(+)-(2S,3R)-3-cyclohexyl-4-methylene-1-(tert-butylsulfonyl)pyrrolidine-2-carboxylic acid ethyl ester

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (+)-(2S,3R)-3-cyclohexyl-4-methylene-1-(tert-butylsulfonyl)pyrrolidine-2-carboxylic acid ethyl ester
• 英文别名: ethyl (2S,3R)-1-tert-butylsulfonyl-3-cyclohexyl-4-methylidenepyrrolidine-2-carboxylate
• 化学式: C₁₈H₃₁NO₄S
• 分子量: 357.514
• InChiKey: LZCVEBZDBFNXBE-HOTGVXAUSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  24
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  72.1
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  环己基丙酮 在 sodium methylate 正丁基锂 、 trimethoxonium tetrafluoroborate 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 118.0h， 生成 (+)-(2S,3R)-3-cyclohexyl-4-methylene-1-(tert-butylsulfonyl)pyrrolidine-2-carboxylic acid ethyl ester
  参考文献：
  名称：

  Functionalized Chiral Vinyl Aminosulfoxonium Salts:  Asymmetric Synthesis and Application to the Synthesis of Enantiopure Unsaturated Prolines, β,γ-Dehydro Amino Acids, and Cyclopentanoid Keto Aminosulfoxonium Ylides

  摘要：

  Methylation of the enantiopure functionalized vinyl sulfoximines 5a-e and 14a-d followed by a F-ion or DBU-mediated isomerization of the vinyl aminosulfoxonium salts 7a-e and 15a-d, respectively, gave the allyl aminosulfoxonium salts 10a-e and 17a-d, respectively. A concomitant intramolecular substitution of the aminosulfoxonium group of 10a-e and 17a-d by the amino group afforded the unsaturated prolines 8a-e and 18a-d, respectively. The starting vinyl sulfoximines are accessible through a highly selective and stereo-complementary aminoalkylation of the corresponding sulfonimidoyl-substituted mono- and bis( allyl) titanium complexes with the imino ester 4. The vinyl aminosulfoxonium salts 34, 7a-d, and E-15c experienced upon treatment with the Cl- ion a migratory substitution with formation of the delta-chloro-beta,gamma-dehydro amino acids 36, E/Z-37a-d, and 38, respectively. A migratory substitution of the hydroxy-substituted vinyl aminosulfoxonium salts 46a and 46b furnished the delta-chloro allyl alcohols E/Z-48a and E-48b, respectively. A facile one-pot conversion of the vinyl sulfoximines 31b, 5c and 45a to the allyl chlorides 36, E/Z-37c and E/Z-48a, respectively, was achieved upon treatment with a chloroformiate. A tandem cyclization of the vinyl aminosulfoxonium salts 7b, Al-7b and 57 with LiN( H) tBu yielded the cyclopentanoid keto aminosulfoxonium ylides 54, Al-54, 59, 60 and 61, respectively. The structure of the tricyclic keto aminosulfoxonium ylide Al-54 has been determined by X-ray crystal structure analysis. Ab initio calculations and a NBO analysis of the tricyclic keto aminosulfoxonium ylide XXIII show a polar structure stabilized by electrostatic interactions between the ylidic C atom and both the carbonyl C atom and the S atom.

  DOI：

  10.1021/ja061152i

文献信息

• Asymmetric synthesis of 3-substituted unsaturated prolines from chiral sulfoximine substituted allyl titanium(IV) complexes
  作者：Shashi Kant Tiwari、Andreas Schneider、Stefan Koep、Hans-Joachim Gais

  DOI：10.1016/j.tetlet.2004.09.062

  日期：2004.11

  ester 3. Activation of sulfoximines 4a–e and 11a–c through methylation of the sulfoximine group followed by a KF mediated isomerization of the vinyl aminosulfoxonium salts 5a–e and 12a–c, respectively, to the corresponding allyl aminosulfoxonium salt 6a–e and 13a–c, respectively, and a subsequent intramolecular nucleophilic substitution of the allylic aminosulfoxonium group afforded the enantio- and diastereomerically

  3-取代的Δ的不对称合成3,4-不饱和脯氨酸7A - ë和3-取代的4-亚甲基脯氨酸14A - Ç从相应的起始γ，δ不饱和α氨基酸4A - ë和11A - Ç，分别描述。氨基酸衍生物4a – e和11a – d是通过相应的磺胺亚胺取代的烯丙基钛（IV）配合物2a – e和10a – d的氨基烷基化获得的分别与Ñ -叔-butylsulfonyl亚氨酸酯3。通过亚砜亚胺基团的甲基化活化亚砜亚胺4a – e和11a – c，然后通过KF介导的乙烯基氨基亚砜氧鎓盐5a – e和12a – c分别异构化为相应的烯丙基氨基亚砜氧鎓盐6a – e和13a – c分别地，以及随后的烯丙基氨基亚砜基团的分子内亲核取代以中等至高收率提供了对映体和非对映体纯的脯氨酸衍生物。
• Functionalized Chiral Vinyl Aminosulfoxonium Salts:  Asymmetric Synthesis and Application to the Synthesis of Enantiopure Unsaturated Prolines, β,γ-Dehydro Amino Acids, and Cyclopentanoid Keto Aminosulfoxonium Ylides
  作者：Shashi Kant Tiwari、Hans-Joachim Gais、Andreas Lindenmaier、Gadamsetti Surendra Babu、Gerhard Raabe、Leleti Rajender Reddy、Franz Köhler、Markus Günter、Stefan Koep、Vijaya Bhaskara Reddy Iska

  DOI：10.1021/ja061152i

  日期：2006.6.1

  Methylation of the enantiopure functionalized vinyl sulfoximines 5a-e and 14a-d followed by a F-ion or DBU-mediated isomerization of the vinyl aminosulfoxonium salts 7a-e and 15a-d, respectively, gave the allyl aminosulfoxonium salts 10a-e and 17a-d, respectively. A concomitant intramolecular substitution of the aminosulfoxonium group of 10a-e and 17a-d by the amino group afforded the unsaturated prolines 8a-e and 18a-d, respectively. The starting vinyl sulfoximines are accessible through a highly selective and stereo-complementary aminoalkylation of the corresponding sulfonimidoyl-substituted mono- and bis( allyl) titanium complexes with the imino ester 4. The vinyl aminosulfoxonium salts 34, 7a-d, and E-15c experienced upon treatment with the Cl- ion a migratory substitution with formation of the delta-chloro-beta,gamma-dehydro amino acids 36, E/Z-37a-d, and 38, respectively. A migratory substitution of the hydroxy-substituted vinyl aminosulfoxonium salts 46a and 46b furnished the delta-chloro allyl alcohols E/Z-48a and E-48b, respectively. A facile one-pot conversion of the vinyl sulfoximines 31b, 5c and 45a to the allyl chlorides 36, E/Z-37c and E/Z-48a, respectively, was achieved upon treatment with a chloroformiate. A tandem cyclization of the vinyl aminosulfoxonium salts 7b, Al-7b and 57 with LiN( H) tBu yielded the cyclopentanoid keto aminosulfoxonium ylides 54, Al-54, 59, 60 and 61, respectively. The structure of the tricyclic keto aminosulfoxonium ylide Al-54 has been determined by X-ray crystal structure analysis. Ab initio calculations and a NBO analysis of the tricyclic keto aminosulfoxonium ylide XXIII show a polar structure stabilized by electrostatic interactions between the ylidic C atom and both the carbonyl C atom and the S atom.