(R)-2-Benzyloxy-1,2-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethanone | 189701-51-7

• 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: (R)-2-Benzyloxy-1,2-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethanone
• 英文别名: (2R)-1,2-bis[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-phenylmethoxyethanone
• CAS: 189701-51-7
• 化学式: C₁₉H₂₆O₆
• 分子量: 350.412
• InChiKey: KTMZWWPDHPPYFD-BFYDXBDKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  25
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.63
• 拓扑面积：
  63.2
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  乙基溴化镁 、 (R)-2-Benzyloxy-1,2-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethanone 以 四氢呋喃 为溶剂， 反应 0.25h， 生成 (1R,2S)-1-Benzyloxy-1,2-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-butan-2-ol 、 (1R,2R)-1-Benzyloxy-1,2-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-butan-2-ol
  参考文献：
  名称：

  Diastereoselective Grignard Additions to O-Protected Polyhydroxylated Ketones:  A Reaction Controlled by Groundstate Conformation?

  摘要：

  The O-protected polyhydroxy ketones 9-14 and 39, 42 add sigma-type Grignard reagents with >90:10 stereoselectivity to give the 3,4-syn-adducts 17-28 and 43, 45, respectively, as the major diastereomers (Tables 1 and 2). The stereoselectivity is interpreted in terms of early transition states which are very close to the groundstate conformations shown in Figure 6 and 7. These demonstrate that the ''top face'' of the carbonyl group is much less shielded than the ''bottom'' face. Complexation phenomena are of minor importance. It is also shown that the classical transition state models (Felkin-Anh or chelate Cram) are not applicable to polyoxygenated ketones.

  DOI：

  10.1021/jo961542v
• 作为产物：
  描述：

  双丙酮-D-甘露糖醇 在 草酰氯 、 sodium hydride 、 二甲基亚砜 、 三乙胺 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 21.0h， 生成 (R)-2-Benzyloxy-1,2-bis-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethanone
  参考文献：
  名称：

  Mulzer, Johann; Pietschmann, Catarina; Schoellhorn, Bernd, Liebigs Annalen, 1995, # 8, p. 1433 - 1440

  摘要：

  DOI：

文献信息

• Mulzer, Johann; Pietschmann, Catarina; Schoellhorn, Bernd, Liebigs Annalen, 1995, # 8, p. 1433 - 1440
  作者：Mulzer, Johann、Pietschmann, Catarina、Schoellhorn, Bernd、Buschmann, Juergen、Luger, Peter

  DOI：——

  日期：——
• Diastereoselective Grignard Additions to <i>O</i>-Protected Polyhydroxylated Ketones:  A Reaction Controlled by Groundstate Conformation?
  作者：Johann Mulzer、Catarina Pietschmann、Jürgen Buschmann、Peter Luger

  DOI：10.1021/jo961542v

  日期：1997.6.13

  The O-protected polyhydroxy ketones 9-14 and 39, 42 add sigma-type Grignard reagents with >90:10 stereoselectivity to give the 3,4-syn-adducts 17-28 and 43, 45, respectively, as the major diastereomers (Tables 1 and 2). The stereoselectivity is interpreted in terms of early transition states which are very close to the groundstate conformations shown in Figure 6 and 7. These demonstrate that the ''top face'' of the carbonyl group is much less shielded than the ''bottom'' face. Complexation phenomena are of minor importance. It is also shown that the classical transition state models (Felkin-Anh or chelate Cram) are not applicable to polyoxygenated ketones.