(2R,4S)-5-(benzyloxy)-2,4-dimethylpentan-1-ol | 169105-67-3

• 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: (2R,4S)-5-(benzyloxy)-2,4-dimethylpentan-1-ol
• 英文别名: (2R,4S)-2,4-dimethyl-5-phenylmethoxypentan-1-ol
• CAS: 169105-67-3
• 化学式: C₁₄H₂₂O₂
• 分子量: 222.327
• InChiKey: URWKTSZIEPWOLR-OLZOCXBDSA-N

物化性质

• 沸点：
  318.0±25.0 °C(predicted)
• 密度：
  0.984±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  16
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (2R,4S)-5-(benzyloxy)-2,4-dimethylpentan-1-ol 在 咪唑 、 碘 、 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 以91%的产率得到((((2S,4R)-5-iodo-2,4-dimethylpentyl)oxy)methyl)benzene
  参考文献：
  名称：

  鲍拉霉素及其类似物的转移全合成揭示了替代作用机制

  摘要：

  鲍拉霉素被鉴定为体外铁载体生物合成抑制剂。采用转向全合成来构建天然产物和八种战略类似物，其中三种具有改善的抑制活性。生物学测试表明，膜损伤是金黄色葡萄球菌细胞的主要作用模式。

  DOI：

  10.1021/acs.orglett.8b00054
• 作为产物：
  描述：

  (4S,2'R)-3-(3'-(benzyloxy)-2'-methylpropanoyl)-4-benzyl-1,3-oxazolidin-2-one 在 咪唑 、 锂硼氢 、 正丁基锂 、 硼烷铵络合物 、 碘 、 二异丙胺 、 三苯基膦 、 lithium chloride 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 、 二氯甲烷 为溶剂， 反应 7.33h， 生成 (2R,4S)-5-(benzyloxy)-2,4-dimethylpentan-1-ol
  参考文献：
  名称：

  Mechanism and Stereospecificity of a Fully Saturating Polyketide Synthase Module: Nanchangmycin Synthase Module 2 and Its Dehydratase Domain

  摘要：

  Recombinant nanchangmycin synthase module 2 (NANS module 2), with the thioesterase domain from the 6-deoxyerythronolide B synthase (DEBS TE) appended to the C-terminus, was cloned and expressed in Escherichia coli. Incubation of NANS module 2+TE with (+/-)-2-methyl-3-keto-butyryl-N-acetylcysteamine thioester (1), the SNAC analog of the natural ACP-bound substrate, with methylmalonyl-CoA (MM-CoA) in the absence of NADPH gave 3,5,6-trimethy1-4-hydroxypyrone (2), identified by direct comparison with synthetic 2 by radio-TLC-phosphorimaging and LC-ESI(+)-MS-MS. The reaction showed K(cat) 0.5 +/- 0.1 min(-1) and K(m)(1) 19 +/- 5 mM at 0.5 mM MM-CoA and k(cat)(app) 0.26 +/- 0.02 min(-1) and K(m)(MM-CoA) 0.11 +/- 0.02 mM at 8 mM 1. Incubation in the presence of NADPH generated the fully saturated triketide chain elongation product as a 5:3 mixture of (2S,4R)-2,4-dimethy1-5-ketohexanoic acid (3a) and the diastereomeric (2S, 4S)-3b. The structure and stereochemistry of each product was established by comparison with synthetic 3a and 3b by a combination of radio-TLC-phosphorimaging and LC-ESI(-)-MS-MS, as well as chiral capillary GC-MS analysis of the corresponding methyl esters 3a-Me and 3b-Me. The recombinant dehydratase domain from NANS module 2, NANS DH2, was shown to catalyze the formation of an (E)-double bond by syndehydration of the ACP-bound substrate anti-(2R,3R,4S,5R)-2,4-dimethyl-3,5-dihydroxyheptanoyl-ACP6 (4), generated in situ by incubation of (2S,3R)-2-methyl-3-hydroxypentanoyl-SNAC (5), methylmalonyl-CoA, and NADPH with the recombinant [KS6][AT6] didomain and ACP6 from DEBS module 6 along with the ketoreductase from the tylactone synthase module 1 (TYLS KR1). These results also indirectly establish the stereochemistry of the reactions catalyzed by the KR and enoylreductase (ER) domains of NANS module 2.

  DOI：

  10.1021/ja1073432

文献信息

• Total Synthesis of Rapamycin
  作者：Steven V. Ley、Miles N. Tackett、Matthew L. Maddess、James C. Anderson、Paul E. Brennan、Michael W. Cappi、Jag P. Heer、Céline Helgen、Masakuni Kori、Cyrille Kouklovsky、Stephen P. Marsden、Joanne Norman、David P. Osborn、María Á. Palomero、John B. J. Pavey、Catherine Pinel、Lesley A. Robinson、Jürgen Schnaubelt、James S. Scott、Christopher D. Spilling、Hidenori Watanabe、Kieron E. Wesson、Michael C. Willis

  DOI：10.1002/chem.200801656

  日期：2009.3.9

  Rapamycin (1) is a macrocyclic natural product, established as a potent immunosuppressant and currently of interest to the scientific community as the framework for a series of novel anticancer drugs. Extensive studies have culminated in a new convergent total synthesis of 1, which features a number of group‐derived methodologies and an unusual catechol‐templating strategy for the construction of the

  雷帕霉素（1）是一种大环天然产物，已被确立为有效的免疫抑制剂，目前作为一系列新型抗癌药物的框架引起了科学界的关注。广泛的研究最终得出了新的1的收敛全合成，该合成具有许多基于组的方法和一种异常的邻苯二酚模板化策略，用于构建具有挑战性的大环核。
• Synthesis of (+)-siphonarienone: Asymmetric alkylation using a chiral benzopyrano-isoxazolidine auxiliary
  作者：Atsushi Abiko、Satoru Masamune

  DOI：10.1016/0040-4039(95)02353-4

  日期：1996.2

  Asymmetric alkylation of the potassium enolates derived from N-propionyl benzopyrano-[4,3-c]-isoxazolidine derivatives with chiral alkyl triflates proceeded smoothly with high diastereoselectivity. The stereochemistry of the newly formed stereogenic center was fully controlled by the facial selectivity of the enolate according to the rule of double asymmetric synthesis. The application of this methodology

  N-丙酰基苯并吡喃基-[4,3-c]-异恶唑烷衍生物衍生的烯醇钾与手性烷基三氟甲磺酸酯的不对称烷基化以高非对映选择性顺利进行。根据双不对称合成的规则，新形成的立体异构中心的立体化学完全受烯醇化物的面部选择性控制。这种方法学的应用导致了海洋聚丙烯酸酯天然产物（+）-siphonarienoneone的首次合成。
• Highly Stereoselective Total Synthesis of (+)-9-epi-Dictyostatin and (-)-12,13-Bis-epi-dictyostatin
  作者：Chiara Zanato、Luca Pignataro、Andrea Ambrosi、Zhongyan Hao、Chiara Trigili、José Fernando Díaz、Isabel Barasoain、Cesare Gennari

  DOI：10.1002/ejoc.201100244

  日期：2011.5

  The final key steps to these unnatural products were the addition of vinylzincates C10-C26 to aldehyde C1―C9 (leading surprisingly to complete stereoselectivity for the 9R-configuration in 28a and for the 9S-configuration in 12,13-bis-epimeric 28b), followed by Yamaguchi macrolactonization and global deprotection. (―)-12,13-Bis-epi-dictyostatin (1b) displayed a dramatic decrease of cytotoxicity and of

  (+)-9-epi-dictyostatin (1a) 和 (-)-12,13-bis-epi-dictyostatin (1b) 的全合成，抗有丝海绵衍生的大环内酯 (-)-dictyostatin 的非对映异构体 (1) )，是通过创建 11 个立体中心和 4 个立体双键实现的，具有高水平的立体控制。来自罗氏酯的 29 步最长线性序列的产率分别为 1.53% 和 1.52%。这些非天然产物的最后关键步骤是将乙烯基锌酸盐 C10-C26 添加到醛 C1-C9（令人惊讶地导致 28a 中的 9R-构型和 12,13-双-差向异构体 28b 中的 9S-构型具有完全立体选择性） ，其次是 Yamaguchi 大环内酯化和全局脱保护。(―)-12,
• A highly stereoselective synthesis of the C10–C23 fragment of (–)-dictyostatin
  作者：Chiara Monti、Ofer Sharon、Cesare Gennari

  DOI：10.1039/b708820e

  日期：——

  A highly stereoselective synthesis of the C10-C23 fragment of (-)-dictyostatin has been achieved using a Carreira alkynylation and a Marshall-Tamaru allenylzinc addition as key steps.

  使用Carreira炔基化和Marshall-Tamaru烯基锌的添加作为关键步骤，已经实现了（-）-dictyostatin C10-C23片段的高度立体选择性合成。
• Synthetic Studies on Borrelidin:  Enantioselective Synthesis of the C1−C12 Fragment
  作者：Binh G. Vong、Sunny Abraham、Alan X. Xiang、Emmanuel A. Theodorakis

  DOI：10.1021/ol034243i

  日期：2003.5.1

  [structure: see text] An efficient, enantioselective synthesis of the C1-C12 fragment 2 of borrelidin is presented. Construction of the "skipped" polymethylene chain of 2 was accomplished by iteration of Myers' alkylation, while formation of the C3 stereocenter was achieved by Roush's asymmetric allylboration methodology.

  [结构：见正文]提出了一种有效的对映体合成硼瑞林定的C1-C12片段2的方法。通过迈尔斯的烷基化反应完成“跳过”的2亚甲基链的构建，而C3立体中心的形成则通过Roush的不对称烯丙基硼化方法完成。