methyl (4R)-4-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-4,5-dihydro-1H-pyrazole-3-carboxylate | 206981-96-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl (4R)-4-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-4,5-dihydro-1H-pyrazole-3-carboxylate
• CAS: 206981-96-6
• 化学式: C₁₀H₁₆N₂O₄
• 分子量: 228.248
• InChiKey: ZOJFEXWJEXJZIH-NKWVEPMBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.4
• 重原子数：
  16
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  69.2
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  methyl (4R)-4-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-4,5-dihydro-1H-pyrazole-3-carboxylate 在 n-Bu₄IO₄ 、 溶剂黄146 作用下， 以 丙酮 为溶剂， 反应 8.0h， 生成 甲基(1S,2R)-2-甲酰基环丙烷羧酸酯
  参考文献：
  名称：

  Controlling π-Facial Diastereoselectivity in the 1,3-Dipolar Cycloadditions of Diazomethane to Chiral Pentenoates and Furanones:  Enantioselective Stereodivergent Syntheses of Cyclopropane Hydroxy Acids and Didehydro Amino Acids

  摘要：

  The title compounds have been synthesized in both enantiomeric forms and in good overall yields by using D-glyceraldehyde as the single chiral precursor. The efficiency and usefulness of the synthetic routes have been secured by performing controlled manipulations of the functional groups and by highly stereoselective transformations, namely Wittig-Horner condensations and cyclopropanations. Cyclopropane derivatives have been synthesized through 1,3-dipolar cycloaddition of diazomethane to chiral pentenoates or furanones obtained, in turn, from D-glyceraldehyde. Syn/anti stereochemistry of the cycloadducts has been unequivocally assigned and rationalized. Since pi-facial diastereoselectivity involved in these cycloadditions is the opposite for cyclic and open-chain structures, enantiomeric series of products can be derived.

  DOI：

  10.1021/jo972219a
• 作为产物：
  描述：

  重氮甲烷 、 methyl (2Z)-3-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]acrylate 以 乙醚 为溶剂， 反应 18.0h， 以90%的产率得到methyl (4R)-4-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-4,5-dihydro-1H-pyrazole-3-carboxylate
  参考文献：
  名称：

  Controlling π-Facial Diastereoselectivity in the 1,3-Dipolar Cycloadditions of Diazomethane to Chiral Pentenoates and Furanones:  Enantioselective Stereodivergent Syntheses of Cyclopropane Hydroxy Acids and Didehydro Amino Acids

  摘要：

  The title compounds have been synthesized in both enantiomeric forms and in good overall yields by using D-glyceraldehyde as the single chiral precursor. The efficiency and usefulness of the synthetic routes have been secured by performing controlled manipulations of the functional groups and by highly stereoselective transformations, namely Wittig-Horner condensations and cyclopropanations. Cyclopropane derivatives have been synthesized through 1,3-dipolar cycloaddition of diazomethane to chiral pentenoates or furanones obtained, in turn, from D-glyceraldehyde. Syn/anti stereochemistry of the cycloadducts has been unequivocally assigned and rationalized. Since pi-facial diastereoselectivity involved in these cycloadditions is the opposite for cyclic and open-chain structures, enantiomeric series of products can be derived.

  DOI：

  10.1021/jo972219a

文献信息

• 1,3-Dipolar Cycloadditions of Diazomethane to Chiral Electron-Deficient Olefins:  The Origin of the π-Facial Diastereoselection
  作者：Elena Muray、Angel Alvarez-Larena、Joan F. Piniella、Vicenç Branchadell、Rosa M. Ortuño

  DOI：10.1021/jo991227j

  日期：2000.1.1

  The stereochemical outcome of diazomethane cycloadditions to several chiral electron-deficient olefins has been investigated in order to establish the origin of the pi-facial diastereoselection. Nitro olefins, vinyl sulfones, enoates, and 2-amino enoates have been used for such a purpose. These substrates have been prepared from D-glyceraldehyde acetonide through Wittig-type condensations and present

  研究了重氮甲烷环加成到几种手性电子缺陷烯烃上的立体化学结果，以便确定pi非对映选择性的起源。硝基烯烃，乙烯基砜，烯酸酯和2-氨基烯酸酯已用于此目的。这些底物是由D-甘油醛丙酮化物通过Wittig型缩合反应制得的，并具有一个由庞大的二氧戊环提供的烷氧基取代基，该取代基与立体异构的烯丙基碳相连。在所有情况下，均已获得作为主要异构体的加合物，而与双键的Z / E立体化学以及取代基的数量和性质无关，不对称烯丙基碳的手性是造成非对映异构的唯一原因。
• Controlling π-Facial Diastereoselectivity in the 1,3-Dipolar Cycloadditions of Diazomethane to Chiral Pentenoates and Furanones:  Enantioselective Stereodivergent Syntheses of Cyclopropane Hydroxy Acids and Didehydro Amino Acids
  作者：Marta Martín-Vilà、Neuh Hanafi、José M. Jiménez、Angel Alvarez-Larena、Joan F. Piniella、Vicenç Branchadell、Antonio Oliva、Rosa M. Ortuño

  DOI：10.1021/jo972219a

  日期：1998.5.1

  The title compounds have been synthesized in both enantiomeric forms and in good overall yields by using D-glyceraldehyde as the single chiral precursor. The efficiency and usefulness of the synthetic routes have been secured by performing controlled manipulations of the functional groups and by highly stereoselective transformations, namely Wittig-Horner condensations and cyclopropanations. Cyclopropane derivatives have been synthesized through 1,3-dipolar cycloaddition of diazomethane to chiral pentenoates or furanones obtained, in turn, from D-glyceraldehyde. Syn/anti stereochemistry of the cycloadducts has been unequivocally assigned and rationalized. Since pi-facial diastereoselectivity involved in these cycloadditions is the opposite for cyclic and open-chain structures, enantiomeric series of products can be derived.