galactonolactone | 2426-46-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: galactonolactone
• 英文别名: fuconolactone；(3R,4S,5S,6R)-3,4,5,6-tetrahydroxyoxepan-2-one
• CAS: 2426-46-2
• 化学式: C₆H₁₀O₆
• 分子量: 178.142
• InChiKey: WTXGYGWMPUGBAL-MGCNEYSASA-N

物化性质

• 物理描述：
  Solid

计算性质

• 辛醇/水分配系数(LogP)：
  -2.6
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  107
• 氢给体数：
  4
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  galactonolactone 在 盐酸 、 一水合肼 作用下， 以 乙醇 为溶剂， 反应 6.0h， 生成 D-galactonic acid thiosemicarbazide
  参考文献：
  名称：

  Precursors for the Synthesis of Substituted 1,3,4-Thiadiazolf, C-Nucleosides, Analogues of Tiazofurin and Related Compounds

  摘要：

  The synthesis of 2-substituted 1,3,4-thiadiazole C-glycosides is described by building a heterocyclic system at the aldehyde end of a series of sugar derivatives. Acid catalyzed dehydration of the polyhydroxylic chain resulted in C-nucleoside, an analogue of tiazofurin.

  DOI：

  10.1080/15257779408009483

文献信息

• CONJUGATE-BASED ANTIFUNGAL AND ANTIBACTERIAL PRODRUGS
  申请人：Bapat Abhijit S.

  公开号：US20140364595A1

  公开（公告）日：2014-12-11

  The invention provides conjugate-based antifungal or antibacterial prodrugs formed by coupling at least one anti-fungal agent or antibacterial agent with at least one linker and/or carrier. The prodrugs are of formula: (i) (AFA) m -X-(L) n ; (ii) [(AFA) m′ -X] p -L; (iii) AFA-[X-(L) n′ ] q ; or (iv) (AFA) m″ -X, wherein: AFA is an antifungal agent or an antibacterial agent; L is a carrier; X is a linker; m ranges from 1 to 10; n ranges from 2 to 10; m′ is 1 to 10; p is 1 to 10; n′ is 1 to 10; and q is 1 to 10, provided that q′ and n are not both 1; and m″ is 1 to 10. The invention also provides nanoparticles comprising the conjugate-based prodrugs. Additionally, the invention also provides non-conjugated antifungal and antibacterial agents in the form of nanoparticles.

  该发明提供了由至少一种抗真菌剂或抗菌剂与至少一种连接剂和/或载体偶联形成的基于共轭的抗真菌或抗菌前药。这些前药的公式为：(i) (AFA) m -X-(L) n ; (ii) [(AFA) m′ -X] p -L; (iii) AFA-[X-(L) n′ ] q ; 或 (iv) (AFA) m″ -X，其中：AFA是抗真菌剂或抗菌剂；L是载体；X是连接剂；m范围从1到10；n范围从2到10；m′为1到10；p为1到10；n′为1到10；q为1到10，前提是q'和n不同时为1；m″为1到10。该发明还提供了包含基于共轭的前药的纳米粒子。此外，该发明还提供了以纳米粒子形式的非共轭抗真菌和抗菌剂。
• Synthesis of beta-L-2'-deoxy nucleosides
  申请人：Storer Richard

  公开号：US20050059632A1

  公开（公告）日：2005-03-17

  An improved process for the preparation of 2′-modified nucleosides and 2′-deoxy-nucleosides, such as, β-L-2′-deoxy-thymidine (LdT), is provided. In particular, the improved process is directed to the synthesis of a 2′-deoxynucleoside that may utilize different starting materials but that proceeds via a chloro-sugar intermediate or via a 2,2′-anhydro-1-furanosyl-nucleobase intermediate. Where an 2,2′-anhydro- 1 -furanosyl base intermediate is utilized, a reducing agent, such as Red-Al, and a sequestering agent, such as 15-crown-5 ether, that cause an intramolecular displacement reaction and formation of the desired nucleoside product in good yields are employed. An alternative process of the present invention utilizes a 2,2′-anhydro-1-furanosyl base intermediate without a sequestering agent to afford 2′-deoxynucleosides in good yields. The compounds made according to the present invention may be used as intermediates in the preparation of other nucleoside analogues, or may be used directly as antiviral and/or antineoplastic agents.

  提供了一种改进的2'-改性核苷和2'-脱氧核苷的制备工艺，例如，β-L-2'-脱氧胸苷（LdT）。特别是，改进的工艺针对的是2'-脱氧核苷的合成，该合成可能使用不同的起始材料，但都通过氯糖中间体或通过2,2'-脱水-1-呋喃糖核苷中间体进行。当使用2,2'-脱水-1-呋喃糖碱基中间体时，会采用还原剂（如Red-Al）和隔离剂（如15-冠-5醚），它们能引起分子内位移反应，并形成所需核苷产品的高收率。本发明的一种替代工艺使用2,2'-脱水-1-呋喃糖碱基中间体而不使用隔离剂，也能以高收率获得2'-脱氧核苷。根据本发明制成的化合物可以作为制备其他核苷类似物的中间体，或者可以直接用作抗病毒和/或抗肿瘤剂。
• Method and product for skin lightening
  申请人：Unilever Home & Personal Care USA, Division of Conopco, Inc.

  公开号：US20030044362A1

  公开（公告）日：2003-03-06

  A method and cosmetic product for lightening skin is provided, the method including wiping the skin with a cosmetic towelette. Impregnated on the towelette is an alpha-hydroxy carboxylic acid or salt thereof and a sunscreen agent.

  提供一种用于美白皮肤的方法和化妆品产品，该方法包括用化妆湿巾擦拭皮肤。湿巾上浸渍有α-羟基羧酸或其盐以及防晒剂。
• METHOD FOR PRODUCING L-FUCOSE
  申请人：Schroven Andreas

  公开号：US20130245250A1

  公开（公告）日：2013-09-19

  Method for producing L-fucose includes in a first aspect, a method for the preparation of L-fucose, wherein L-fucose precursors are produced from pectin and L-fucose is produced from the L-fucose precursors; in a second aspect, a method for the preparation of L-fucose from D-galacturonic acid or a salt thereof, wherein L-fucose precursors are produced from D-galacturonic acid of a salt thereof, and L-fucose is produced from the L-fucose precursors; and an L-fucose precursor as shown in Formula A, wherein R is a linear or branched chain saturated hydrocarbon group with 1-6 carbon atoms, such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, t-butyl, n-hexyl, etc., preferably a methyl group.

  生产L-岩藻糖的方法包括第一方面，一种制备L-岩藻糖的方法，其中L-岩藻糖前体从果胶中产生，并且L-岩藻糖从L-岩藻糖前体中产生；第二方面，一种从D-半乳糖酸或其盐制备L-岩藻糖的方法，其中L-岩藻糖前体从D-半乳糖酸或其盐中产生，并且L-岩藻糖从L-岩藻糖前体中产生；以及如公式A所示的L-岩藻糖前体，其中R是线性或支链饱和碳原子数为1-6的烷基羟基烃基，例如甲基、乙基、正丙基、异丙基、正丁基、异丁基、正丁基、叔丁基、正己基等，最好是甲基。
• PROCESS FOR PREPARATION OF ALDONIC ACIDS AND DERIVATIVES THEREOF
  申请人：Weymouth-Wilson Alexander Charles

  公开号：US20090112002A1

  公开（公告）日：2009-04-30

  A process for the preparation of L-gluconic acid or a salt thereof, comprises treating an aqueous solution of 6-bromo-6-deoxy-2,3-anhydro-D-manno-1,4-lactone with a base at a pH of at least 12 and at a temperature of 45 to 55° C. to obtain an aqueous solution of L-gluconic acid.

  一种制备L-葡萄糖酸或其盐的方法，包括将6-溴-6-去氧-2,3-脱水-D-曼诺-1,4-内酯的水溶液在pH至少为12且温度为45至55°C的条件下与碱处理，以获得L-葡萄糖酸的水溶液。