(2S,3S)-2,3-dimethylpentanoic acid

• 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: (2S,3S)-2,3-dimethylpentanoic acid
• 英文别名: (2S,3S)-dimethylpentanoic acid；L-isoleucine
• 化学式: C₇H₁₄O₂
• 分子量: 130.187
• InChiKey: LBUDVZDSWKZABS-WDSKDSINSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  9
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (2S,3S)-2,3-dimethylpentanoic acid 在 氯化亚砜 、 1-羟基苯并三唑 、 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、 三乙胺 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 49.67h， 生成 Fmoc-Phe-Ile-OMe
  参考文献：
  名称：

  Total Synthesis of Stylissatin A, A Cyclic Peptide That Inhibits Nitric Oxide Production

  摘要：

  海洋海绵Stylissa massa中分离得到一种富含脯氨酸的七肽环化合物Stylissatin A，它来自巴布亚新几内亚。Stylissatin A的首次合成是通过固相和液相肽合成相结合实现的。天然和合成样品的Stylissatin A均显示出相当的抑制一氧化氮产生的效果，对脂多糖(LPS)刺激的小鼠巨噬细胞RAW264.7细胞的细胞毒性可忽略不计(合成样品的EC50 = 73 µM)。此外，尽管d-allo-Ile5的差向异构体效力较低，但Stylissatin A的叔丁基醚类似物的效力大约是天然产物的六倍(EC50 = 12 µM)。

  DOI：

  10.1246/bcsj.20150003
• 作为产物：
  描述：

  惕格酸 在 Amberlyst 15 、 草酰氯 、 cyclopropyl (1S,2R)-inda-box 、 硫酸 、 sodium hydride 、 N,N-二甲基甲酰胺 、 magnesium iodide 、 sodium nitrite 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 反应 7.75h， 生成 (2S,3S)-2,3-dimethylpentanoic acid
  参考文献：
  名称：

  Enantioselective Radical Addition/Trapping Reactions with α,β-Disubstituted Unsaturated Imides. Synthesis of anti-Propionate Aldols

  摘要：

  This manuscript describes a highly diastereo- and enantioselective intermolecular radical addition/hydrogen atom transfer to alpha,beta-disubstituted enoates. Additionally, we show that anti-propionate aldol-like products can be easily prepared from alpha-methyl-beta-acyloxyenoates in good yields and high diastereo- and enantioselectivities.

  DOI：

  10.1021/ja043371e

文献信息

• COMPLEX AND STRUCTURALLY DIVERSE COMPOUNDS
  申请人：The Board of Trustees of the University of Illinois

  公开号：US20150274638A1

  公开（公告）日：2015-10-01

  The invention provides a novel, general, and facile strategy for the creation of small molecules with high structural and stereochemical complexity. Aspects of the methods include ring system distortion reactions that are systematically applied to rapidly convert readily available natural products to structurally complex compounds with diverse molecular architectures. Through evaluation of chemical properties including fraction of sp 3 carbons, ClogP, and the number of stereogenic centers, these compounds are shown to be significantly more complex and diverse than those in standard screening collections. This approach is demonstrated with natural products (gibberellic acid, adrenosterone, and quinine) from three different structural classes, and methods are described for the application of this strategy to any suitable natural product.

  这项发明提供了一种新颖、通用且简便的策略，用于创造具有高结构和立体化学复杂性的小分子。该方法的方面包括系统地应用于快速将易得的天然产物转化为具有多样分子结构的结构复杂化合物的环系统失真反应。通过评估化学性质，包括sp3碳的分数、ClogP和立体中心的数量，这些化合物被证明比标准筛选集合中的化合物显着更复杂和多样化。这种方法是通过来自三个不同结构类别的天然产物（赤霉酸、肾上腺酮和奎宁）来展示的，并描述了将该策略应用于任何合适的天然产物的方法。
• Dipeptide Mimics, Libraries Combining Two Dipeptide Mimics with a Third Group, and Methods for Production Thereof
  申请人：Burgess Kevin

  公开号：US20120232268A1

  公开（公告）日：2012-09-13

  Monovalent compounds having moieties comprising at least one amino acid side chain are bound to a core molecule, which also comprises a nucleophilic moiety bound to said core molecule. Monovalent compounds also comprise a macrocyclic ring, a nucleophilic moiety, and a spacer group. Monovalent compounds may be combined into bivalent and trivalent compounds, some of which may have a labeling tag. Methods of production of bivalent compounds and contemplated uses thereof are disclosed.

  含有至少一个氨基酸侧链的单价化合物与核心分子结合，该核心分子还包括与所述核心分子结合的亲核团。单价化合物还包括一个大环环，一个亲核团和一个间隔基团。单价化合物可以组合成双价和三价化合物，其中一些可能具有标记标签。公开了双价化合物的生产方法和拟议的用途。
• Asymmetric Induction on Copper(I) Chloride catalyzed 1,4-addition of alkylmagnesium chlorides to ?, ?-disubstituted (E)-enoylsultams and subsequent protonation
  作者：Wolfgang Oppolzer、Arend J. Kingma

  DOI：10.1002/hlca.19890720622

  日期：1989.9.20

  Successive treatment of conjugated N-enoylsultams 2 with alkyl Grignard reagents/CuCl and aq. NH4Cl solution generated selectively two stereogenic centers at C(α) and C(β) providing, after flash chromatography and crystallization, acylsultams 5 in high purity. Mild cleavage afforded the recovered sultam auxiliary 1 and enantiomerically pure carboxylic acids 7.

  用烷基格氏试剂/ CuCl和水溶液连续处理缀合的N-烯丙基阿磺酰胺2。NH 4 Cl溶液有选择地在C（α）和C（β）处生成两个立体异构中心，经过快速色谱和结晶后，可以提供高纯度的酰基磺酰胺5。温和的裂解得到了回收的杜鹃花助剂1和对映体纯的羧酸7。
• Novel Drugs for Dementia
  申请人：Ternansky Robert

  公开号：US20080227806A1

  公开（公告）日：2008-09-18

  The invention is directed to compounds that are prodrugs containing a chemical delivery system (CDS) moiety and a cysteine protease inhibitor moiety. The CDS moiety targets the prodrug to the brain or central nervous system. The cysteine protease inhibitor inhibits cysteine proteases upon release from the prodrug. Cysteine protease inhibitors are effective for treating dementia, Alzheimer's disease and vascular dementia. Targeting the brain or central nervous system offers significant advantages in treating these conditions and diseases. A preferred CDS prodrug is a dihydrotrigoneline CDS moiety coupled to an epoxysuccinyl peptide cysteine protease inhibitor moiety.

  本发明涉及一种含有化学递送系统（CDS）基团和半胱氨酸蛋白酶抑制剂基团的前药化合物。CDS基团将前药定位于大脑或中枢神经系统。半胱氨酸蛋白酶抑制剂在从前药中释放后抑制半胱氨酸蛋白酶。半胱氨酸蛋白酶抑制剂对治疗痴呆症、阿尔茨海默病和血管性痴呆症有效。定位于大脑或中枢神经系统在治疗这些疾病和症状方面具有显著的优势。首选的CDS前药是将二氢三角线CDS基团与环氧丙酰肽半胱氨酸蛋白酶抑制剂基团耦合。
• ANTIVIRAL COMPOUNDS
  申请人：GILEAD PHARMASSET LLC

  公开号：US20150299213A1

  公开（公告）日：2015-10-22

  The disclosure is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

  本公开涉及抗病毒化合物、含有该类化合物的组合物、包括给予该类化合物的治疗方法，以及用于制备该类化合物的有用过程和中间体。