Dimethylethyl (αS,2R,4R)-α-hydroxy-2-(3,4-dimethoxyphenyl)-1,3-dioxane-4-acetate 在 吡啶 、 咪唑 、 potassium tert-butylate 、 4-甲基苯磺酸吡啶 、 戴斯-马丁氧化剂 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 反应 28.17h， 生成 Ethyl (2Z,4R)-4,6-bis<oxy>-2-methyl-3-<(1,1-dimethylethoxy)carbonyl>-2-hexenoate
  参考文献：
  名称：

  Total Synthesis of Tautomycin

  摘要：

  A convergent stereocontrolled synthesis of the antifungal antibiotic tautomycin, a potent protein phosphatases inhibitor, has been achieved first via key aldol coupling of two large subunits, a right-hand C-1-C-21 ketone and a left-hand aldehyde (left from C-22). The C-1-C-10 segment was synthesized through a remote stereochemical control process using a spiroketal template. After joining with the C-11-C-18 segment, the spiroketal moiety was selectively constructed. Then the right-hand C-1-C-21 ketone was synthesized via Roush asymmetric crotylboration. The left-hand aldehyde was prepared from a C-21-C-26 Segment and a dialkylmaleic anhydride segment. Completely stereoselective assemblage of the two subunits, the right-hand and the left-hand, was achieved by employing the Mukaiyama aldol reaction. Further functional group manipulations including desilylation, oxidation at C-2, and deprotection of tert-butyl ester with concomitant anhydride formation provided tautomycin which was identical with the natural product. As a preliminary study, derivatizations and degradation of the natural product were also examined to support the total synthesis.

  DOI：

  10.1021/jo00121a026

文献信息

• Total synthesis of tautomycin: Efficient aldol coupling of two large subunits
  作者：Hideaki Oikawa、Masato Oikawa、Tohru Ueno、Akitami Ichihara

  DOI：10.1016/s0040-4039(00)76974-7

  日期：1994.7

  The total synthesis of tautomycin 1 has been achieved via key aldol condensati