maleic acid benzyl ester | 13474-68-5

• 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: maleic acid benzyl ester
• 英文别名: monobenzyl maleate；Monobenzylmaleat；benzyl hydrogen maleate；benzyl maleate；Maleinsaeure-monobenzylester；maleic acid monobenzyl ester；(Z)-4-oxo-4-phenylmethoxybut-2-enoic acid
• CAS: 13474-68-5
• 化学式: C₁₁H₁₀O₄
• 分子量: 206.198
• InChiKey: QKUGKZFASYQCGO-SREVYHEPSA-N

物化性质

• 熔点：
  59-60 °C(Solv: hexane (110-54-3))
• 沸点：
  368.4±25.0 °C(Predicted)
• 密度：
  1.2960 g/cm3

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  15
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.09
• 拓扑面积：
  63.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  maleic acid benzyl ester 生成 (3-benzyl-2,5-dioxo-oxazolidin-4-yl)-acetic acid benzyl ester
  参考文献：
  名称：

  SYNTHESES OF ALPHA AMIDE AND PEPTIDE DERIVATIVES OF DL-ASPARTIC ACID

  摘要：

  不可用

  DOI：

  10.1139/v64-186
• 作为产物：
  描述：

  马来酸酐 、 benzyl potassium 在 苯甲醇 作用下， 生成 maleic acid benzyl ester
  参考文献：
  名称：

  Veibel; Pedersen, Acta Chemica Scandinavica (1947), 1955, vol. 9, p. 1674,1678

  摘要：

  DOI：

文献信息

• [EN] CRYSTALLINE FORM OF QUINAPRIL HYDROCHLORIDE AND PROCESS FOR PREPARING THE SAME<br/>[FR] FORME CRISTALLINE D'UN HYDROCHLORURE DE QUINAPRIL ET PROCEDE DE PREPARATION DE CELLE-CI
  申请人：LUPIN LTD

  公开号：WO2004054980A1

  公开（公告）日：2004-07-01

  A novel crystalline form of quinapril hydrochloride of formula (I). An amorphous form of quinapril hydrochloride substantially free of impurities, specially diketopiperazine compound, and conforming to pharmacopoeial specifications formed from the said novel crystalline form of quinapril hydrochloride of formula (I). The crystalline quinapril hydrochloride is in the form nitroalkane solvate in which the nitroalkane is nitromethane, nitroethane and nitropropane. Each such nitroalkane solvate having particular characteristic X- ray diffraction patterns. A process for preparation of amorphous from of quinapril hydrochloride, substantially free of impurities, specially diketopiperazine compound, and conforming to pharmacopoeial specifications, using the novel crystalline quinapril hydrochloride as an intermediate. The process involves obtaining free base compound of formula (V) by adjusting the pH of a solution of the benzyl ester maleate salt of quinapril of formula (V) between 7.5-8.5 in a mixture of water and an organic solvent; catalytic hydrogenation of this compound (V) in an alcoholic solvent in the presence of concentrated hydrochloric acid or hydrogen chloride dissolved in an alcoholic solvent and in the presence of catalytic amounts of Pd/C to obtain a residue containing formula (I); crystallization of the said residue by evaporating the alcoholic solvent from a nitroalkane solvent to give crystalline quinapril hydrochloride, associated with a solvate of the nitroalkane solvent, and drying the crystalline quinapril hydrochloride nitroalkane solvate at a temperature between 40°C and 45°C under vacuum to give amorphous quinapril hydrochloride of formula (I).

  盐酸喹那普利的一种新颖结晶形式，其化学式为(I)。一种基本上无杂质的盐酸喹那普利无定形形式，特别是二酮哌嗪化合物，并且符合药典规格，由所述的盐酸喹那普利新颖结晶形式（化学式为I）形成。该结晶形式的盐酸喹那普利是以硝基烷为溶剂的溶剂化物，其中硝基烷是硝基甲烷、硝基乙烷和硝基丙烷。每一种这样的硝基烷溶剂化物都具有特定的特征X-射线衍射图谱。一种制备基本上无杂质，特别是二酮哌嗪化合物，并符合药典规格的盐酸喹那普利无定形形式的过程，使用新颖的结晶盐酸喹那普利作为中间体。该过程包括通过将喹那普利苯甲基酯马来酸盐（化学式为V）的水和有机溶剂混合溶液的pH值调整在7.5-8.5之间，获得自由碱化合物（化学式为V）；在醇溶剂中对该化合物（V）进行催化氢化，在浓盐酸或溶于醇溶剂中的氯化氢的存在下，以及在Pd/C的催化量存在下，获得含有化学式（I）的残留物；通过从硝基烷溶剂中蒸发醇溶剂使所述残留物结晶，得到与硝基烷溶剂的溶剂化物相关的结晶盐酸喹那普利，并在40°C至45°C的温度下，在真空下干燥结晶盐酸喹那普利硝基烷溶剂化物，得到无定形的盐酸喹那普利（化学式为I）。
• [EN] NOVEL TRANSITION METAL COMPLEXES, THEIR PREPARATION AND USE<br/>[FR] NOUVEAUX COMPLEXES DE MÉTAUX DE TRANSITION, LEUR PRÉPARATION ET UTILISATION
  申请人：LANXESS DEUTSCHLAND GMBH

  公开号：WO2014187973A1

  公开（公告）日：2014-11-27

  Novel transition metal complexes are provided which represent viable catalysts for a broad variety of reactions such as hydrogenation reactions and metathesis reactions. Novel preparation processes are made available via unprecedented routes inter alia not involving structures according to Grubbs I or Grubbs II catalysts.

  提供了新型过渡金属配合物，这些配合物可作为广泛反应的催化剂，如加氢反应和醇醚交换反应。通过前所未有的途径提供了新颖的制备方法，其中不涉及Grubbs I或Grubbs II催化剂的结构。
• Ring-Opening of Cyclic Anhydrides using Ionic Liquids
  作者：Dong Jiang、Yuan Yuan Wang、Yan Nan Xu、Li Yi Dai

  DOI：10.3184/030823409x417298

  日期：2009.3

  Four novel Brønsted acidic ionic liquids with two different acid sites on the imidazolium cations were synthesised and employed as catalysts and solvents for the ring-opening of cyclic anhydrides to synthesise half-esters. The results showed that these novel Brønsted acidic ionic liquids were efficient and recyclable. Good yields, short reaction times and mild reaction conditions were achieved.

  合成了四种新型布氏酸性离子液体，其咪唑阳离子上有两个不同的酸性位点，并将其用作催化剂和溶剂，用于环酐的开环合成半酯。研究结果表明，这些新型布氏酸性离子液体既高效又可回收。反应产率高、反应时间短、反应条件温和。
• [EN] RUTHENIUM-BASED COMPLEX CATALYSTS<br/>[FR] CATALYSEURS COMPLEXES À BASE DE RUTHÉNIUM
  申请人：GOVERNING COUNCIL OF UNIVERSITY OF TORONTO

  公开号：WO2013024119A1

  公开（公告）日：2013-02-21

  The present invention provides novel Ruthenium-based transition metal complex catalysts comprising specific ligands, their preparation and their use in hydrogenation processes. Such complex catalysts are inexpensive, thermally robust, and olefin selective.

  本发明提供了包含特定配体的新型钌基过渡金属配合物催化剂，以及它们的制备和在加氢过程中的应用。这种复杂的催化剂价格低廉、热稳定性强，且对烯烃具有选择性。
• Cyclic bent allene metal complexes
  申请人：THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO

  公开号：EP2949656A1

  公开（公告）日：2015-12-02

  The present invention provides stable, cyclic bent allene metal complexes and methods of conducting chemical processes, preferably olefin hydrogenation, comprising contacting an olefin substrate, preferably an unsaturated polymer, with a cyclic bent allene metal complex as described herein, under hydrogenation conditions. wherein M is a transition metal selected from Groups 6-11 of the periodic table, L1 is a cyclic bent allene ligand according to the general formula (II)

  本发明提供了稳定的、环状的弯曲联苯金属配合物以及进行化学过程的方法，优选烯烃加氢，包括将烯烃底物，优选不饱和聚合物，与本文所述的环状弯曲联苯金属配合物在加氢条件下接触，其中M是周期表第6-11族中选择的过渡金属，L1是符合通用式(II)的环状弯曲联苯配体。