tert-butyl (2E,5S,6R,7E)-5-[(tert-butyldimethylsilyl)-oxy]-6-methyl-8-phenylocta-2,7-dienoate | 219606-79-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: tert-butyl (2E,5S,6R,7E)-5-[(tert-butyldimethylsilyl)-oxy]-6-methyl-8-phenylocta-2,7-dienoate
• 英文别名: tert-Butyl (2E,5S,6R,7E)-5-[(tert-butyl-dimethylsilyl)-oxy]-6-methyl-8-phenyl-octa-2,7-dienoate；tert-butyl (2E,5S,6R,7E)-5-[tert-butyl(dimethyl)silyl]oxy-6-methyl-8-phenylocta-2,7-dienoate
• CAS: 219606-79-8
• 化学式: C₂₅H₄₀O₃Si
• 分子量: 416.676
• InChiKey: JDLIVAXHJOUPDF-PWPDURNWSA-N

物化性质

• 沸点：
  472.6±45.0 °C(Predicted)
• 密度：
  0.958±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  7.01
• 重原子数：
  29
• 可旋转键数：
  11
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  tert-butyl (2E,5S,6R,7E)-5-[(tert-butyldimethylsilyl)-oxy]-6-methyl-8-phenylocta-2,7-dienoate 在 4-二甲氨基吡啶 、 amberlyst-15 、 四丁基氟化铵 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、 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 7.25h， 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 palladium diacetate 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 三乙胺 、 lithium chloride 作用下， 以 乙腈 为溶剂， 反应 26.5h， 生成 tert-butyl (2E,5S,6R,7E)-5-[(tert-butyldimethylsilyl)-oxy]-6-methyl-8-phenylocta-2,7-dienoate
  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 3
  作者：Paulami Danner、Matthias Bauer、Prodeep Phukan、Martin�E. Maier

  DOI：10.1002/ejoc.200400558

  日期：2005.1

  which contains fragments D and C. After extension at the carboxyl function by esterification with the hydroxy ester 10, the seco compounds 37 and 42 were obtained. Ring closure was achieved by macrolactamization in the presence of TBTU as condensing agent. This work features a streamlined synthesis of the hydroxy ester 10, a short synthesis of the amino acid 14 by enantioselective alkylation of the

  缩肽隐藻素 3 (5) 和隐藻素类似物 43 由相应的四个亚基制备。三肽类似物34从起始氨基酯33获得，其包含片段D和C。通过与羟基酯10酯化在羧基官能团处延伸后，获得seco化合物37和42。在作为缩合剂的 TBTU 存在下，通过大环内酰胺化实现闭环。这项工作的特点是简化了羟基酯 10 的合成，通过甘氨酸亚胺 21 的对映选择性烷基化快速合成了氨基酸 14，以及使用 Fmoc 保护基团保护氨基功能。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
• Synthesis and Cytotoxicity Studies of New Cryptophycin Analogues
  作者：Wen Lu Liu、Jian Cun Zhang、Fa Qin Jiang、Lei Fu

  DOI：10.1002/ardp.200900067

  日期：2009.10

  Two analogues of cryptophycin were synthesized and biologically evaluated for their in‐vitro cytotoxicities against several solid tumors and leukemia cell lines. The results revealed that both analogues exhibited a broad range of cytotoxic activity with observed IC50 values in the μM‐range, and compound 4 was more effective than compound 3 in most assays studied.

  合成了两种隐藻素类似物，并对其对几种实体瘤和白血病细胞系的体外细胞毒性进行了生物学评估。结果表明，两种类似物都表现出广泛的细胞毒活性，观察到的 IC50 值在 μM 范围内，在大多数研究中，化合物 4 比化合物 3 更有效。
• MACROCYCLIZATION OF COMPOUNDS FROM SOLID SUPPORT USING THIOESTERASES
  申请人：Sherman David H.

  公开号：US20090111152A1

  公开（公告）日：2009-04-30

  A method of preparing macrocycles using solid support chemistry and thioesterases is disclosed. Also disclosed are novel macrocycles.

  本发明公开了一种使用固相支持化学和硫酯酶制备大环化合物的方法。同时还公开了新型大环化合物。
• A concise synthesis of the cytotoxic depsipeptide arenastatin A
  作者：James D. White、Jian Hong、Lonnie A. Robarge

  DOI：10.1016/s0040-4039(98)02014-0

  日期：1998.11

  Arenastatin A (1, cryptophycin 24) was synthesized by convergence of hydroxy eater 16 with amino acid derivative 27; two independent and highly efficient routes to 16 are disclosed. (C) 1998 Elsevier Science Ltd. All rights reserved.
• Total Synthesis of Cryptophycins-1, -3, -4, -24 (Arenastatin A), and -29, Cytotoxic Depsipeptides from Cyanobacteria of the Nostocaceae
  作者：James D. White、Jian Hong、Lonnie A. Robarge

  DOI：10.1021/jo9907585

  日期：1999.8.1

  A convergent synthesis of cryptophycins has been developed in which (5S,GR)-5-hydroxy-6-methyl-8-phenylocta-2(E),7(E)-dienoic add (A) is coupled with an amino acid. segment (B). Two stereoselective routes to A are described, the first employing allylation of an alpha-homochiral aldehyde and the second using asymmetric crotylation of an achiral aldehyde to establish the two stereogenic centers present in a. The styryl moiety of A was attached either via Stille coupling or through a Wadsworth-Emmons condensation with diethyl benzylphosphonate. The amino acid subunit B was prepared from benzyl (2S)-2-hydroxyisocaproate by connection first to N-Boc-beta-alanine or its (2R)-methyl-substituted derivative and then to (2R)-N-Boc-O-methyltyrosine or its nt-chloro derivative. Fusion of the A and B subunits was accomplished by initial esterification of the former with the latter, followed by macrocyclization using diphenyl phosphorazidate. In this way, cryptophycin-3, -4, and -29 were obtained along with the nonnatural cyclic depsipeptide 52. Epoxidation of cryptophycin-3 with dimethyldioxirane gave cryptophycin-1; analogous epoxidation of 52 afforded arenastatin A (cryptophycin-24).