methyl (2S,3S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-2-methylpentanoate | 188926-23-0

• 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: methyl (2S,3S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-2-methylpentanoate
• 英文别名: methyl (2S,3S)-3,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methylpentanoate
• CAS: 188926-23-0
• 化学式: C₁₉H₄₂O₄Si₂
• 分子量: 390.711
• InChiKey: ZJBLXGMRFLNDLI-HOTGVXAUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.6
• 重原子数：
  25
• 可旋转键数：
  11
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.95
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  methyl (2S,3S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-2-methylpentanoate 在 4-二甲氨基吡啶 、 正丁基锂 、 N-甲基吲哚酮 、 四丙基高钌酸铵 、 amberlyst-15 、 四丁基氟化铵 、 水 、 二异丁基氢化铝 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、 溶剂黄146 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 N,N-二异丙基乙胺 、 三氟乙酸 、 lithium chloride 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 、 乙腈 为溶剂， 反应 93.5h， 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：

  (S)-methyl 5-(benzyloxy)-3-hydroxypentanoate 在 palladium on activated charcoal 咪唑 、 氢气 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 六甲基磷酰三胺 、 N,N-二甲基甲酰胺 为溶剂， 反应 17.0h， 生成 methyl (2S,3S)-3,5-bis[(tert-butyldimethylsilyl)oxy]-2-methylpentanoate
  参考文献：
  名称：

  Formal syntheses of cryptophycin A and arenastatin A

  摘要：

  Efficient formal syntheses of the tubulin binding antitumor agents cryptophycin A (1) and arenastatin A (2) are detailed. The readily available beta-keto ester 4 was subjected to catalytic asymmetric hydrogenation, Frater alkylation, and selective functional group transformations to provide the silyl ether of octanoic acid methyl ester 3, which is the key intermediate for the formal syntheses of the title compounds. (C) 1997 Elsevier Science Ltd.

  DOI：

  10.1016/s0040-4039(97)00194-9

文献信息

• Formal syntheses of cryptophycin A and arenastatin A
  作者：Syed M. Ali、Gunda I. Georg

  DOI：10.1016/s0040-4039(97)00194-9

  日期：1997.3

  Efficient formal syntheses of the tubulin binding antitumor agents cryptophycin A (1) and arenastatin A (2) are detailed. The readily available beta-keto ester 4 was subjected to catalytic asymmetric hydrogenation, Frater alkylation, and selective functional group transformations to provide the silyl ether of octanoic acid methyl ester 3, which is the key intermediate for the formal syntheses of the title compounds. (C) 1997 Elsevier Science Ltd.
• 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).