tert-butyl (5S,6R,2E)-5-hydroxy-6-methyl-2,7-octadienoate | 311341-99-8

• 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: tert-butyl (5S,6R,2E)-5-hydroxy-6-methyl-2,7-octadienoate
• 英文别名: tert-butyl (2E,5S,6R)-5-hydroxy-6-methylocta-2,7-dienoate
• CAS: 311341-99-8
• 化学式: C₁₃H₂₂O₃
• 分子量: 226.316
• InChiKey: UEKMXNXYIJFREH-HDNGXNTCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  16
• 可旋转键数：
  7
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.62
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  tert-butyl (5S,6R,2E)-5-hydroxy-6-methyl-2,7-octadienoate 在 palladium diacetate 4-二甲氨基吡啶 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、 三乙胺 、 N,N-二异丙基乙胺 、 三氟乙酸 作用下， 以 四氢呋喃 、 二氯甲烷 、 乙腈 为溶剂， 反应 22.75h， 生成 desepoxyarenastatin A
  参考文献：
  名称：

  Total Synthesis of Cryptophycin-24 (Arenastatin A) Amenable to Structural Modifications in the C16 Side Chain

  摘要：

  Two efficient protocols for the synthesis of tert-butyl (5S,6R,2E,7E)-5-[(tert-butyldimethylsily oxy]-6-methyl-8-phenyl-2,7-octadienoate, a major component of the cryptophycins, are reported. The first utilized the Noyori reduction and Frater alkylation of methyl 5-benzyloxy-3-oxopentanoate to set two stereogenic centers, which became the C16 hydroxyl and C1' methyl oft-he cryptophycins. The second approach started from 3-p-methoxybenzyloxypropanal and a crotyl borane reagent derived from (-)-alpha -pinene to set both stereocenters in a single step and provided the dephenyl analogue, tert-butyl(5S,6R,2E)-5-[(tert-butyldimethylsilyl)oxy]-6 -methyl-2,7 -octadienoate, in five steps. This compound was readily converted to the 8-phenyl compound via Heck coupling. The silanyloxy esters were efficiently deprotected and coupled to the C2-C10 amino acid fragment to provide desepoxyarenastatin A and its dephenyl analogue. The terminal olefin of the latter was further elaborated via Heck coupling. Epoxidation provided cryptophycin-24 (arenastatin A).

  DOI：

  10.1021/jo000767+
• 作为产物：
  描述：

  二乙基膦酰基乙酸叔丁酯 在 amberlyst-15 、 四丁基氟化铵 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 lithium chloride 作用下， 以 四氢呋喃 、 乙腈 为溶剂， 反应 7.0h， 生成 tert-butyl (5S,6R,2E)-5-hydroxy-6-methyl-2,7-octadienoate
  参考文献：
  名称：

  Total Synthesis of Cryptophycin-24 (Arenastatin A) Amenable to Structural Modifications in the C16 Side Chain

  摘要：

  Two efficient protocols for the synthesis of tert-butyl (5S,6R,2E,7E)-5-[(tert-butyldimethylsily oxy]-6-methyl-8-phenyl-2,7-octadienoate, a major component of the cryptophycins, are reported. The first utilized the Noyori reduction and Frater alkylation of methyl 5-benzyloxy-3-oxopentanoate to set two stereogenic centers, which became the C16 hydroxyl and C1' methyl oft-he cryptophycins. The second approach started from 3-p-methoxybenzyloxypropanal and a crotyl borane reagent derived from (-)-alpha -pinene to set both stereocenters in a single step and provided the dephenyl analogue, tert-butyl(5S,6R,2E)-5-[(tert-butyldimethylsilyl)oxy]-6 -methyl-2,7 -octadienoate, in five steps. This compound was readily converted to the 8-phenyl compound via Heck coupling. The silanyloxy esters were efficiently deprotected and coupled to the C2-C10 amino acid fragment to provide desepoxyarenastatin A and its dephenyl analogue. The terminal olefin of the latter was further elaborated via Heck coupling. Epoxidation provided cryptophycin-24 (arenastatin A).

  DOI：

  10.1021/jo000767+

文献信息

• Total Synthesis of Cryptophycin-24 (Arenastatin A) Amenable to Structural Modifications in the C16 Side Chain
  作者：MariJean Eggen、Craig J. Mossman、Suzanne B. Buck、Sajiv K. Nair、Laxminarayan Bhat、Syed M. Ali、Emily A. Reiff、Thomas C. Boge、Gunda I. Georg

  DOI：10.1021/jo000767+

  日期：2000.11.1

  Two efficient protocols for the synthesis of tert-butyl (5S,6R,2E,7E)-5-[(tert-butyldimethylsily oxy]-6-methyl-8-phenyl-2,7-octadienoate, a major component of the cryptophycins, are reported. The first utilized the Noyori reduction and Frater alkylation of methyl 5-benzyloxy-3-oxopentanoate to set two stereogenic centers, which became the C16 hydroxyl and C1' methyl oft-he cryptophycins. The second approach started from 3-p-methoxybenzyloxypropanal and a crotyl borane reagent derived from (-)-alpha -pinene to set both stereocenters in a single step and provided the dephenyl analogue, tert-butyl(5S,6R,2E)-5-[(tert-butyldimethylsilyl)oxy]-6 -methyl-2,7 -octadienoate, in five steps. This compound was readily converted to the 8-phenyl compound via Heck coupling. The silanyloxy esters were efficiently deprotected and coupled to the C2-C10 amino acid fragment to provide desepoxyarenastatin A and its dephenyl analogue. The terminal olefin of the latter was further elaborated via Heck coupling. Epoxidation provided cryptophycin-24 (arenastatin A).