rac-ethyl 3-hydroxy-5-phenylpent-4-ynoate | 175410-79-4

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羟基酸及其衍生物
• 英文名称: rac-ethyl 3-hydroxy-5-phenylpent-4-ynoate
• 英文别名: ethyl 3-hydroxy-5-phenyl-pent-4-ynoate；ethyl 3-hydroxy-5-phenylpent-4-ynoate
• CAS: 175410-79-4
• 化学式: C₁₃H₁₄O₃
• 分子量: 218.252
• InChiKey: GMPMMNKHOZFCFT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.35
• 重原子数：
  16.0
• 可旋转键数：
  3.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  46.53
• 氢给体数：
  1.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  rac-ethyl 3-hydroxy-5-phenylpent-4-ynoate 在 锂硼氢 作用下， 生成 5-phenyl-3,5-dihydro-2H-cyclopenta[b]pyran-6-one
  参考文献：
  名称：

  Synthesis of Alkylidenecyclopentenones via the Coupling of Propargyl Alcohol Derivatives with Cyclopropylcarbene−Chromium Complexes

  摘要：

  The coupling of propargylic alcohols and their derivatives with cyclopropylcarbene-chromium complexes has been investigated. The coupling reaction leads to alkylidenecyclopentenones or alkoxyalkylcyclopentenones, depending on the leaving group ability of the propargyl substituent. A mechanism involving formation of a cyclpentadienone, followed by reduction and beta-elimination, was proposed.

  DOI：

  10.1021/ol990002s
• 作为产物：
  描述：

  苯丙炔醛 、 溴乙酸乙酯 在 锌 作用下， 生成 rac-ethyl 3-hydroxy-5-phenylpent-4-ynoate
  参考文献：
  名称：

  Synthesis of Alkylidenecyclopentenones and Dialkylidenecyclopentenones via the Coupling of Propargylic Alcohol and 2-Alkyne-1,4-diol Derivatives with Cyclopropylcarbene–Chromium Complexes

  摘要：

  The coupling of propargylic alcohols and their derivatives with cyclopropylcarbene-chromium complexes has been investigated. The coupling reaction leads to alkylidenecyclopentenones or alkoxyalkyl-cyclopentenones, depending on the leaving group ability of the propargyl substituent. A mechanism involving formation of a cyclopentadienone, followed by reduction and beta-elimination is proposed. Coupling of cyclopropylcarbene complexes with 2-alkyne-1,4-diol derivatives leads to dialkylidenecyclopentenone derivatives via a double elimination process. (C) 2000 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(00)00212-x

文献信息

• Synthesis of Weinreb amides using diboronic acid anhydride-catalyzed dehydrative amidation of carboxylic acids
  作者：Naoyuki Shimada、Naoya Takahashi、Naoki Ohse、Masayoshi Koshizuka、Kazuishi Makino

  DOI：10.1039/d0cc05630h

  日期：——

  The first successful example of the direct synthesis of Weinreb amides using catalytic hydroxy-directed dehydrative amidation of carboxylic acids using the diboronic acid anhydride catalyst is described. The methodology is applicable to the concise syntheses of eight α-hydroxyketone natural products, namely, sattabacin, 4-hydroxy sattabacin, kurasoins A and B, soraphinols A and B, and circumcins B

  描述了使用二硼酸酐酸酐催化剂使用羧酸的催化羟基直接脱水酰胺化直接合成Weinreb酰胺的第一个成功实例。该方法适用于八种α-羟基酮天然产物的简明合成，它们分别为司塔巴星，4-羟基司他巴星，库拉索菌素A和B，茄型酚A和B以及环丁香素B和C。
• Utilization of whole cell mediated deracemization in a chemoenzymatic synthesis of enantiomerically enriched polycyclic chromeno[4,3-b] pyrrolidines
  作者：Thangavelu Saravanan、Sushital Jana、Anju Chadha

  DOI：10.1039/c4ob00615a

  日期：——

  Various aryl and alkyl substituted optically pure propargyl alcohols were obtained with excellent ee (up to >99%) and isolated yields (up to 87%) by deracemization using whole cells of Candida parapsilosis ATCC 7330. The whole cells show substrate specificity towards alkyl substituted propargyl alcohols and a switch in the enantioselectivity has been observed from ‘R’ to ‘S’ upon increasing the chain

  通过使用副念珠菌ATCC 7330的全细胞进行消旋，获得了各种具有芳烃和烷基取代基的光学纯炔丙醇，具有优异的ee（最高> 99％）和分离的收率（最高87％）。整个细胞显示出对烷基取代的底物特异性随着链长的增加，已观察到炔丙醇和对映选择性的变化，从“ R ”变为“ S ”。对映体纯（R）-4-（3-羟基丁-1-炔基）苄腈，（R）-4-（联苯-4-基）丁-3-炔-2-醇，（S）- 3-羟基-5-苯基戊-4-酸乙酯和（S使用该策略获得了）-4-苯基丁-3-炔-1,2-二醇。如此获得的光学纯的炔丙醇用作手性起始原料，成功合成了对映体富集的多取代的吡咯烷和吡咯衍生物，成功地证明了化学酶促路线。
• A Brønsted Acid Mediated Cascade Enone Synthesis from Aldehydes Containing a Tethered Propargylsilane
  作者：Rui Ramalho、Peter J. Jervis、Benson M. Kariuki、Alexander C. Humphries、Liam R. Cox

  DOI：10.1021/jo702351s

  日期：2008.2.1

  MeSO3H effects the intramolecular allenylation of a series of aldehydes 1 to provide allenyl alcohol product 3 as a single diastereoisomer. Cyclization proceeds rapidly at −78 °C. However, when the reaction is performed at room temperature, aldehyde 1 provides enone product 7 instead. A mechanism for the formation of this product is proposed in which the initially formed allenyl alcohol 3 undergoes

  MeSO 3 H进行一系列醛1的分子内烯丙基化，以提供烯丙醇产物3作为单个非对映异构体。环化反应在-78°C下迅速进行。然而，当反应在室温下进行时，醛1代替提供烯酮产物7。提出了形成该产物的机理，其中使最初形成的烯丙醇3进行脱水以提供烯丙基碳阳离子，其被水捕集，从而安装了烯酮。
• Chiral bipyrindine and biquinoline ligands: Their asymmetric synthesis and application to the synthesis of trans-whisky lactone
  作者：Katsuji Ito、Miwa Yoshitake、Tsutomu Katsuki

  DOI：10.1016/s0040-4020(96)00058-0

  日期：1996.3

  Chiral bipyrindine and biquinoline which have been reported to be efficient Ligands for the construction of chiral copper catalysts, were synthesized enantioselectively by rising Mn-salen catalyzed asymmetric epoxidation as a key step. Enantioselective synthesis of trans-whisky lactone was then achieved by way of enantiospecific ring expansion reaction of oxetane with a chiral copper catalyst bearing the bipyrindine Ligand as a chiral source.
• Stereochemical preference of Candida parapsilosis ATCC 7330 mediated deracemization: E- versus Z-aryl secondary alcohols
  作者：Thangavelu Saravanan、Rajendran Selvakumar、Mukesh Doble、Anju Chadha

  DOI：10.1016/j.tetasy.2012.09.014

  日期：2012.10

  The stereochemical preference of the biocatalyst, Candida parapsilosis ATCC 7330, was investigated with respect to the E/Z configuration in the deracemization and the asymmetric reduction of aryl secondary alcohols and prochiral ketones, respectively. The biocatalyst preferred the E-isomers over Z-isomers as substrates as evidenced from the experimental results of > 99% ee and up to 86% isolated yield for E-secondary alcohols. The synthesis of enantiomerically pure E-4-phenylbut-3-ene-1,2-diol (ee > 99%, isolated yield 86%) by whole cell mediated deracemization is reported here for the first time. The geometric preference of the enzymes was confirmed by using the cell free extract of this biocatalyst. Mechanistic insights using in silico studies showed that the E-isomers when located in the active site are favourably placed with respect to the catalytic triad (Ser-Tyr-Lys) for hydride transfer from NADPH. (C) 2012 Elsevier Ltd. All rights reserved.