methyl 4-acetoxybut-2-ynoate | 68691-05-4

• 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 4-acetoxybut-2-ynoate
• 英文别名: Methyl-4-Acetoxytetrolat；Methyl 4-(acetyloxy)but-2-ynoate；methyl 4-acetyloxybut-2-ynoate
• CAS: 68691-05-4
• 化学式: C₇H₈O₄
• 分子量: 156.138
• InChiKey: SKQIZGPOLJHFGL-UHFFFAOYSA-N

物化性质

• 沸点：
  237.0±23.0 °C(Predicted)
• 密度：
  1.162±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.4
• 重原子数：
  11
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  methyl 4-acetoxybut-2-ynoate 在 氢气 作用下， 以 环己烷 、 甲苯 为溶剂， 反应 3.0h， 以30%的产率得到(Z)-methyl 4-acetoxybut-2-enoate
  参考文献：
  名称：

  Determination of the absolute configuration of two α v β 6 integrin inhibitors for the treatment of idiopathic pulmonary fibrosis and investigations on the asymmetric 1,4-addition of arylboronic acids to crotonate esters bearing a C4-oxygen substituent

  摘要：

  The absolute configuration of two novel alpha(v)beta(6) integrin inhibitors was established via degradation to the corresponding C3-aryl substituted butyrolactone. The configuration of the resulting lactones was established by asymmetric synthesis using 1,4-addition of arylboronic acids to butenolide, catalysed by bis (norbornadiene)rhodium (I) tetrafluoroborate in the presence of (R)-BINAP, and confirmed by X-ray crystallography. Studies on arylboronic acid conjugate additions to acyclic crotonate esters bearing a gamma-oxygen substituent are also reported. Three Rh catalysts were investigated and the one giving the highest enantioselectivity was bis(norbornadiene)rhodium (I) tetrafluoroborate. (C) 2017 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2017.08.017
• 作为产物：
  描述：

  methyl 4-tetrahydropyranyloxy-2-butinoate 在 4-二甲氨基吡啶 、 对甲苯磺酸 、 三乙胺 作用下， 以 甲醇 、 二氯甲烷 、 水 为溶剂， 反应 37.5h， 生成 methyl 4-acetoxybut-2-ynoate
  参考文献：
  名称：

  铂催化内部炔烃的氢甲硅烷基化：利用取代基效应实现高区域选择性

  摘要：

  经验法则：描述高产率标题反应的重点是理解控制该过程的区域选择性的因素（请参阅方案）。电子，空间和官能团的性质都影响选择性，对它的理解允许选择性地形成三取代的乙烯基硅烷，这是用于合成立体确定的烯烃的合成上有用的化合物。

  DOI：

  10.1002/anie.201108714

文献信息

• An analysis of the influences dictating regioselectivity in platinum-catalyzed hydrosilylations of internal alkynes
  作者：Douglas A. Rooke、Zachary A. Menard、Eric M. Ferreira

  DOI：10.1016/j.tet.2014.03.012

  日期：2014.7

  A full account of our studies on internal alkyne hydrosilylations using platinum catalysis is described. We demonstrate that these transformations are highly governed by the electronic characteristics of the alkyne substituents, wherein the hydride will add preferentially to the more electron-deficient alkyne carbon. The steric and coordinative capabilities of the substituents influence the selectivity

  完整介绍了我们对使用铂催化的内部炔烃氢甲硅烷基化的研究。我们证明，这些转变高度受炔烃取代基的电子特性支配，其中氢化物将优先添加至电子欠缺的炔烃碳上。取代基的空间和配位能力对选择性的影响程度要小得多，其中丙炔醇是唯一的例外。硅烷的选择在某些情况下是相关的。特定的硅烷将提供较高的区域选择性，而其他的则选择性要低得多。最终，使用13 C NMR化学位移数据可以完全预测加成的区域选择性，从而将这种反应性纳入目标反应设计中。
• Pd-Catalyzed Sulfinylzincation of Activated Alkynes with 1-Alkynyl Sulfoxides as a Sulfinyl Source
  作者：Naoyoshi Maezaki、Suguru Yagi、Ryoko Yoshigami、Jun Maeda、Tomoko Suzuki、Shizuka Ohsawa、Kouji Tsukamoto、Tetsuaki Tanaka

  DOI：10.1021/jo034108j

  日期：2003.7.1

  with 1-alkynyl sulfoxide as a sulfinyl source was developed. Bis-sulfinyl alkenes were formed in good yields on treatment of 1-alkynyl sulfoxides with Et(2)Zn in the presence of a Pd-catalyst, wherein zinc sulfenate (or sulfinylzinc) species would be generated in situ to undergo highly syn-selective conjugate addition to the 1-alkynyl sulfoxides. By using 3,3-dimethyl-1-butynyl sulfoxides, formation of

  开发了前所未有的Pd催化的亚砜基1-炔基亚砜催化的亚磺酰基锌化反应。在Pd催化剂存在下，用Et（2）Zn处理1-炔基亚砜时，高产率地形成了双亚磺酰基烯烃，其中，亚硫酸锌（或亚磺酰基锌）物质将在原位生成，以进行高度同位选择性共轭加成至1-炔基亚砜。通过使用3，3-二甲基-1-丁炔基亚砜，完全抑制了双亚磺酰基烯烃的形成，并且实现了活化炔烃的亚磺酰基锌化。该反应耐受各种功能，并且由于炔烃的δ位处杂原子的相邻基团的参与而大大促进了该反应。
• Reactivity of malonyl radicals. Synthesis of substituted dihydronaphthalenes by manganese(III) oxidation of diethyl .alpha.-benzylmalonate in the presence of alkynes
  作者：Roberto Santi、Fabrizio Bergamini、Attilio Citterio、Roberto Sebastiano、Marco Nicolini

  DOI：10.1021/jo00041a034

  日期：1992.7

  Oxidation of diethyl alpha-benzylmalonate (1) by Mn(III) acetate in acetic acid at 70-degrees-C in the presence of alkynes 2a-j leads to dihydronaphthalene derivatives 3a-j in moderate to good yields. A homolytic mechanism, involving oxidation of 1 to the corresponding malonyl radical, its addition to a triple bond, and intramolecular homolytic aromatic substitution of the vinyl radical adducts, is suggested. Propargylic hydrogen abstraction and dimerization at the malonic position for less reactive alkynes are the main side reactions observed. Relative and absolute rates of addition of alpha-benzylmalonyl radicals to representative alkynes and alkenes, deduced from competitive experiments, indicate a lower reactivity toward alkynes than toward the corresponding substituted alkenes. Both SOMO-LUMO and SOMO-HOMO interactions in the transition state lower the activation energy of these homolytic additions with alkenes, but only the SOMO-HOMO interaction dominates with the examined alkynes. 2-Naphthoic acid derivatives can be efficiently obtained by oxidative decarboxylation of 3 with NaI and air.
• Synthesis of chiral vinylic sulfoxides by Pd-catalyzed asymmetric sulfinylzincation
  作者：Naoyoshi Maezaki、Suguru Yagi、Shizuka Ohsawa、Hirofumi Ohishi、Tetsuaki Tanaka

  DOI：10.1016/j.tet.2003.10.037

  日期：2003.12

  Novel asymmetric sulfinylzincation of alkynoates has been accomplished via a Pd-catalyzed sulfinylzincation using 1-alkynyl sulfoxides bearing chiral auxiliaries as a sulfinylating reagent. The reaction proceeded in a highly syn-selective fashion, giving the (E)-beta-sulfinyl alpha,beta-unsaturated ester exclusively. Among the chiral sulfinylating reagents tested, an isoborneol-type compound (Rs)-4 showed the best results in terms of both yield and diastereoselectivity. As a result of optimization of the reaction, the selectivity was improved up to 92:8 dr, and stereochemistry of the newly formed sulfur stereogenic center was revealed as (Ss)-configuration. (C) 2003 Elsevier Ltd. All rights reserved.
• Maezaki, Naoyoshi; Yagi, Suguru; Ohsawa, Shizuka, Tetrahedron Asymmetry, 2002, vol. 13, # 18, p. 1960 - 1964
  作者：Maezaki, Naoyoshi、Yagi, Suguru、Ohsawa, Shizuka、Ohishi, Hirofumi、Tanaka, Tetsuaki

  DOI：——

  日期：——