benzyl (+/-)-tetrahydrofuran-2-carboxylate | 78277-21-1

• 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: benzyl (+/-)-tetrahydrofuran-2-carboxylate
• 英文别名: 2-Furancarboxylic acid, tetrahydro-, phenylmethyl ester；benzyl oxolane-2-carboxylate
• CAS: 78277-21-1
• 化学式: C₁₂H₁₄O₃
• mdl: MFCD26391036
• 分子量: 206.241
• InChiKey: BDLCAVORXGWRJK-UHFFFAOYSA-N

物化性质

• 沸点：
  135-136 °C(Press: 0.3 Torr)
• 密度：
  1.158±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.416
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  benzyl (+/-)-tetrahydrofuran-2-carboxylate 在 palladium on activated charcoal 四丁基氟化铵 、 benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、 氢气 、 三乙胺 、 N,N-二异丙基乙胺 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 甲醇 、 六甲基磷酰三胺 、 二氯甲烷 为溶剂， 生成 (S)-3-(2',6'-Dimethoxy-biphenyl-4-yl)-2-{[2-(2-methoxy-ethyl)-tetrahydro-furan-2-carbonyl]-amino}-propionic acid tert-butyl ester
  参考文献：
  名称：

  Substituted tetrahydrofuroyl-1-phenylalanine derivatives as potent and specific VLA-4 antagonists

  摘要：

  A series of substituted tetra hydrofuroyl-1-phenylalanine derivatives was prepared and evaluated as VLA-4 antagonists. Substitution of the a carbon of the tetrahydrofuran with aryl groups increased the specificity for VLA-4 versus alpha(4)beta(7) while amide substitution increased the potency of the series without increasing the specificity. Substitution of the P carbon of the tetrahydrofuran with keto or amino groups slightly improved the specificity for VLA-4 versus alpha(4)beta(7) but with a significant loss in binding affinity for VLA-4. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0960-894x(02)00211-1
• 作为产物：
  描述：

  2-四氢呋喃甲酸 在 吡啶 、 草酰氯 作用下， 以 乙醚 为溶剂， 反应 15.67h， 生成 benzyl (+/-)-tetrahydrofuran-2-carboxylate
  参考文献：
  名称：

  杂环非离子X射线造影剂V：2-四氢呋喃酰胺轻松转化为α-羟基-δ-戊内酰胺和与2,4,6-三碘间苯二甲酰胺共轭的内酰胺的一般合成

  摘要：

  描述了被内酰胺​​部分取代的2,4,6-三碘间苯二甲酰胺的合成。串联开环开环方法由四氢呋喃苯胺14b的区域特异性醚裂解，然后内酰胺化为α-氧化的酸酐15b或16b组成，分别得到α-O-官能化的δ-戊内酰胺12b或13b。该方法也与三碘苯基部分上酯和羰基氯官能团的存在兼容。还实现了内酰胺34–39的一般合成。进一步的化学修饰导致了水溶性的未取代内酰胺（34d，35d，37d）和α-羟基内酰胺[ 42（d，e），13（d，e）作为X射线造影剂而感兴趣的是图43和43 ]。

  DOI：

  10.1016/0040-4020(96)00668-0

文献信息

• Direct ester condensation from a 1:1 mixture of carboxylic acids and alcohols catalyzed by hafnium(IV) or zirconium(IV) salts
  作者：Kazuaki Ishihara、Masaya Nakayama、Suguru Ohara、Hisashi Yamamoto

  DOI：10.1016/s0040-4020(02)00966-3

  日期：2002.10

  either carboxylic acids or alcohols are normally needed. We found that the direct condensation of equimolar amounts of carboxylic acids and alcohols could be achieved using hafnium(IV) or zirconium(IV) salts. These metal salts are highly effective as catalysts for the selective esterification of primary alcohols with carboxylic acids in the presence of secondary alcohols or aromatic alcohols. The present

  为了提高合成中的原子效率并避免产生环境废物，应避免使用化学计量的缩合试剂或过量的底物。在酯化中，通常需要过量的羧酸或醇。我们发现，使用ha（IV）或锆（IV）盐可以实现等摩尔量的羧酸和醇类的直接缩合。这些金属盐在仲醇或芳族醇的存在下作为伯醇与羧酸选择性酯化的催化剂非常有效。本发明的方法可以用于直接聚酯化并且可以适用于大规模操作。
• Efficient Method for the Preparation of Carboxylic Acid Alkyl Esters or Alkyl Phenyl Ethers by a New-Type of Oxidation–Reduction Condensation Using 2,6-Dimethyl-1,4-benzoquinone and Alkoxydiphenylphosphines
  作者：Taichi Shintou、Wataru Kikuchi、Teruaki Mukaiyama

  DOI：10.1246/bcsj.76.1645

  日期：2003.8

  A new-type of oxidation–reduction condensation proceeded smoothly to afford carboxylic acid alkyl esters or alkyl phenyl ethers in good to high yields by combined use of alkoxydiphenylphosphines (1...

  一种新型氧化还原缩合反应顺利进行，通过结合使用烷氧基二苯基膦（1...
• Nonionic radiographic contrast agents
  申请人：Bracco International B.V.

  公开号：US05614638A1

  公开（公告）日：1997-03-25

  New nonionic radiographic contrast agents having the formula ##STR1## wherein Y is a single bond, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, ##STR2## --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, --O-- or ##STR3## R.sub.1, R.sub.1 ' and R.sub.2 are the same or different and are hydrogen, alkyl or hydroxyalkyl. Hydroxyalkyl refers to such alkyl groups having 1 or more hydroxy groups. Preferred hydroxyalkyl groups include: ##STR4## R.sub.3 and R.sub.4 are the same or different and are hydrogen, methyl or --CH.sub.2 CH.sub.2 OH; R.sub.5 is hydrogen, alkyl, --CH.sub.2 CH.sub.2 OH, CH.sub.2 OH or OH and R.sub.6 is alkyl, --CH.sub.2 CH.sub.2 OH, CH.sub.2 OH, OH or hydrogen and may be the same or different than R.sub.5 and m is zero or one, with the proviso that no methylene or methine carbon atom of the heterocyclic ring is attached to both a nitrogen and an oxygen atom with the additional proviso that when Y is a single bond, m is not zero. These new contrast agents are water soluble and have desirable low osmolality and anticoagulant properties.

  新的非离子X线造影剂具有以下结构式：##STR1## 其中Y是单键，--CH.sub.2 CH.sub.2 --，--CH.sub.2 O--，--OCH.sub.2 --，##STR2## --CH.sub.2 --，--CH.sub.2 --CH.sub.2 --CH.sub.2 --，--O--或##STR3## R.sub.1，R.sub.1'和R.sub.2相同或不同，可以是氢，烷基或羟基烷基。羟基烷基指的是具有1个或更多羟基的烷基基团。首选的羟基烷基基团包括：##STR4## R.sub.3和R.sub.4相同或不同，可以是氢，甲基或--CH.sub.2 CH.sub.2 OH；R.sub.5是氢，烷基，--CH.sub.2 CH.sub.2 OH，CH.sub.2 OH或OH，R.sub.6是烷基，--CH.sub.2 CH.sub.2 OH，CH.sub.2 OH，OH或氢，可能与R.sub.5不同，m为零或一，但条件是杂环环的亚甲基或亚甲烷碳原子不同时连接到氮和氧原子，另外条件是当Y是单键时，m不为零。这些新的造影剂可溶于水，具有理想的低渗透压和抗凝血性能。
• Zr(IV)Fe(III), Ga(III), and Sn(IV) Binary Metal Complexes as Synergistic and Reusable Esterification Catalysts
  作者：Atsushi Sato、Yuka Nakamura、Toshikatsu Maki、Kazuaki Ishihara、Hisashi Yamamoto

  DOI：10.1002/adsc.200505083

  日期：2005.8

  activity with the combined use of Hf(O-i-Pr)4 or Zr(O-i-Pr)4 and Fe(O-i-Pr)3 for direct esterification and a very simple method for their extraction with ionic liquids for their recovery and reuse are described. This Zr(IV)Fe(III) complex is an environmentally benign catalyst due to its high turnover number, extremely mild Lewis acidity, low toxicity, reusability, and commercial availability at low cost.

  结合使用Hf（O- i- Pr）4或Zr（O- i- Pr）4和Fe（O- i- Pr）3进行直接酯化的催化活性和一种非常简单的提取方法描述了用于回收和再利用的离子液体。这种Zr（IV）Fe（III）络合物具有高周转率，极弱的路易斯酸度，低毒性，可重复使用性以及低成本的商业可用性，因此对环境无害。
• Contrast media
  申请人：Amersham Health AS

  公开号：US06448442B1

  公开（公告）日：2002-09-10

  The invention provides low viscosity iodinated aryl compounds, useful as X-ray contrast agents of formula I wherein n is 0 or 1, and where n is 1 each C6R5 moiety may be the same or different; X denotes a bond or a group providing a 1 to 7 atom chain linking two C6R5 moieties or, where n is 0, X denotes a group R; each group R is a hydrogen atom, an iodine atom or a hydrophilic moiety M or M1, two or three non-adjacent R groups in each C6R5 moiety being iodine and at least one R group in each C6R5 moiety being an M or M1 moiety; each M which may be the same or different, is a non-ionic hydrophilic moiety; and each M1 independently represents a —CHOHCON(R1)2 group wherein each R1, which may be the same or different, is a hydrogen atom, an OH group or a C1-6 alkoxy or optionally hydroxylated C1-5 alkyl group; at least one R group in the molecule being an M1 moiety; and isomers thereof.

  该发明提供了低粘度碘化芳基化合物，作为公式I的X射线造影剂，其中n为0或1，当n为1时，每个C6R5基团可以相同也可以不同；X表示连接两个C6R5基团的1至7个原子链的键或基团，或者当n为0时，X表示基团R；每个基团R是氢原子、碘原子或亲水基团M或M1，每个C6R5基团中的两个或三个非相邻的R基团为碘，且每个C6R5基团中至少一个R基团为M或M1基团；每个M可以相同也可以不同，是非离子性亲水基团；每个M1独立地表示一个—CHOHCON(R1)2基团，其中每个R1可以相同也可以不同，是氢原子、羟基或C1-6烷氧基或选择性羟基化的C1-5烷基基团；分子中至少一个R基团为M1基团；以及其异构体。