(2S,3R,4R,5R,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methoxy-6-methyloxan-3-ol | 1133153-31-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2S,3R,4R,5R,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methoxy-6-methyloxan-3-ol
• CAS: 1133153-31-7
• 化学式: C₁₉H₄₂O₅Si₂
• 分子量: 406.71
• InChiKey: HCQIJVHUKZLLQQ-HHARLNAUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.52
• 重原子数：
  26
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  57.2
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (2S,3R,4R,5R,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methoxy-6-methyloxan-3-ol 、 2,2,5,6-四甲基-4H-1,3-二氧杂-4-酮 以 邻二甲苯 为溶剂， 以92%的产率得到[(2S,3R,4R,5R,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methoxy-6-methyloxan-3-yl] 2-methyl-3-oxobutanoate
  参考文献：
  名称：

  Stereoselective α-alkylation of methyl 6-deoxy-3,4-di-O-(tert-butyldimethylsilyl)-2-O-(2-methyl-3-oxobutanoyl)-α-d-glucopyranoside

  摘要：

  Allylation and benzylation at the alpha-carbon of alpha-methylated acetoacetyl (2-methyl-3-oxobutanoyl) group incorporated into the 2-OH of methyl 6-deoxy-3,4-O-(tert-butyldimethylsilyl)-alpha-D-glucopyranoside provided the respective alpha,alpha-differentially alkylated acetoacetyl derivatives, both with high diastereoselectivity. Thus-obtained doubly alkylated products possess an all-carbon quaternary stereogenic center with an absolute stereochemistry opposite to that introduced by using the 4-O-acetoacetyl regioisomer as the alkylation substrate. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2008.12.091
• 作为产物：
  描述：

  在 lithium hexamethyldisilazane 作用下， 以 四氢呋喃 为溶剂， 反应 1.0h， 以85%的产率得到(2S,3R,4R,5R,6R)-4,5-bis[[tert-butyl(dimethyl)silyl]oxy]-2-methoxy-6-methyloxan-3-ol
  参考文献：
  名称：

  Stereoselective α-alkylation of methyl 6-deoxy-3,4-di-O-(tert-butyldimethylsilyl)-2-O-(2-methyl-3-oxobutanoyl)-α-d-glucopyranoside

  摘要：

  Allylation and benzylation at the alpha-carbon of alpha-methylated acetoacetyl (2-methyl-3-oxobutanoyl) group incorporated into the 2-OH of methyl 6-deoxy-3,4-O-(tert-butyldimethylsilyl)-alpha-D-glucopyranoside provided the respective alpha,alpha-differentially alkylated acetoacetyl derivatives, both with high diastereoselectivity. Thus-obtained doubly alkylated products possess an all-carbon quaternary stereogenic center with an absolute stereochemistry opposite to that introduced by using the 4-O-acetoacetyl regioisomer as the alkylation substrate. (C) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2008.12.091

文献信息

• Stereoselective α-alkylation of methyl 6-deoxy-3,4-di-O-(tert-butyldimethylsilyl)-2-O-(2-methyl-3-oxobutanoyl)-α-d-glucopyranoside
  作者：Yoko Akashi、Ken-ichi Takao、Kin-ichi Tadano

  DOI：10.1016/j.tetlet.2008.12.091

  日期：2009.3

  Allylation and benzylation at the alpha-carbon of alpha-methylated acetoacetyl (2-methyl-3-oxobutanoyl) group incorporated into the 2-OH of methyl 6-deoxy-3,4-O-(tert-butyldimethylsilyl)-alpha-D-glucopyranoside provided the respective alpha,alpha-differentially alkylated acetoacetyl derivatives, both with high diastereoselectivity. Thus-obtained doubly alkylated products possess an all-carbon quaternary stereogenic center with an absolute stereochemistry opposite to that introduced by using the 4-O-acetoacetyl regioisomer as the alkylation substrate. (C) 2008 Elsevier Ltd. All rights reserved.