(R)-2-Isobutylbernsteinsaeuredimethylester | 58310-04-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (R)-2-Isobutylbernsteinsaeuredimethylester
• 英文别名: dimethyl (2R)-2-(2-methylpropyl)butanedioate
• CAS: 58310-04-6
• 化学式: C₁₀H₁₈O₄
• 分子量: 202.251
• InChiKey: LMEQJYNESABIEA-MRVPVSSYSA-N

物化性质

• 沸点：
  222.6±8.0 °C(Predicted)
• 密度：
  1.004±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  14
• 可旋转键数：
  7
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  (E)-2-(2-methylpropylidene)succinic acid 在 氯化亚砜 、 [Rh((R,R)-iPr-JDayPhos)(MeOH)₂]BF₄ 、 氢气 作用下， 以 甲醇 为溶剂， 22.0 ℃ 、300.01 kPa 条件下， 反应 0.5h， 生成 (R)-2-Isobutylbernsteinsaeuredimethylester
  参考文献：
  名称：

  1,1'-二茂铁基核心的P-Stereogenic二膦酸酯模块：''JDayPhos''系列及其在铑（I）催化加氢中的应用

  摘要：

  开发了一种新型的基于二茂铁的P-立体异构二膦配体系列JDayPhos，该化合物的一些成员的铑（I）配合物表现出出色的对映选择性（高达> 99％ee），并且在β-未取代或-β的不对称氢化中表现出高活性。取代的衣康酸酯和α-亚甲基-γ-氧代羧酸酯。

  DOI：

  10.1002/adsc.201800255

文献信息

• Asymmetric Hydrogenation of Maleic Acid Diesters and Anhydrides
  作者：Maurizio Bernasconi、Marc-André Müller、Andreas Pfaltz

  DOI：10.1002/anie.201402034

  日期：2014.5.19

  Asymmetric hydrogenation of maleic and fumaric acid derivatives with iridium catalysts based on N,P ligands provides an efficient route to chiral enantioenriched succinates. A new catalyst derived from a 2,6‐difluorophenyl‐substituted pyridine‐phosphinite ligand was developed and enables the conversion of a wide range of 2‐alkyl and 2‐arylmaleic acid diesters into the corresponding succinates in high

  马来酸和富马酸衍生物与基于N，P配体的铱催化剂的不对称加氢为手性对映体富集的琥珀酸酯提供了一条有效途径。开发了一种新的衍生自2,6-二氟苯基取代的吡啶-次膦酸酯配体的催化剂，该催化剂能够将各种范围的2-烷基和2-芳基马来酸二酯转化为具有高对映体纯度的琥珀酸酯。顺式/反式底物的混合物可以以对映收敛的方式被氢化，具有高的对映选择性，并进一步扩大了这种转化的范围。该产品是有价值的手性结构单元，具有许多生物活性化合物（例如金属蛋白酶抑制剂）中发现的结构基序。
• NOVEL BISPHOSPHINE LIGAND
  申请人：WATANABE Michimasa

  公开号：US20080242534A1

  公开（公告）日：2008-10-02

  A compound represented by the following general formula (I): [wherein R 1 represents hydrogen atom, or an alkyl group, R 2 represents a hydroxyalkyl group, or a triarylmethyloxyalkyl group, or R 1 and R 2 combine together to represent —C(R 3 )(R 4 )— (R 3 and R 4 represent hydrogen atom, an alkyl group, or hydroxyl group, or R 3 and R 4 may combine together to represent oxo group), or —C(R 5 )(R 6 )—O—C(R 7 )(R 8 )— (R 5 to R 8 represent hydrogen atom, an alkyl group, or hydroxyl group, or R 5 and R 6 may combine together to represent oxo group, and R 7 and R 8 may combine together to represent oxo group); Ar 1 to Ar 4 independently represent an aryl group (the aryl group may have 1 to 5 of the same or different substituents), *1 to *4 indicate asymmetric carbons, and configurations are cis between *1 and *2, cis between *3 and *4, and trans between *2 and *3]. An optically active phosphine ligand which can be easily synthesized and gives a transition metal complex showing superior asymmetric catalyst activity is provided.

  提供了一个由以下一般式（I）表示的化合物：【其中R1代表氢原子，或烷基团，R2代表羟基烷基团，或三芳基甲氧基烷基团，或R1和R2结合在一起表示—C(R3)(R4)—（R3和R4代表氢原子，烷基团，或羟基，或R3和R4可以结合在一起表示酮基），或—C(R5)(R6)—O—C(R7)(R8)—（R5到R8代表氢原子，烷基团，或羟基，或R5和R6可以结合在一起表示酮基，R7和R8可以结合在一起表示酮基）；Ar1到Ar4独立地代表芳基（芳基可能具有1到5个相同或不同的取代基），*1到*4表示不对称碳，配置在*1和*2之间为顺式，*3和*4之间为顺式，*2和*3之间为反式】。提供了一种可以轻松合成并给出显示出优越不对称催化剂活性的过渡金属配合物的光学活性膦配体。
• Dynamic Kinetic Resolution Utilizing 2-Oxoimidazolidine-4-carboxylate as a Chiral Auxiliary:  Stereoselective Alkylation of α-Bromo Amides with Malonic Ester Enolates
  作者：Akira Kubo、Hitoshi Kubota、Masami Takahashi、Ken-ichi Nunami

  DOI：10.1021/jo970484q

  日期：1997.8.1

  Stereoselective carbon-carbon bond formation by dynamic kinetic resolution using tert-butyl (4S)-1-methyl-2-oxoimidazolidine-4-carboxylate (1) as a chiral auxiliary was developed. Reaction of a diastereomeric mixture of tert-butyl (4S)-3-[(2RS)-2-bromoacyl]-1-methyl-2-oxoimidazolidine-4-carboxylates (2) with a malonic ester enolate in HMPA predominantly afforded tert-butyl (4S)-3-[(2R)-2-alkyl-3,3-bis(alkoxycarbonyl)propionyl]-1-methyl-2-oximidazolidine-4-carboxylate [(S,R)-8] in good yields. The stereoselectivity of this reaction was in accordance with our working hypothesis based on the conformational analysis of 2 and elucidated the unique characteristics of 1 as a novel chiral auxiliary for dynamic kinetic resolution. The alkylated products (S,R)-8ej,k were easily converted to chiral cx-alkyl succinic acid derivatives and chiral beta-amino acid derivatives, both of which have been known as key building blocks for the syntheses of a variety of biologically active compounds.
• Modular 1,1′-Ferrocenediyl-cored <i>P</i> -Stereogenic Diphosphines: ′′JDayPhos′′ Series and its Use in Rhodium(I)-Catalyzed Hydrogenation
  作者：Gašper Poklukar、Michel Stephan、Barbara Mohar

  DOI：10.1002/adsc.201800255

  日期：2018.7.4

  A novel ferrocene‐based P‐stereogenic diphospine ligand series dubbed JDayPhos was developed, which rhodium(I) complexes of some of its members exhibited excellent enantioselectivity (up to >99% ee) and high activity in asymmetric hydrogenation of β‐unsubstituted or ‐substituted itaconates and α‐methylene‐γ‐oxo‐carboxylates.

  开发了一种新型的基于二茂铁的P-立体异构二膦配体系列JDayPhos，该化合物的一些成员的铑（I）配合物表现出出色的对映选择性（高达> 99％ee），并且在β-未取代或-β的不对称氢化中表现出高活性。取代的衣康酸酯和α-亚甲基-γ-氧代羧酸酯。