(2R,3R,4S)-3-[tert-butyl(dimethyl)silyl]oxy-2,4-dimethyl-5-phenylmethoxypentanal | 167842-07-1

• 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: (2R,3R,4S)-3-[tert-butyl(dimethyl)silyl]oxy-2,4-dimethyl-5-phenylmethoxypentanal
• CAS: 167842-07-1
• 化学式: C₂₀H₃₄O₃Si
• 分子量: 350.574
• InChiKey: AEEPIQVHLBMFBQ-LNLFQRSKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.06
• 重原子数：
  24
• 可旋转键数：
  10
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.65
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (2R,3R,4S)-3-[tert-butyl(dimethyl)silyl]oxy-2,4-dimethyl-5-phenylmethoxypentanal 在 盐酸 、 sodium tetrahydroborate 作用下， 生成 (2S,3S,4S)-5-Benzyloxy-2,4-dimethylpentan-1,3-diol
  参考文献：
  名称：

  Polyketide Synthesis Using the Boron-Mediated, anti-Aldol Reactions of Lactate-Derived Ketones: Total Synthesis of (-)-ACRL Toxin IIIB

  摘要：

  The boron-mediated, anti-selective, aldol reactions of ketone 2 (and related derivatives) proceed with high levels of asymmetric induction, diastereoselectivities of up to 200:1 in favour of the aldol adducts 4 are obtained with achiral aldehydes and reagent control operates with chiral aldehydes. These lactate-derived ketones provide a versatile chiral auxiliary for the synthesis of beta-hydroxy carbonyl compounds. Oxidative removal of the auxiliary provides enantiomerically pure aldehydes 5, while reductive deoxygenation gives the corresponding ethyl ketones 6. This practical asymmetric methodology for generating anti-aldols is illustrated by an efficient total synthesis of (-)-ACRL toxin IIIB (7), which proceeds in 15 steps from 2 with 21% overall yield and 88% diastereoselectivity.

  DOI：

  10.1055/s-1998-5929
• 作为产物：
  描述：

  (2S,4R,5R,6S)-2-Benzoyloxy-7-benzyloxy-5-hydroxy-4,6-dimethylheptan-3-one 在 2,6-二甲基吡啶 、 sodium periodate 、 锂硼氢 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 反应 25.5h， 生成 (2R,3R,4S)-3-[tert-butyl(dimethyl)silyl]oxy-2,4-dimethyl-5-phenylmethoxypentanal
  参考文献：
  名称：

  Polyketide Synthesis Using the Boron-Mediated, anti-Aldol Reactions of Lactate-Derived Ketones: Total Synthesis of (-)-ACRL Toxin IIIB

  摘要：

  The boron-mediated, anti-selective, aldol reactions of ketone 2 (and related derivatives) proceed with high levels of asymmetric induction, diastereoselectivities of up to 200:1 in favour of the aldol adducts 4 are obtained with achiral aldehydes and reagent control operates with chiral aldehydes. These lactate-derived ketones provide a versatile chiral auxiliary for the synthesis of beta-hydroxy carbonyl compounds. Oxidative removal of the auxiliary provides enantiomerically pure aldehydes 5, while reductive deoxygenation gives the corresponding ethyl ketones 6. This practical asymmetric methodology for generating anti-aldols is illustrated by an efficient total synthesis of (-)-ACRL toxin IIIB (7), which proceeds in 15 steps from 2 with 21% overall yield and 88% diastereoselectivity.

  DOI：

  10.1055/s-1998-5929

文献信息

• Manipulation of the aldol adducts from lactate-derived ketones. A versatile chiral auxiliary for the asymmetric synthesis of β-hydroxy carbonyl compounds
  作者：Ian Paterson、Debra J. Wallace

  DOI：10.1016/0040-4039(94)88435-8

  日期：1994.11

  The ketones 1 and 2 can be transformed into a wide range of enantiomerically-pure anti and syn α-methyl-β-hydroxy ketones and aldehydes. The α′-methyl group in 5 and 11 may be retained, demonstrating the use of the lactate-derived group as an optional chiral auxiliary.

  酮1和2可以转化到广泛范围的对映体纯的抗和顺式α甲基β羟基酮和醛。可以保留5和11中的α'-甲基，这表明使用乳酸酯衍生的基团作为任选的手性助剂。