tert-butyl 4-oxo-4-(o-tolyl)butanoate | 170282-44-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tert-butyl 4-oxo-4-(o-tolyl)butanoate
• 英文别名: t-Butyl 4-(2-methylphenyl)-4-oxobutanoate；tert-butyl 4-(2-methylphenyl)-4-oxobutanoate
• CAS: 170282-44-7
• 化学式: C₁₅H₂₀O₃
• 分子量: 248.322
• InChiKey: HYMMRGRTZAUMRA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  18
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  tert-butyl 4-oxo-4-(o-tolyl)butanoate 在 sodium hydroxide 、 sodium hydride 、 二乙醇胺 、 (+)-二异松蒎基氯硼烷 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 为溶剂， 反应 72.0h， 生成 (R)-4-[5-(Benzo[1,3]dioxol-5-ylmethoxy)-2-cyano-phenoxy]-4-o-tolyl-butyric acid
  参考文献：
  名称：

  Selective Endothelin A Receptor Antagonists. 3. Discovery and Structure−Activity Relationships of a Series of 4-Phenoxybutanoic Acid Derivatives

  摘要：

  The third in this series of papers describes our further progress into the discovery of a potent and selective endothelin A (ETA) receptor antagonist for the potential treatment of diseases in which a pathophysiological role for endothelin has been implicated. These include hypertension, ischemic diseases, and atherosclerosis. In earlier publications we have outlined the discovery and structure-activity relations of two moderately potent series of nonpeptide ETA receptor antagonists. In this paper, we describe how a pharmacophore model for ETA receptor binding was developed which enabled these two series of compounds to be merged into a single class of 4-phenoxybutanoic acid derivatives. The subsequent optimization of in vitro activity against the ETA receptor led to the discovery of (R)-4-[2-cyano-5-(3-pyridylmethoxy)phenoxy]-4-(2-methylphenyl)butanoic acid (12m). This compound exhibits low-nanomolar binding to the ETA receptor and a greater than 1000-fold selectivity over the ETB receptor. Data are presented to demonstrate that 12m is orally bioavailable in the rat and is a functional antagonist in vitro and in vivo of ET-1-induced vasoconstriction.

  DOI：

  10.1021/jm9707131
• 作为产物：
  描述：

  O-甲苯基氯化镁 在 硫酸 、 叔丁醇 作用下， 以 二氯甲烷 、 甲苯 为溶剂， 反应 10.0h， 生成 tert-butyl 4-oxo-4-(o-tolyl)butanoate
  参考文献：
  名称：

  Selective Endothelin A Receptor Antagonists. 3. Discovery and Structure−Activity Relationships of a Series of 4-Phenoxybutanoic Acid Derivatives

  摘要：

  The third in this series of papers describes our further progress into the discovery of a potent and selective endothelin A (ETA) receptor antagonist for the potential treatment of diseases in which a pathophysiological role for endothelin has been implicated. These include hypertension, ischemic diseases, and atherosclerosis. In earlier publications we have outlined the discovery and structure-activity relations of two moderately potent series of nonpeptide ETA receptor antagonists. In this paper, we describe how a pharmacophore model for ETA receptor binding was developed which enabled these two series of compounds to be merged into a single class of 4-phenoxybutanoic acid derivatives. The subsequent optimization of in vitro activity against the ETA receptor led to the discovery of (R)-4-[2-cyano-5-(3-pyridylmethoxy)phenoxy]-4-(2-methylphenyl)butanoic acid (12m). This compound exhibits low-nanomolar binding to the ETA receptor and a greater than 1000-fold selectivity over the ETB receptor. Data are presented to demonstrate that 12m is orally bioavailable in the rat and is a functional antagonist in vitro and in vivo of ET-1-induced vasoconstriction.

  DOI：

  10.1021/jm9707131

文献信息

• Acyl Radicals from α-Keto Acids Using a Carbonyl Photocatalyst: Photoredox-Catalyzed Synthesis of Ketones
  作者：Da-Liang Zhu、Qi Wu、David James Young、Hao Wang、Zhi-Gang Ren、Hong-Xi Li

  DOI：10.1021/acs.orglett.0c02351

  日期：2020.9.4

  Acyl radicals have been generated from α-keto acids using inexpensive and commercially available 2-chloro-thioxanthen-9-one as the photoredox catalyst under visible light illumination. These reactive species added to olefins or coupled with aryl halides via a bipyridyl-stabilized Ni(II) catalyst, enabling easy access to a diverse range of ketones. This reliable, atom-economical, and eco-friendly protocol

  在可见光照射下，使用廉价且可商购的2-氯-噻吨酮-9-作为光氧化还原催化剂，已由α-酮酸生成了酰基基团。这些反应性物质通过联吡啶基稳定的Ni（II）催化剂添加到烯烃中或与芳基卤化物偶合，可轻松获得各种酮。这种可靠，原子经济且环保的协议可与多种官能团兼容。
• Direct Synthesis of Chiral NH Lactams via Ru-Catalyzed Asymmetric Reductive Amination/Cyclization Cascade of Keto Acids/Esters
  作者：Yongjie Shi、Xuefeng Tan、Shuang Gao、Yao Zhang、Jingxin Wang、Xumu Zhang、Qin Yin

  DOI：10.1021/acs.orglett.0c00669

  日期：2020.4.3

  medicinal agents and bioactive alkaloids. Herein we report a broadly applicable synthesis of enantioenriched NH lactams through a one-pot asymmetric reductive amination/cyclization sequence of easily available keto acids/esters. Such cascade processes alleviate the demand for protecting group manipulations as well as intermediate purification. This strategy is capable of constructing enantioenriched lactams

  在许多药物和生物活性生物碱中都存在具有与N原子相邻的立构中心的内酰胺。本文中，我们通过易于获得的酮酸/酯的一锅不对称还原胺化/环化序列，报道了广泛应用的对映体富集的NH内酰胺的合成。这样的级联过程减轻了对保护基团操纵以及中间纯化的需求。该策略能够以通常的高收率和优异的对映选择性（高达97％ee）构建五，六或七元环的对映体富集的内酰胺和苯并内酰胺。关键药物中间体的可扩展且简洁的合成方法进一步显示了这种方法的重要性。
• Copper-Catalyzed Synthesis of γ-Amino Acids Featuring Quaternary Stereocenters
  作者：José Enrique Gómez、Wusheng Guo、Silvia Gaspa、Arjan W. Kleij

  DOI：10.1002/anie.201709511

  日期：2017.11.20

  Open sesame: The first general asymmetric synthesis of γ,γ-disubstituted γ-amino acids by copper-catalyzed ring opening of nonstrained lactones with amines is reported. This catalytic system allows the synthesis of a series of highly functionalized γ-amino acids, featuring quaternary stereocenters, with excellent enantiomeric ratios of up to 98:2 and yields of up to 98 %.

  开孔芝麻：报道了通过铜催化非应变内酯与胺的开环反应，首次普遍不对称合成γ，γ-二取代的γ-氨基酸。该催化系统可以合成具有季立体中心的一系列高度官能化的γ-氨基酸，对映体比率高达98：2，产率高达98％。
• Substituted phenyl compounds
  申请人：Rhone-Poulenc Rorer Limited

  公开号：US06211234B1

  公开（公告）日：2001-04-03

  Compounds of formula (I) are described wherein R1 is hydrogen, -(lower alkyl)q(CO2R6 or OH), —CN, —C(R7)═NOR8, NO2, —O(lower alkyl)R9, —C≡C—R10, —CR11═C(R12)(R13), —C(═O)CH2C(═O)CO2H, —CO(R14), alkylthio, alkylsulphinyl, alkylsulphonyl, carbamoyl, thiocarbamoyl, substituted carbamoyl, substituted thiocarbamoyl, sulphamoyl or an optionally substituted nitrogen-containing ring, m, n, o and p are independently zero or 1 and R2, R3, R4 and R5 are various groups; and physiologically acceptable salts, N-oxides and prodrugs thereof. The compounds have endothelin antagonist activity and are useful as pharmaceuticals.

  式(I)的化合物描述如下，其中R1为氢，-(较低烷基)q(CO2R6或OH)，—CN，—C(R7)HNOR8，NO2，—O(较低烷基)R9，—C≡C—R10，—CR11CH(R12)(R13)，—C(O)CH2C(O)CO2H，—CO(R14)，烷基硫醚，烷基亚砜基，烷基磺酰基，氨基甲酰基，硫代氨基甲酰基，取代的氨基甲酰基，取代的硫代氨基甲酰基，磺酰胺基或可选择取代的含氮环，m、n、o和p独立地为零或1，R2、R3、R4和R5为各种基团；以及其生理学上可接受的盐、N-氧化物和前药。这些化合物具有内皮素拮抗活性，并可用作药物。
• Chemoselectivity Control in the Asymmetric Hydrogenation of γ- and δ-Keto Esters into Hydroxy Esters or Diols
  作者：Noriyoshi Arai、Takanori Namba、Kei Kawaguchi、Yuki Matsumoto、Takeshi Ohkuma

  DOI：10.1002/anie.201711363

  日期：2018.1.26

  The reactivity of the ester group was notably dependent on the length of the carbon spacer between the two carbonyl moieties of the substrate. The reaction of β‐ and ϵ‐keto esters selectively afforded the hydroxy esters regardless of the reaction conditions. This catalyst system was applied to the enantioselective and regioselective (for one of the two ester groups) hydrogenation of a γ‐ϵ‐diketo diester

  研究了在新型DIPSkewphos / 3-AMIQ-Ru II配合物的催化下芳族γ-和δ-酮酯的不对称氢化为旋光羟基酯或二醇。在最佳条件下（8 atm H 2  ，Ru络合物/ t- C 4 H 9 OK = 1：3.5，25°C），用97–99定量获得了γ-和δ-羟基酯（包括γ-内酯）。 ％  ee。当反应在某些苛刻的条件下（20 atm H 2  ，[ t -C 4 H 9 OK] = 50 m m，40°C）进行时，得到的1,4-二醇和1,5-二醇主要是95 –99％  ee。酯基的反应性特别取决于底物的两个羰基部分之间的碳间隔基的长度。不论反应条件如何，β-和β-酮酸酯的反应选择性地提供羟基酯。该催化剂体系用于γ-ϵ-二酮二酯加氢成三羟基酯的对映选择性和区域选择性（对于两个酯基之一）。