4H-吡喃-2,6-二甲酸 | 23047-07-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃
• 中文名称: 4H-吡喃-2,6-二甲酸
• 中文别名: 4H-吡喃-2,6-二羧酸
• 英文名称: 4H-Pyran-2,6-dicarbonsaeure
• 英文别名: 4H-Pyran-2,6-dicarboxylic Acid
• CAS: 23047-07-6
• 化学式: C₇H₆O₅
• mdl: MFCD20542709
• 分子量: 170.122
• InChiKey: GCWNVFIZNRZKKL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.7
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.142
• 拓扑面积：
  83.8
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  4H-吡喃-2,6-二甲酸 在 sodium carbonate 作用下， 生成 3,4-dihydro-2H-pyran-2,6-dicarboxylic acid
  参考文献：
  名称：

  Czornodola, Roczniki Chemii, 1936, vol. 16, p. 459,463

  摘要：

  DOI：
• 作为产物：
  描述：

  alkaline earth salt of/the/ methylsulfuric acid 在 硫酸 作用下， 生成 4H-吡喃-2,6-二甲酸
  参考文献：
  名称：

  Blaise; Gault, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1904, vol. 139, p. 138

  摘要：

  DOI：

文献信息

• MODIFIER FOR AROMATIC POLYESTER AND AROMATIC POLYESTER RESIN COMPOSITION COMPRISING THE SAME
  申请人：TABATA Masayoshi

  公开号：US20110224343A1

  公开（公告）日：2011-09-15

  The present invention provides a modifier for aromatic polyesters which enhances the melt fluidity of aromatic polyesters without a significant decrease in the heat resistance of the aromatic polyesters, and an aromatic polyester resin composition including the modifier for aromatic polyesters. The present invention relates to a modifier for aromatic polyesters comprising polyhydric phenol residues and residues of aromatic polycarboxylic acid, acid halide or acid anhydride thereof, and the modifier comprises a material having a structure composed of a first residue selected from the group consisting of divalent residues represented by Formula (I): —Ar—W 1 x —Ar— and by Formula (II): —Ar—, the first residues being bonded to two identical or different second residues selected from the group consisting of monovalent residues represented by Formula (III): and monovalent residues represented by Formula (IV): —O—C(O)—R 7 —.

  本发明提供了一种用于芳香族聚酯的改性剂，可以增强芳香族聚酯的熔融流动性，而不明显降低芳香族聚酯的耐热性，以及包括该改性剂的芳香族聚酯树脂组合物。本发明涉及一种用于芳香族聚酯的改性剂，包括多羟基酚残基和芳香族多羧酸、酸卤或其酸酐残基，该改性剂包括具有以下结构的材料：第一残基，选择自由式(I)所代表的二价残基：—Ar—W1x—Ar—和自由式(II)所代表的：—Ar—，第一残基与选择自由式(III)所代表的单价残基：和自由式(IV)所代表的单价残基：—O—C(O)—R7—的两个相同或不同的第二残基结合。
• 一类手性环状化合物及其制备方法与应用
  申请人：中国科学院化学研究所

  公开号：CN114957030B

  公开（公告）日：2023-09-22

  本发明公开了一种手性环状化合物及其制备方法。该化合物如式I所示。本发明提供的手性环状化合物是用红球菌Rhodococcus erythropolis AJ270微生物体系催化水解带有不同取代基的内消旋二酰胺类化合物II得到。所用红球菌菌体用量可根据底物的用量来进行调节。反应溶剂为pH值6.0‑8.0的常用缓冲溶液，温度为20‑37℃，反应时间为0.5‑120小时。该红球菌微生物催化体系具有可发酵培养和保存方便的特点。运用此生物转化制备手性单酰胺羧酸、二羧酸的方法，具有操作简便，反应高效，反应条件温和，对映选择性高，产物易分离，产物纯度高的特点，具有很好的应用前景。#imgabs0#
• AROMATIC POLYESTER
  申请人：Muroran Institute of Technology

  公开号：EP2479203A1

  公开（公告）日：2012-07-25

  The present invention provides an aromatic polyester which is substantially free from the occurrence of coloration and retains significantly high transparency even after being thermally processed at high temperature and which has high flowability. The aromatic polyester contains a polyhydric phenol residue and a residue of any one of aromatic polycarboxylic acid, halide thereof, and anhydride thereof, and terminals of the aromatic polyester have a structure represented by the formula -C(O)-R. The aromatic polyester has an end-capping rate of 90% or higher and a weight average molecular weight (Mw) ranging from 3,000 to 1,000,000.

  本发明提供了一种芳香族聚酯，该聚酯基本上不会发生着色，即使在高温热加工后仍能保持明显的高透明度，并且具有高流动性。芳香族聚酯含有多羟基苯酚残留物和芳香族多羧酸、其卤化物和其酸酐中任意一种的残留物，芳香族聚酯的端基具有式 -C(O)-R 所代表的结构。芳香族聚酯的端盖率为 90% 或更高，重量平均分子量（Mw）为 3,000 至 1,000,000 之间。
• Jones, J. Bryan; Hinks, R. Scott, Canadian Journal of Chemistry, 1987, vol. 65, p. 704 - 708
  作者：Jones, J. Bryan、Hinks, R. Scott

  DOI：——

  日期：——
• NON-LIVING SURROGATE INDICATORS AND METHODS FOR SANITATION VALIDATION
  申请人：THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

  公开号：US20220018836A1

  公开（公告）日：2022-01-20

  Systems, surrogates, indicators and methods for rapid assessment of sanitation processes are provided. Non-living and non-toxic surrogates applied to a platform or encapsulated in a biological material mounted to a platform are exposed to a sanitation process to be evaluated. Responses to sanitation are measured and quantified using FTIR and chemometrics including principal component analysis (PCA), partial least squares regression (PLSR), loading plots and predictive models. An artificial leaf platform with one or more types of surrogates on one surface and an anchor such as an adhesive film on a second surface is described. Surrogate types include nucleic acid, phage, yeast and algae surrogates. Surrogates may also be attached directly or through a polymer to the platform surface. Surrogates may also be encapsulated or attached to the outside of a biological carrier such as a yeast cell that is free or coupled to the platform.