(2E,7E)-(5S,6R)-5-Hydroxy-6-methyl-8-phenyl-octa-2,7-dienoic acid tert-butyl ester

• 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: (2E,7E)-(5S,6R)-5-Hydroxy-6-methyl-8-phenyl-octa-2,7-dienoic acid tert-butyl ester
• 英文别名: tert-butyl (2E,5S,6R,7E)-5-hydroxy-6-methyl-8-phenylocta-2,7-dienoate
• 化学式: C₁₉H₂₆O₃
• 分子量: 302.414
• InChiKey: BSWULDQSXUCRHI-KUOCDUKZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  22
• 可旋转键数：
  8
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.42
• 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：

  (2E,7E)-(5S,6R)-5-Hydroxy-6-methyl-8-phenyl-octa-2,7-dienoic acid tert-butyl ester 在 4-二甲氨基吡啶 、 叠氮磷酸二苯酯 、 碳酸氢钠 、 N,N'-二异丙基碳二亚胺 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 90.0h， 生成 desepoxyarenastatin A
  参考文献：
  名称：

  Total Synthesis of Cryptophycins-1, -3, -4, -24 (Arenastatin A), and -29, Cytotoxic Depsipeptides from Cyanobacteria of the Nostocaceae

  摘要：

  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).

  DOI：

  10.1021/jo9907585
• 作为产物：
  描述：

  (E)-methyl 4-phenylbut-3-enoate 在 lead 、 sodium azide 、 phosphate buffer 、 碘 、 二异丁基氢化铝 、 potassium carbonate 、 三苯基膦 、 锌 、 lithium diisopropyl amide 、 偶氮二甲酸二乙酯 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 正己烷 、 水 、 苯 为溶剂， 反应 174.42h， 生成 (2E,7E)-(5S,6R)-5-Hydroxy-6-methyl-8-phenyl-octa-2,7-dienoic acid tert-butyl ester
  参考文献：
  名称：

  Total Synthesis of Cryptophycins via a Chemoenzymatic Approach

  摘要：

  A highly convergent synthesis of cryptophycins in their enantiomerically-pure forms was achieved. Our strategy consists of the synthesis of the two units 3 and 4 and linking them together to form the macrocyclic ring. The upper unit 3 was prepared from 10 in four steps, and the lower unit 4 was prepared from 20 in three steps. Enantioselective biocatalytic methodology was used to prepare the requisite chiral building blocks, (R)-11 and (R)-19. The stereochemical versatility of this synthetic approach is demonstrated by the synthesis of cryptophycin A and the four diastereomers of cryptophycin C.

  DOI：

  10.1021/jo960972i

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。
• Synthesis of Cryptophycins via an <i>N</i>-Acyl-β-lactam Macrolactonization
  作者：Ramdas Vidya、MariJean Eggen、Sajiv K. Nair、Gunda I. Georg、Richard H. Himes

  DOI：10.1021/jo0302197

  日期：2003.12.1

  to the synthesis of the macrolide core of the cryptophycins has been developed. A novel macrolactonization utilizing a reactive acyl-beta-lactam intermediate incorporates the beta-amino acid moiety within the 16-membered macrolide core. This modular approach, involving a cyanide-initiated acyl-beta-lactam ring opening followed by cyclization, was successfully applied to the total synthesis of cryptophycin-24

  已经开发了一种高效简明的隐藻毒素大环内酯核心合成方法。利用反应性酰基-β-内酰胺中间体的新型大环内酯化在16元大环内酯核心内结合了β-氨基酸部分。这种涉及氰化物引发的酰基-β-内酰胺开环并随后环化的模块化方法已成功应用于隐藻素-24的全合成。该策略还用于有效合成6,6-二甲基取代的脱氯隐霉素52。在这种情况下，通过催化过程实现了双取代的2-氮杂环丁酮的氰化物引发的开环，随后进行大内酯化。
• 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).