(R)-3-methyl-5-phenylpent-4-ynol | 1174194-07-0

• 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: (R)-3-methyl-5-phenylpent-4-ynol
• 英文别名: (R)-3-methyl-5-phenylpent-4-yn-1-ol；(3R)-3-methyl-5-phenylpent-4-yn-1-ol
• CAS: 1174194-07-0
• 化学式: C₁₂H₁₄O
• 分子量: 174.243
• InChiKey: YTENODTUTYBAIH-NSHDSACASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.06
• 重原子数：
  13.0
• 可旋转键数：
  2.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  20.23
• 氢给体数：
  1.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  (R)-3-methyl-5-phenylpent-4-ynol 在 四溴化碳 、 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 以80%的产率得到(R)-(5-bromo-3-methylpent-1-ynyl)benzene
  参考文献：
  名称：

  Modular and Stereoselective Synthesis of Tetrasubstituted Helical Alkenes via a Palladium-Catalyzed Domino Reaction

  摘要：

  A highly modular and stereoselective synthesis of tetrasubstituted helical alkenes is accomplished by a Pd-catalyzed norbornene-mediated domino reaction. This protocol features the rapid assembly of four C-C bonds via sequential C-H activations and carbopalladations along with efficient access to enantiopure bromoalkyl aryl alkyne precursors using homologative alkynylation as the key transformation. Three distinct elements of stereoselectivity were observed in the preparation of the chiral helical alkenes: retention of stereochemistry of the substrates, induced helical diastereoselectivity in the alkene formation, and the exclusive exo-facial selectivity of the norbornene incorporation.

  DOI：

  10.1021/ol301495q
• 作为产物：
  描述：

  4-hydroxy-(2R)-2-methylbutanoic acid 在 盐酸 、 bis-triphenylphosphine-palladium(II) chloride 、 copper(l) iodide 、 正丁基锂 、 水 、 二异丁基氢化铝 、 三乙胺 、 二异丙胺 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 17.67h， 生成 (R)-3-methyl-5-phenylpent-4-ynol
  参考文献：
  名称：

  Modular and Stereoselective Synthesis of Tetrasubstituted Helical Alkenes via a Palladium-Catalyzed Domino Reaction

  摘要：

  A highly modular and stereoselective synthesis of tetrasubstituted helical alkenes is accomplished by a Pd-catalyzed norbornene-mediated domino reaction. This protocol features the rapid assembly of four C-C bonds via sequential C-H activations and carbopalladations along with efficient access to enantiopure bromoalkyl aryl alkyne precursors using homologative alkynylation as the key transformation. Three distinct elements of stereoselectivity were observed in the preparation of the chiral helical alkenes: retention of stereochemistry of the substrates, induced helical diastereoselectivity in the alkene formation, and the exclusive exo-facial selectivity of the norbornene incorporation.

  DOI：

  10.1021/ol301495q

文献信息

• Chemoselective Biohydrogenation of Alkenes in the Presence of Alkynes for the Homologation of 2‐Alkynals/3‐Alkyn‐2‐ones into 4‐Alkynals/Alkynols
  作者：Danilo Colombo、Elisabetta Brenna、Francesco G. Gatti、Maria Chiara Ghezzi、Daniela Monti、Fabio Parmeggiani、Francesca Tentori

  DOI：10.1002/adsc.201900177

  日期：——

  activated alkene bonds by ene‐reductases (ERs) is completely chemoselective, because of the mechanism of the reaction. Thus, we investigated the use of ERs belonging to the Old Yellow Enzyme family for the reduction of α,β‐unsaturated aldehydes with a conjugated C≡C triple bond at the γ position. This reaction was exploited as the key step for the development of an effective homologation route to convert

  在炔烃的存在下烯烃的化学选择氢化是用传统化学方法实现的非常具有挑战性的转化。开发一种有效的方法来进行这种转化将丰富有机化学家可用的工具包，以开发有用的合成路线，并创建新的结构基序。由于反应机理，烯还原酶（ER）还原活化的烯烃键是完全化学选择性的。因此，我们研究了使用旧黄色酶家族的ER来还原在γ位上具有共轭C≡C三键的α，β-不饱和醛。
• Asymmetric Organocatalytic Formal Alkynylation and Alkenylation of α,β-Unsaturated Aldehydes
  作者：Martin Nielsen、Christian Borch Jacobsen、Márcio W. Paixão、Nicole Holub、Karl Anker Jørgensen

  DOI：10.1021/ja903920j

  日期：2009.8.5

  stereoselective organocatalytic one-pot protocol for the formal alkynylation and alkenylation of alpha,beta-unsaturated aldehydes using novel chemistry based on beta-keto heterocyclic sulfones is presented. The organocatalytic step is catalyzed by a prolinol derivative and allows for the formation of important optically active compounds. Further transformations of the beta-keto heterocyclic sulfone moiety,

  提出了一种使用基于 β-酮杂环砜的新型化学方法对 α、β-不饱和醛进行正式炔基化和烯基化的高度立体选择性有机催化一锅法。有机催化步骤由脯氨醇衍生物催化，并允许形成重要的光学活性化合物。基于 Smiles 重排的新发展，通过与 Julia-Kocienski 反应平行的过程，对 β-酮杂环砜部分进行了进一步的转化，产生了 β-炔基化醛和 3-链烯基化醇。各种光学活性炔烃和烯烃的合成证明了这两种转化的范围。此外，还进行了醛和醇官能度的不同转化。最后，