3-Methyl-2-phenylmethoxybutan-1-ol | 84994-63-8

• 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: 3-Methyl-2-phenylmethoxybutan-1-ol
• CAS: 84994-63-8；129919-92-2
• 化学式: C₁₂H₁₈O₂
• 分子量: 194.274
• InChiKey: UISANADCMJCRIX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  14
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 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：

  3-Methyl-2-phenylmethoxybutan-1-ol 在 草酰氯 、 二甲基亚砜 、 三乙胺 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 为溶剂， 反应 4.0h， 生成 (4R*)-Methyl 2-(N-benzoylamino)-4-(benzyloxy)-5-methyl-(2Z)-hexenoate
  参考文献：
  名称：

  Stereoselective bromination of dehydroamino acids with controllable retention or inversion of olefin configuration

  摘要：

  Dehydroamino acid esters react with brominating reagents to produce syn-a-bromo imines as the major products, which undergo tautomerization to mixtures of the diastereomeric (E)- and (Z)-beta-bromo-alpha,beta-dehydroamino acids upon treatment with base. Herein, we examine the characteristics of dehydroamino acid substrates 1 that affect both the diastereofacial selectivity of the bromination and the configuration of the resulting olefin product(s) 3. In these studies, we demonstrate E- and Z-diastereoselectivity for this reaction using kinetic and thermodynamic reaction conditions. Z-Vinyl bromides were shown to be the thermodynamically more stable products and were formed from the kinetic E-isomers by DABCO-induced isomerization. High levels of kinetic E-selectivity were obtained by treatment of the intermediate alpha-bromo imines with hindered amine bases such as 2,2,6,6-tetramethylpiperidine or sodium hexamethyldisilazide. The reaction conditions detailed herein allow for the stereodivergent preparation of both E- and Z-vinyl bromide products from either diastereomeric E- or Z-olefin starting material with useful levels of diastereoselectivity.

  DOI：

  10.1021/jo00068a047
• 作为产物：
  描述：

  2-羟基-3-甲基丁酸 在 lithium aluminium tetrahydride 、 四丁基碘化铵 、 sodium hydride 作用下， 以 四氢呋喃 、 乙醚 为溶剂， 反应 2.75h， 生成 3-Methyl-2-phenylmethoxybutan-1-ol
  参考文献：
  名称：

  Stereoselective bromination of dehydroamino acids with controllable retention or inversion of olefin configuration

  摘要：

  Dehydroamino acid esters react with brominating reagents to produce syn-a-bromo imines as the major products, which undergo tautomerization to mixtures of the diastereomeric (E)- and (Z)-beta-bromo-alpha,beta-dehydroamino acids upon treatment with base. Herein, we examine the characteristics of dehydroamino acid substrates 1 that affect both the diastereofacial selectivity of the bromination and the configuration of the resulting olefin product(s) 3. In these studies, we demonstrate E- and Z-diastereoselectivity for this reaction using kinetic and thermodynamic reaction conditions. Z-Vinyl bromides were shown to be the thermodynamically more stable products and were formed from the kinetic E-isomers by DABCO-induced isomerization. High levels of kinetic E-selectivity were obtained by treatment of the intermediate alpha-bromo imines with hindered amine bases such as 2,2,6,6-tetramethylpiperidine or sodium hexamethyldisilazide. The reaction conditions detailed herein allow for the stereodivergent preparation of both E- and Z-vinyl bromide products from either diastereomeric E- or Z-olefin starting material with useful levels of diastereoselectivity.

  DOI：

  10.1021/jo00068a047

文献信息

• AN ASYMMETRIC SYNTHESIS OF α-BENZYLOXY ALDEHYDES HAVING A CHIRAL TERTIARY CENTER—AN APPLICATION TO THE ASYMMETRIC SYNTHESIS OF<i>exo</i>-(+)-BREVICOMIN—
  作者：Masatoshi Asami、Teruaki Mukaiyama

  DOI：10.1246/cl.1983.93

  日期：1983.1.5

  α-Benzyloxy aldehydes having a chiral tertiary center at α-carbon atom are synthesized in high enantiomeric excess by successive treatment of 2-methoxycarbonyl-3-phenyl-1,3-diazabicyclo[3.3.0]octane with diisobutylaluminum hydride (DIBAL-H) and Grignard reagents. The asymmetric reaction is applied to the total synthesis of exo-(+)-brevicomin.

  通过用氢化二异丁基铝（DIBAL-H）和格氏试剂连续处理 2-甲氧基羰基-3-苯基-1,3-二氮杂双环[3.3.0]辛烷，合成出对映体过量的、在 α 碳原子上具有手性叔中心的 α-苄氧基醛。该不对称反应被用于外-(+)-brevicomin 的全合成。