trans-3-tert-butyl-5-hydroxymethyl-4-methyl-4,5-dihydroisoxazole | 138587-63-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑啉类
• 英文名称: trans-3-tert-butyl-5-hydroxymethyl-4-methyl-4,5-dihydroisoxazole
• 英文别名: [(4S,5S)-3-tert-butyl-4-methyl-4,5-dihydro-1,2-oxazol-5-yl]methanol
• CAS: 138587-63-0
• 化学式: C₉H₁₇NO₂
• 分子量: 171.239
• InChiKey: MKYPVBYOXRIBIA-RNFRBKRXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.89
• 拓扑面积：
  41.8
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  trans-3-tert-butyl-5-hydroxymethyl-4-methyl-4,5-dihydroisoxazole 在 草酰氯 、 氢气 、 硼酸 、 镍 、 二甲基亚砜 、 三乙胺 作用下， 以 甲醇 、 水 为溶剂， 反应 2.0h， 生成 (4,5)-anti-(5,6)-syn-5,6-dihydroxy-2,2-dimethyl-4-methylheptan-3-one
  参考文献：
  名称：

  Nucleophilic additions to and reductiosn of 5-formyl-and 5-acyl-2-isoxazolines (4,5-dihydeoisoxazoles): a stereoselective route to β,γ-dihydroxy ketones

  摘要：

  Reductions of readily available 5-acyl-2-isoxazolines with L-Selectride follow the Felkin-Anh model and produce syn-5-hydroxyalkyl-2-isoxazolines with excellent (> 95:5) selectivities. Swern oxidation of 5-hydroxymethyl-2-isoxazolines, followed by direct addition of a Grignard reagent to the intermediate 5-formyl-2-isoxazolines, also follows the Felkin-Anh model and produces anti-5-hydroxyalkyl-2-isoxazolines with modest (80:20) to excellent (> 95:5) selectivity. In contrast, additions of Grignard reagents to 5-acyl-2-isoxazolines follow the chelation model, and give syn or anti products (depending on choice of acyl substituent and Grignard reagent) with good (90:10) to excellent selectivity. These selectivities are almost always far superior to those that can be obtained by direct nitrile oxide cycloaddition to a chiral allylic alcohol or ether. The resulting products are readily reduced to syn- or anti-beta,gamma-dihydroxy ketones. A speculative model to explain this surprising reversal in selectivity between formyl and acyl isoxazolines is proposed.

  DOI：

  10.1039/p19910002613
• 作为产物：
  描述：

  (4S,5S)-5-[(1-benzyl-5,5-dimethyl-3-oxo-2-pyrazolidinyl)carbonyl]-4-methyl-3-tert-butyl-4,5-dihydroisoxazole 在 sodium tetrahydroborate 作用下， 生成 trans-3-tert-butyl-5-hydroxymethyl-4-methyl-4,5-dihydroisoxazole
  参考文献：
  名称：

  手性双萘酚亚胺-Ni（II）配合物催化的腈氧化物的不对称1,3-偶极环加成反应

  摘要：

  在手性联萘二胺（BINIM）-Ni（II）配合物的存在下，几种腈氧化物与3-（2-烯基）-2-恶唑烷酮和2-（2-烯基）-3-吡唑烷酮衍生物之间进行不对称环加成反应。作为催化剂。使用（R）-BINIM-4（3,5-二甲苯基）-2QN-Ni（II）配合物（30 mol％），区域选择性好（4-Me / 5-Me = 85:15），对映选择性高（96％ee）对于可分离的2,4,6-三甲基苄腈氧化物与3-巴豆酰基-5,5-二甲基-2-恶唑烷酮之间的反应，获得4-Me加合物的4-Me。在MS4Å存在下，由相应的羟基苯甲酰氯生成的取代的和未取代的苯甲腈氧化物和脂族腈氧化物与3-巴豆酰基-5,5-二甲基-2-恶唑烷酮，5,5-二甲基-3- （2-戊烯基）-2-恶唑烷酮，5,5-二甲基-3- [3-（乙氧基羰基）丙烯酰基] -2-恶唑烷酮，1-苄基-2-巴豆酰基-5,5-二甲基-3-吡唑烷酮和（R）-BI

  DOI：

  10.1021/jo802392c

文献信息

• Asymmetric 1,3-Dipolar Cycloaddition Reactions of Nitrile Oxides Catalyzed by Chiral Binaphthyldiimine-Ni(II) Complexes
  作者：Hiroyuki Suga、Yuki Adachi、Kouhei Fujimoto、Yasuhisa Furihata、Teruko Tsuchida、Akikazu Kakehi、Toshihide Baba

  DOI：10.1021/jo802392c

  日期：2009.2.6

  enantioselectivities and regioselectivities were obtained for the reactions using pyrazolidinone derivatives as the dipolarophiles. For the cycloadditions of 2-(2-alkenoyl)-1-benzyl-5,5-dimethyl-3-pyrazolidinones catalyzed by (R)-BINIM-4(3,5-xylyl)-2QN-Ni(II) complex (30 mol %), the enantioselectivity varied from 75% to 95% ee. The reactions between several nitrile oxides and 2-acryloyl-1-benzyl-5,5-di

  在手性联萘二胺（BINIM）-Ni（II）配合物的存在下，几种腈氧化物与3-（2-烯基）-2-恶唑烷酮和2-（2-烯基）-3-吡唑烷酮衍生物之间进行不对称环加成反应。作为催化剂。使用（R）-BINIM-4（3,5-二甲苯基）-2QN-Ni（II）配合物（30 mol％），区域选择性好（4-Me / 5-Me = 85:15），对映选择性高（96％ee）对于可分离的2,4,6-三甲基苄腈氧化物与3-巴豆酰基-5,5-二甲基-2-恶唑烷酮之间的反应，获得4-Me加合物的4-Me。在MS4Å存在下，由相应的羟基苯甲酰氯生成的取代的和未取代的苯甲腈氧化物和脂族腈氧化物与3-巴豆酰基-5,5-二甲基-2-恶唑烷酮，5,5-二甲基-3- （2-戊烯基）-2-恶唑烷酮，5,5-二甲基-3- [3-（乙氧基羰基）丙烯酰基] -2-恶唑烷酮，1-苄基-2-巴豆酰基-5,5-二甲基-3-吡唑烷酮和（R）-BI
• Nucleophilic additions to and reductiosn of 5-formyl-and 5-acyl-2-isoxazolines (4,5-dihydeoisoxazoles): a stereoselective route to β,γ-dihydroxy ketones
  作者：Dennis P. Curran、Jaincun Zhang

  DOI：10.1039/p19910002613

  日期：——

  Reductions of readily available 5-acyl-2-isoxazolines with L-Selectride follow the Felkin-Anh model and produce syn-5-hydroxyalkyl-2-isoxazolines with excellent (> 95:5) selectivities. Swern oxidation of 5-hydroxymethyl-2-isoxazolines, followed by direct addition of a Grignard reagent to the intermediate 5-formyl-2-isoxazolines, also follows the Felkin-Anh model and produces anti-5-hydroxyalkyl-2-isoxazolines with modest (80:20) to excellent (> 95:5) selectivity. In contrast, additions of Grignard reagents to 5-acyl-2-isoxazolines follow the chelation model, and give syn or anti products (depending on choice of acyl substituent and Grignard reagent) with good (90:10) to excellent selectivity. These selectivities are almost always far superior to those that can be obtained by direct nitrile oxide cycloaddition to a chiral allylic alcohol or ether. The resulting products are readily reduced to syn- or anti-beta,gamma-dihydroxy ketones. A speculative model to explain this surprising reversal in selectivity between formyl and acyl isoxazolines is proposed.