1-benzyl-2-crotonoyl-5,5-dimethyl-3-pyrazolidinone | 1092570-21-2

• 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: 1-benzyl-2-crotonoyl-5,5-dimethyl-3-pyrazolidinone
• 英文别名: 1-benzyl-2-crotonyl-5,5-dimethyl-3-pyrazolidinone；1-Benzyl-2-but-2-enoyl-5,5-dimethylpyrazolidin-3-one；1-benzyl-2-but-2-enoyl-5,5-dimethylpyrazolidin-3-one
• CAS: 1092570-21-2
• 化学式: C₁₆H₂₀N₂O₂
• 分子量: 272.347
• InChiKey: JMBNKBRBSBFTDF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  40.6
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  1-benzyl-2-crotonoyl-5,5-dimethyl-3-pyrazolidinone 、 benzohydroximoyl chloride 在 nickel(II) perchlorate hexahydrate 、 (R)-N,N'-bis[4-(3,5-xylyl)-2-quinolylmethylene]-1,1'-binaphthyl-2,2'-diamine 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 以94%的产率得到1-benzyl-2-[(4'S,5'S)-trans-dihydro-4-methyl-3-phenyl-isoxazol-5-yl]-5,5-dimethylpyrazolidine-3-one
  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

• <i>exo</i>- and Enantioselective Diels-Alder Reactions: Pyrazolidinone Auxiliaries as a Means to Enhanced <i>exo</i> Selectivity
  作者：Mukund Sibi、Xiaoping Nie、Jessica Shackleford、Levi Stanley、Frances Bouret

  DOI：10.1055/s-0028-1083438

  日期：——

  Achiral pyrazolidinone auxiliaries have been investigated in exo- and enantioselective Diels-Alder reactions. The effect of pyrazolidinone N-1 substitution and chiral ligand identity were studied in Yb(OTf) 3 -catalyzed exo-selective Diels-Alder reactions. An appropriate choice of pyrazolidinone auxiliary and Yb(OTf) 3 / Pybox chiral Lewis acid led to moderate exo selectivity and high enantioselectivity

  非手性吡唑烷酮助剂已在外选择性和对映选择性 Diels-Alder 反应中进行了研究。在 Yb(OTf) 3 催化的外选择性 Diels-Alder 反应中研究了吡唑烷酮 N-1 取代和手性配体同一性的影响。An appropriate choice of pyrazolidinone auxiliary and Yb(OTf) 3 / Pybox chiral Lewis acid led to moderate exo selectivity and high enantioselectivity for the exo-cycloadduct.
• Copper(II)-Catalyzed Exo and Enantioselective Cycloadditions of Azomethine Imines
  作者：Mukund P. Sibi、Digamber Rane、Levi M. Stanley、Takahiro Soeta

  DOI：10.1021/ol800904t

  日期：2008.7.17

  A strategy for exo and enantioselective 1,3-dipolar cycloaddition of azomethine imines to 2-acryloyl-3-pyrazolidinone is described. The corresponding cycloadducts are isolated with high diastereoselectivities (up to >96:4 exo/endo) and enantioselectivities (up to 98% ee).
• Diastereoselective Synthesis of Tetrahydrofurans by Lewis Acid Catalyzed Intermolecular Carbenoid–Carbonyl Reaction–Cycloaddition Sequences: Unusual Diastereoselectivity of Lewis Acid Catalyzed Cycloadditions
  作者：Yuta Hashimoto、Kennosuke Itoh、Akikazu Kakehi、Motoo Shiro、Hiroyuki Suga

  DOI：10.1021/jo400858u

  日期：2013.6.21

  The effects of including metal salts for three. component reactions involving alpha-alkyl-alpha-diazo esters, aromatic aldehydes, and 3-(2-alkenoyl)-2-oxazolidinones are described, in terms of yields and diastereoselectivities. Metal tetrafluorborates (10-30 mol %) such as Co(BF4)(2)center dot 6H(2)O, Ni(BF4)(2)center dot 6H(2)O, and AgBF4 were effective in delivering high yields and diastereoselectivities (93:7 to 99:1) of the corresponding tetrahydrofuran derivatives while suppressing the competitive formation of 1,3-dioxolane. Using (S)-3-(2-alkenoyl)-4-isopropyl-2-oxazolidinones as the dipolarophiles in the three-component reactions, in the presence of Ni(BF4)(2)center dot 6H(2)O or Co(ClO4)(2)center dot 6H(2)O (10-30 mol %), optically active tetrahydrofurans that possess four successive asymmetric centers were synthesized in high diastereoselectivities (99:1). On the basis of the configuration of the cycloadduct using the X-ray analysis, the high diastereoselectivity could be explained by the unusual Re-face approach to the dipolarophile in the presence of the Lewis acid, proceeding through the s-cis conformer of the 3-(2-alkenoyl)-2-oxazolidinone with the two carbonyls in opposing directions (dipole-dipole interaction).
• 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