(4R)-5-(tert-butyldiphenylsilyloxy)-4-methyl-1-pentene | 144693-95-8

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: (4R)-5-(tert-butyldiphenylsilyloxy)-4-methyl-1-pentene
• 英文别名: (R)-tert-Butyldiphenylsilyl 2-methyl-4-pentenyl ether；tert-butyl-[(2R)-2-methylpent-4-enoxy]-diphenylsilane
• CAS: 144693-95-8
• 化学式: C₂₂H₃₀OSi
• 分子量: 338.565
• InChiKey: HACMKFYXTRPWQR-LJQANCHMSA-N

物化性质

• 沸点：
  384.4±25.0 °C(Predicted)
• 密度：
  0.96±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.78
• 重原子数：
  24
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (4R)-5-(tert-butyldiphenylsilyloxy)-4-methyl-1-pentene 在 sodium perborate tetrahydrate 、 palladium 10% on activated carbon 、 四丁基氟化铵 、 氢气 、 氧气 、 sodium hydride 、 戴斯-马丁氧化剂 、 copper(II) sulfate 、 间氯过氧苯甲酸 、 三苯基膦 、 lithium hexamethyldisilazane 、 肼 、 偶氮二甲酸二乙酯 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 、 水 、 乙酸乙酯 为溶剂， 反应 21.17h， 生成 (4S,8S,12S,16S,20S)-4,8,12,16,20-pentamethyl-1-heptacosanol
  参考文献：
  名称：

  Highly Stereocontrolled Total Synthesis of β-d-Mannosyl Phosphomycoketide: A Natural Product from Mycobacterium tuberculosis

  摘要：

  beta-D-Mannosyl phosphomycoketide (C-32-MPM), a naturally occurring glycolipid found in the cell walls of Mycobacterium tuberculosis, acts as a potent antigen to activate T-cells upon presentation by CD1c protein. The lipid portion of C-32-MPM contains, a C-32-mycoketide, consisting of a saturated oligoisoprenoid chain with five chiral methyl branches. Here we develop several stereocontrolled approaches to assemble the oligoisoprenoid chain with high stereopurity (>96%) using Julia-Kocienski olefinations followed by diimide reduction. By careful choice of olefination sites, we could derive all chirality from a single commercial compound, methyl (2S)-3-hydroxy-2-methylpropionate (>99% ee). Our approach is the first highly stereocontrolled method to prepare C-32-MPM molecule with >96% stereopurity from a single >99% ee starting material. We anticipate that our methods will facilitate the highly stereocontrolled synthesis of a variety of other natural products containing chiral oligoisoprenoid-like chains, including vitamins, phytol, insect pheromones, and archaeal lipids.

  DOI：

  10.1021/jo4006602
• 作为产物：
  描述：

  3-(tert-butyldiphenylsilyloxy)prop-1-ene 在 (-)-(NMI)2ZrCl₂ 、 水 作用下， 以 二氯甲烷 为溶剂， 反应 27.0h， 生成 (4R)-5-(tert-butyldiphenylsilyloxy)-4-methyl-1-pentene
  参考文献：
  名称：

  通过 Zr 催化烯丙醇的不对称碳铝化反应，催化、高效、同步选择性地构建脱氧聚丙酸酯和其他手性化合物

  摘要：

  开发了一种通过 Zr 催化的不对称碳铝化（ZACA 反应）合成 alpha,omega-diheterofunctional deoxypolypropionates 的高效、顺式选择性、全催化不对称协议。该方法的成功关键取决于将未保护的烯丙醇一锅法转化为 TBS 保护的 (R)-或 (S)-3-iodo-2-methyl-1-propanol (1)，对映体纯度为 91%通过 (i) Zr 催化的不对称甲基铝化、(ii) 碘化和 (iii) 用 TBSCl 保护，产率为 82%。1 锌化后，其 Pd 催化与各种有机卤化物的交叉偶联可以得到各种有机衍生物，包括 3 和 4，它们可以作为高效和选择性合成脱氧聚丙酸酯的关键中间体，如多利库利和 2,4,6 ,8-四甲基癸酸和其他手性化合物，1,4-戊二烯（5 当量）的选择性单碳铝化，氧化后得到预期产物 5，但 ee 为 0%。已经提出并实验支持外消旋化的合理机制。

  DOI：

  10.1021/ja0530974

文献信息

• A smooth rearrangement of N-p-toluenesulfonyl 2-tert-butyldiphenylsilylmethyl-substituted azetidines into N-p-toluenesulfonyl 3-tert-butyldiphenylsilyl-substituted pyrrolidines
  作者：Bharat D. Narhe、Vardhineedi Sriramurthy、Veejendra K. Yadav

  DOI：10.1039/c2ob07140a

  日期：——

  The rearrangement of N-p-toluenesulfonyl 2-tert-butyldiphenylsilylmethyl-substituted azetidines into 3-tert-butyldiphenylsilyl-substituted pyrrolidines under Lewis acid conditions in dichloromethane involves 1,2-migration of silicon through a siliranium ion. The formation of siliranium ion was discovered not to be in concert with σC–N cleavage from stereochemical analysis of the pyrrolidine products formed from 3- and 4-substituted-2-tert-butyldiphenylsilylmethyl azetidines and also from the optical rotation data and chiral HPLC analysis of the pyrrolidine product formed from N-p-toluenesulfonyl 2(R)-tert-butyldiphenylsilylmethyl azetidine. The formation of sterically less hindered siliranium ion is followed by its SN2 opening by the internal nitrogen nucleophile. Oxidative cleavage of σC–Si bond leads to the formation of 3-hydroxypyrrolidines.

  在二氯甲烷的刘易斯酸条件下，N-对甲苯磺酰基2-叔丁基二苯基硅甲基取代的氮杂环丁烷被重新排列为3-叔丁基二苯基硅基取代的吡咯烷，其中硅通过硅化铵离子发生1,2-迁移。通过对3-和4-取代-2-叔丁基二苯基硅甲基氮杂环丁烷形成的吡咯烷产物进行立体化学分析，以及通过对N-对甲苯磺酰基2(R)-叔丁基二苯基硅甲基氮杂环丁烷形成的吡咯烷产物进行旋光数据和手性高效液相色谱分析，发现硅化铵离子的形成与σC-N断裂并不一致。空间位阻较小的硅化铵离子形成后，内部氮亲核试剂会对其进行SN2开环。σC-Si键的氧化断裂会导致3-羟基吡咯烷的形成。
• Synthesis of Proposed Aglycone of Mandelalide A
  作者：Karla Mahender Reddy、Vanipenta Yamini、Kiran K. Singarapu、Subhash Ghosh

  DOI：10.1021/ol500875e

  日期：2014.5.16

  A highly convergent synthesis of the proposed mandelalide A aglycone is reported. The cornerstones of the synthetic strategy include the following: E-selective intramolecular Heck cyclization, Masamune–Roush olefination, Stork–Zhao–Wittig olefination, modified Prins cyclization; Sharpless asymmetric dihydroxylation followed by Williamson-type etherification, Julia–Kocienski olefination, Brown crotylation

  据报道，拟议的扁桃苷A糖苷配基的高度收敛合成。合成策略的基础包括：E选择性分子内Heck环化，Masamune–Roush烯烃化，Stork–Zhao–Wittig烯烃化，修饰的Prins环化；尖锐的不对称二羟基化反应，接着是Williamson型醚化反应，Julia-Kocienski烯烃化反应，Brown crotylation和Brown烯丙基化反应。
• Formal total synthesis of mandelalide A
  作者：V Yamini、K Mahender Reddy、A Shiva Krishna、J K Lakshmi、Subhash Ghosh

  DOI：10.1007/s12039-019-1600-2

  日期：2019.3

  AbstractIn this article the formal total synthesis of mandelalide A has been described in details. The highly convergent and flexible strategy developed for mandelalide A involved the construction of key building blocks ent-9 and 7, and their assembly to the target compound. For the synthesis and coupling of these building blocks, the Brown’s crotylation, Sharpless asymmetric dihydroxylation followed

  摘要在本文中，已详细描述了扁桃烯化物A的正式全合成。为曼荼罗胺A开发的高度融合和灵活的策略涉及关键关键模块ent - 9和7的构建，以及它们与目标化合物的组装。对于这些结构单元的合成和偶联，先进行布朗的crotylation，Sharpless不对称二羟基化，然后进行原位 采用Williamson型醚化，修饰的Prins环化，Masamune-Roush烯烃化和Heck环化，后者对于曼荼罗A的大环的高立体选择性形成至关重要。提出的扁桃苷A结构的糖苷配基是不成功的，发现是不成功的。 图形概要高度融合和灵活的策略已发展为一个mandelalide通过两个积木耦合耳鼻喉科-9和7至正宗-劳什烯随后分子哎呀环。
• Tandem Macrolactone Synthesis: Total Synthesis of (−)‐Exiguolide by a Macrocyclization/Transannular Pyran Cyclization Strategy
  作者：Daichi Mizukami、Kei Iio、Mami Oda、Yu Onodera、Haruhiko Fuwa

  DOI：10.1002/anie.202202549

  日期：2022.5.23

  to access tetrahydropyran-containing macrolactones in a single step from readily available linear precursors. To illustrate the feasibility of the synthetic strategy, an antitumor marine macrolide, (−)-exiguolide, was synthesized in just 13 steps from a commercially available compound.

  开发了一种集成了 Meyer-Schuster 重排、大环闭环复分解和跨环 oxa-Michael 加成的催化串联反应，可从现成的线性前体一步获得含四氢吡喃的大环内酯。为了说明该合成策略的可行性，一种抗肿瘤海洋大环内酯类 (-)-exiguolide 由市售化合物仅用 13 个步骤合成。
• (−)-Lytophilippine A: Synthesis of a C1−C18 Building Block
  作者：Annika Gille、Martin Hiersemann

  DOI：10.1021/ol1023008

  日期：2010.11.19

  The convergent enantioselective synthesis of a protected C1-C18 building block for the total synthesis of (-)-lytophilippine A was achieved. A catalytic asymmetric Gosteli-Claisen rearrangement and an Evans aldol reaction served as key C/C-connecting transformations during the assembling of the C1-C7 subunit (10 steps from 4, 29%). The synthesis of the C8-C18 segment was achieved utilizing D-galactose as inexpensive ex-chiral-pool starting material (15 steps, 15%). The merger of the subunits was accomplished by a remarkably efficient sequence consisting of esterification and ring-closing metathesis (five steps, 56%).