(+/-)-4-(2-Tetrahydropyranyloxy)-2-cyclopentenone | 70615-05-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氧烷类
• 英文名称: (+/-)-4-(2-Tetrahydropyranyloxy)-2-cyclopentenone
• 英文别名: 4R*S*-4-(2'R*-tetrahydropyranyloxy)-2-cyclopentenone；dl-4-tetrahydropyranoxy-2-cyclopentenone；4-((tetrahydro-2H-pyran-2-yl)oxy)cyclopent-2-en-1-one；4-(tetrahydro-pyran-2-yloxy)-cyclopent-2-enone；(R)-4-(tetrahydropyranyloxy)-cyclopent-2-en-1-one；4-(2-tetrahydropyranyloxy)cyclopent-2-en-1-one；4-(tetrahydropyran-2-yloxy)-2-cyclopentenone；4-(oxan-2-yloxy)cyclopent-2-en-1-one
• CAS: 70615-05-3
• 化学式: C₁₀H₁₄O₃
• 分子量: 182.219
• InChiKey: KNDDEJNSZWCUJL-UHFFFAOYSA-N

物化性质

• 沸点：
  316.1±42.0 °C(Predicted)
• 密度：
  1.13±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  13
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.7
• 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：

  (+/-)-4-(2-Tetrahydropyranyloxy)-2-cyclopentenone 在 sodium hydroxide 、 lithium iodide 作用下， 以 甲基叔丁基醚 、 甲苯 为溶剂， 以73%的产率得到(1R,4S)-4-[(RS)-(tetrahydropyran-2-yl)oxy]cyclopent-2-en-1-ol
  参考文献：
  名称：

  Preparation of cis-4-O-protected-2-cyclopentenol derivatives

  摘要：

  本发明涉及一种制备顺式-4-O-保护取代-2-环戊烯醇衍生物的新方法，包括以下步骤：a) 将4-O-保护的2-环戊烯酮溶解于适宜的有机溶剂中；b) 在约-100°C至约20°C的温度下，向该溶液中加入适宜的路易斯酸和适宜的还原剂。顺式-4-O-保护取代-2-环戊烯醇衍生物是制备各种环戊基和环戊烯基嘌呤类似物的有用中间体，这些类似物可作为免疫抑制剂，并用于制备各种前列腺素。

  公开号：

  US05728899A1
• 作为产物：
  描述：

  dl-cis-4-hydroxy-2-cyclopentenyl benzoate 在 barium dihydroxide 、 jones reagent 、 对甲苯磺酸 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 丙酮 为溶剂， 反应 12.0h， 生成 (+/-)-4-(2-Tetrahydropyranyloxy)-2-cyclopentenone
  参考文献：
  名称：

  立体化学研究-LVII 1：通过新型使用内消旋化合物合成旋光化合物-1。两种结构类型的光学纯前列腺素中间体的有效合成

  摘要：

  为了克服制备旋光化合物的常规方法的几个低效率方面，我们开发了一种新方法，该方法建议使用对称官能化的内消旋化合物代替外消旋化合物。

  DOI：

  10.1016/0040-4020(80)80160-8

文献信息

• Hydroxylation of prostanoids by fungi. Synthesis of (−)-15-deoxy-19-(<i>R</i>)-hydroxy-PGE₁ and (−)-15-deoxy-18-(<i>S</i>)-hydroxy-PGE₁
  作者：Herbert L. Holland、Frances M. Brown、P. Chinna Chenchaiah、J. Appa Rao

  DOI：10.1139/v90-039

  日期：1990.2.1

  A series of racemic substituted cyclopentanones, with alkyl groups corresponding to the upper prostanoid side chain and (or) the lower prostanoid side chain without the C-15 alcohol, has been synthesized. Using a steroid template for the prostanoid molecule as a basis for selection, fungi capable of hydroxylating steroids have been used to biotransform the prostanoid substrates. The predominant products were hydroxylated at the prostanoid C-18 and C-19 positions. The hydroxylations were enantioselective, with excesses in the range 10–60%, and in most cases the predominant configuration corresponded to that of the natural prostanoids. The stereochemistry of the C-19 hydroxyl group was found to be R by degradation of products to methyl 6-acetoxyheptanoate and comparison of that material with a resolved sample, obtained via crystallization of the brucine salt of ethyl 6-phthaloxyheptanoate. Hydroxylation at C-18 gave the S configuration of alcohol. Hydroxylation at prostanoid C-15 was observed, but in all cases this was accompanied by other reactions. Hydroxylation of Rhizopusarrhizus has been used in a preparation of (−)-15-deoxy-19-(R)-hydroxy-PGE₁ and (−)-15-deoxy-18-(S)-hydroxy-PGE₁. Keywords: biotransformation, hydroxylation, prostaglandins, prostanoids.

  一系列的消旋取代环戊酮已经合成，其中烷基基团对应于上前列腺素侧链和（或）下前列腺素侧链，没有C-15醇基。利用类固醇模板作为前列腺素分子的选择基础，能够羟化类固醇的真菌被用来生物转化前列腺素底物。主要产物在前列腺素C-18和C-19位置发生了羟基化。羟基化是对映选择性的，过量在10-60%范围内，大多数情况下，主要构型与天然前列腺素相对应。发现C-19羟基的立体化学为R，通过将产物降解为甲基6-乙酰氧基庚酸酯，并将该物质与通过结晶乙酸乙酯6-邻苯二甲酰氧基庚酸盐的可分离样品进行比较。C-18的羟基化给出了S构型的醇。观察到前列腺素C-15的羟基化，但在所有情况下，这都伴随着其他反应。利用根霉菌的羟基化制备了（-）-15-去氧-19-(R)-羟基-PGE1和（-）-15-去氧-18-(S)-羟基-PGE1。关键词：生物转化、羟基化、前列腺素、前列腺素。
• The preparation of optically active 2-cyclopenten-1,4-diol derivatives from furfuryl alcohol
  作者：Timothy T. Curran、David A. Hay、Christopher P. Koegel、Jonathan C. Evans

  DOI：10.1016/s0040-4020(96)01169-6

  日期：1997.2

  The preparation and enzymatic resolution of several cis-mono-4-O-protected-2-cyclopenten-1,4-diols are described. The process starts with inexpensive furfuryl alcohol and lends itself to the preparation of multigram quantities of various protected, optically active 2-cyclopenten-1,4-diol derivatives. Stereoselective reduction of 4-O-protected-2-cyclopentenone to the cis-mono-O-protected-2-cyclopenten-1

  描述了几种顺式-单-4- O-保护的-2-环戊烯-1,4-二醇的制备和酶促拆分。该方法开始于廉价的糠醇，并有助于制备数克量的各种受保护的旋光性2-环戊烯-1,4-二醇衍生物。描述了使用或将4- O-保护的2-环戊烯酮立体选择性地还原为顺-单-O-保护的-2-环戊烯-1，4-二醇。随后对这些顺式-（+/-）-mono- O进行了胰酶促进的立体选择性酰化反应-经保护的环戊烯-1,4-二醇得到中等至极好的对映选择性的相应醇和乙酸酯。
• Antibiotic
  申请人：Takeda Chemical Industries, Ltd.

  公开号：US04851422A1

  公开（公告）日：1989-07-25

  The compound represented by the formula: ##STR1## where R.sup.1 stands for amino or an organic residue bonded through nitrogen; R.sup.2 stands for carboxyl or a group derivable therefrom; R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 independently stand for hydrogen or an organic residue, including the case where R.sup.5 or R.sup.6 forms a chemical bond or a ring with R.sup.7 or R.sup.8 ; X stands for hydrogen, methoxy or formylamino; or a salt thereof, produceable by the present method, exhibits excellent antimicrobial activity, and is utilized as antimicrobial agents.

  该化合物由以下结构式表示：##STR1## 其中，R1代表氨基或通过氮原子连接的有机残基；R2代表羧基或由此衍生的基团；R3、R4、R5、R6、R7和R8各自独立地代表氢或有机残基，包括R5或R6与R7或R8形成化学键或环的情况；X代表氢、甲氧基或甲酰氨基；或其盐，可通过本方法制备，表现出优异的抗菌活性，并被用作抗菌剂。
• 2-Organothio-2-cyclopentenones, organothio-cyclopentanes derived
  申请人：Teijin Limited

  公开号：US04180672A1

  公开（公告）日：1979-12-25

  Organothiocyclopentanes of the formula ##STR1## wherein E represents >C.dbd.O or ##STR2## in which Z' represents a hydrogen atom, a hydroxyl group or a protected hydroxyl group; X represents --S--, --CH.sub.2 --, --CH.dbd.; represents a single or double bond; R' represents a monovalent or divalent organic group containing 1 to 25 carbon atoms; R represents a monovalent organic group containing 1 to 25 carbon atoms; Z represents a hydrogen atom, a hydroxyl group or a protected hydroxyl group; and when both E and Z represent a hydroxyl group or a protected hydroxyl group, X represents --S--. Also, 2-organothio-2-cyclopentenones of the formula ##STR3## wherein R and Z are as defined above. The compounds of formula (I) are prepared by reacting 2,3-epoxy-cyclopentanone or its derivatives with mercaptans in the presence of basic compounds. The compounds of formula (II) are prepared by reacting the compounds of formula (I) with mercaptans or organocopper-lithium compounds, and optionally reducing the resulting products, and optionally protecting the hydroxyl group at their cyclopentane ring. The compounds of formula (I) have an action of inhibiting ulcer formation, and are useful intermediates for the compounds of formula (II). The compounds of formula (II) are monothia- or dithia-prostanoic acid derivatives, and exhibit various superior pharmacological actions.

  公式为##STR1##的有机硫代环戊烷，其中E代表>C.dbd.O或##STR2##，其中Z'代表氢原子、羟基或受保护的羟基；X代表--S--、--CH.sub.2--、--CH.dbd.--；代表单键或双键；R'代表含有1至25个碳原子的一价或二价有机基团；R代表含有1至25个碳原子的一价有机基团；Z代表氢原子、羟基或受保护的羟基；当E和Z均代表羟基或受保护的羟基时，X代表--S--。此外，公式为##STR3##的2-有机硫代-2-环戊烯酮，其中R和Z如上定义。通过将2,3-环氧-环戊酮或其衍生物与巯基化合物在碱性化合物存在下反应制备公式(I)的化合物。通过将公式(I)的化合物与巯基化合物或有机铜锂化合物反应，并可选择性地还原所得产物，并可选择性地保护其环戊烷环上的羟基来制备公式(II)的化合物。公式(I)的化合物具有抑制溃疡形成的作用，并可用作公式(II)的化合物的有用中间体。公式(II)的化合物是单硫代或二硫代前列腺酸衍生物，并表现出各种优越的药理作用。
• Metal-free transfer hydrochlorination of internal C–C triple bonds with a bicyclo[3.1.0]hexane-based surrogate releasing two molecules of hydrogen chloride
  作者：Andreas J. Weidkamp、Martin Oestreich

  DOI：10.1039/d1cc06591b

  日期：——

  The development and application of a transfer hydrochlorination reagent based on a trichlorinated bicyclo[3.1.0]hexane core that transfers two molecules of HCl per molecule of surrogate to a π-basic substrate under B(C6F5)3 catalysis is reported. Lewis acid-assisted chloride abstraction followed by thermal electrocyclic cyclopropyl-to-allyl cation ring opening releases ring strain as a previously unexploited

  报道了基于三氯化双环[3.1.0]己烷核心的转移氢氯化试剂的开发和应用，该试剂在B(C 6 F 5 ) 3催化下将每个替代物分子中的两个HCl分子转移到π-碱性底物上。路易斯酸辅助氯化物提取，然后是热电环丙基到烯丙基阳离子开环释放环应变作为以前未开发的驱动力。