6-cyano-2,2-dimethylchromene-3,4-epoxide

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 6-cyano-2,2-dimethylchromene-3,4-epoxide
• 英文别名: (1aS,7bS)-2,2-dimethyl-2,7b-dihydro-1aH-oxireno[2,3-c]chromene-6-carbonitrile；(3S,4S)-3,4-Epoxy-6-cyano-2,2-dimethylchroman；(3S,4S)-6-cyano-3,4-epoxy-2,2-dimethylchromene；(1aS,7bS)-2,2-Dimethyl-1a,7b-dihydro-2H-oxireno[2,3-c]chromene-6-carbonitrile；(1aS,7bS)-2,2-dimethyl-1a,7b-dihydrooxireno[2,3-c]chromene-6-carbonitrile
• 化学式: C₁₂H₁₁NO₂
• 分子量: 201.225
• InChiKey: HCYIWPLDKSWKGY-QWRGUYRKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  15
• 可旋转键数：
  0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  45.6
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  6-cyano-2,2-dimethylchromene-3,4-epoxide 在 ammonium hydroxide 、 二乙胺基三氟化硫 、 potassium carbonate 、 苯硫酚 、 三乙胺 、 sodium iodide 作用下， 以 四氢呋喃 、 乙醇 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 73.0h， 生成 (4aR,10bR)-5,5-dimethyl-1,2,3,4a,5,10b-hexahydro-[1]benzopyrano[3,4-b][1,4]oxazine-9-carbonitrile
  参考文献：
  名称：

  N -Acyl-1,2,3,4a,5,10b-hexahydro-[1]benzopyrano-[3,4- b ][1,4]oxazine-9-carbonitriles as bladder-selective potassium channel openers

  摘要：

  Optically active N-acyl-5,5-dimethyl-1,2,3,4a,5,10b-hexahydro-[1]benzopyrano[3,4-b][1,4]oxazine-9-carbonitriles 2-22 were synthesized as rigid analogues of cromakalim. The (4aR,10br)-N-benzoyl derivative (-)-11 was identified as a bladder-selective KCO (IC50, (bladder) = 82 muM, IC50, (portal vein) = 34.5 muM). Among the analogues of 11 with substitution on the benzoyl moiety, the 3-methyl analogue (-)-14 showed highly potent and selective activity at portal vein (IC50, (bladder) = 279 muM, IC50, (portal vein) = 0.54 muM). The 4-bromo analogue (-)-19 (IC50, (bladder) = 2.0 muM, IC50, (portal vein) = 8.1 muM) and the 4-hydroxy analogue (-)-21 (IC50, (bladder) = 3.8 muM, IC50, portal vein = 75 muM) showed enhanced activity at the bladder, while maintaining unprecedented bladder selectivity in vitro. The N-benzenesulfonyl analogue (-)-22, a bioisoster of (-)-11, showed similar activity at the bladder with enhanced selectivity (IC50, bladder = 116 muM, IC50, portal vein = 120 muM) (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0968-0896(00)00260-1
• 作为产物：
  描述：

  2-乙酰基-4-氰基苯酚 在 四氢吡咯 、 sodium hypochlorite 、 sodium tetrahydroborate 、 disodium hydrogenphosphate 、 Jacobsen's catalyst 、 对甲苯磺酸 作用下， 以 甲醇 、 二氯甲烷 、 甲苯 为溶剂， 反应 4.0h， 生成 6-cyano-2,2-dimethylchromene-3,4-epoxide
  参考文献：
  名称：

  Identification of 3-hydroxy-4[3,4-dihydro-3-oxo-2H-1,4-benzoxazin-4-yl]-2,2-dimethyldihydro-2H-benzopyran derivatives as potassium channel activators and anti-inflammatory agents

  摘要：

  The present study described the design, synthesis and identification of 3-hydroxy-4[3,4-dihydro-3-oxo-2H-1,4-benzoxazin-4-yl]-2,2-dimethyldihydro-2H-benzopyran derivatives. Their biological activity was tested for K-ATP channel opener as antihypertensives, COX-1 and COX-2 activity. The results were compared with the activity of cromakalim, ibuprofen and celecoxib. The study aimed at exploring the influence of introduction of a benzoxazine substituent at position 6 of various derivatives of benzopyrans in order to improve biological activity. Several compounds were found to be equipotent or even more potent than cromakalim. Out of these nitro-substituted benzopyrans, nitro substitution at benzoxazino group possessed potent antihypertensive activity in the R/S isomers. With amino derivatives, activity remains constant when compared with standard cromakalim. Similarly, compounds 17b, 17c, 17e and 17h have exhibited around 40 % inhibition of COX-1 as compared to the inhibition of COX-2. Only two compounds 17g and 17i exhibited effective inhibition more than 50 % of COX-2 compared with the inhibition of COX-1 at a concentration of 0.3 mg/ml.

  DOI：

  10.1007/s00044-015-1344-6

文献信息

• Stereoselective Epoxidation of Alkenes with Hydrogen Peroxide using a Bipyrrolidine‐Based Family of Manganese Complexes
  作者：Isaac Garcia‐Bosch、Laura Gómez、Alfonso Polo、Xavi Ribas、Miquel Costas

  DOI：10.1002/adsc.201100409

  日期：2012.1

  Novel manganese complexes containing N4‐tetradentate ligands derived from chiral bipyrrolidinediamines catalyze the stereoselective epoxidation of a wide array of alkenes using low catalyst loadings (0.1 mol%) and hydrogen peroxide (1.2 equiv.) as terminal oxidant. This family of catalysts affords good to excellent yields (80–100%) and moderate to good ees (40–73%) in short reaction times (30 min)

  含有衍生自手性联吡咯烷二胺的N 4-四齿配体的新型锰配合物，使用低催化剂负载量（0.1 mol％）和过氧化氢（1.2当量）作为末端氧化剂，催化多种烯烃的立体选择性环氧化。该系列催化剂可有效利用过氧化氢，在较短的反应时间（30分钟）内提供良好至极佳的收率（80–100％）和中等至良好的ee s（40–73％）。
• Unusual solvent-effect in stereochemistry of asymmetric epoxidation using a (salen)chromium(III) complex as a catalyst
  作者：Hirotoshi Imanishi、Tsutomu Katsuki

  DOI：10.1016/s0040-4039(96)02274-5

  日期：1997.1

  Epoxidation of conjugated olefins has been examined with (salen)chromium(III) complexes as catalysts. Although (salen)chromium(III) complexes were catalytically less active than the corresponding (salen)manganese(III) complexes, the reactions with the chromium complexes were found to exhibit interesting solvent-dependent stereochemistry.

  已经用（salen）铬（III）配合物作为催化剂检查了共轭烯烃的环氧化。尽管（salen）铬（III）配合物的催化活性低于相应的（salen）锰（III）配合物，但发现与铬配合物的反应表现出有趣的溶剂依赖性立体化学。
• Proton-Promoted and Anion-Enhanced Epoxidation of Olefins by Hydrogen Peroxide in the Presence of Nonheme Manganese Catalysts
  作者：Chengxia Miao、Bin Wang、Yong Wang、Chungu Xia、Yong-Min Lee、Wonwoo Nam、Wei Sun

  DOI：10.1021/jacs.5b11579

  日期：2016.1.27

  in the epoxidation of olefins by nonheme manganese catalysts and aqueous hydrogen peroxide. More specifically, a mononuclear nonheme manganese complex bearing a tetradentate N4 ligand, Mn(II)(Dbp-MCP)(OTf)2 (Dbp-MCP = (1R,2R)-N,N'-dimethyl-N,N'-bis((R)-(3,5-di-tert-butyl-phenyl)-2-pyridinylmethyl)cyclohexane-1,2-diamine; OTf(-) = CF3SO3(-)), is a highly efficient catalyst in the epoxidation of olefins

  我们报告了非血红素锰催化剂和过氧化氢水溶液在烯烃环氧化中的显着布朗斯台德酸效应。更具体地说，带有四齿 N4 配体 Mn(II)(Dbp-MCP)(OTf)2 (Dbp-MCP = (1R,2R)-N,N'-二甲基-N,N'-的单核非血红素锰复合物双((R)-(3,5-二叔丁基-苯基)-2-吡啶基甲基)环己烷-1,2-二胺；OTf(-) = CF3SO3(-))，是一种高效的催化剂在 H2SO4 (1-3 mol %) 存在下，通过 H2O2 水溶液对烯烃进行环氧化。在 H2SO4 存在下，环氧化物产物的产率以及化学和对映选择性显着增加；在不存在 H2SO4 的情况下没有观察到环氧化物的形成。此外，产物产率和对映选择性在很大程度上取决于锰催化剂和布朗斯台德酸。其他氧化剂（如过酸、烷基氢过氧化物和碘代苯）对烯烃的催化环氧化也受 H2SO4 存在的影响；在 H2SO4 存在下，无论氧化剂如何，产
• A Diacetate Ketone-Catalyzed Asymmetric Epoxidation of Olefins
  作者：Bin Wang、Xin-Yan Wu、O. Andrea Wong、Brian Nettles、Mei-Xin Zhao、Dajun Chen、Yian Shi

  DOI：10.1021/jo900330n

  日期：2009.5.15

  A fructose-derived diacetate ketone has been shown to be an effective catalyst for asymmetric epoxidation. High ee values have been obtained for a variety of trans and trisubstituted olefins including electron-deficient α,β-unsaturated esters as well as certain cis olefins.

  果糖衍生的二乙酸酮已被证明是不对称环氧化的有效催化剂。各种反式和三取代烯烃（包括缺电子 α,β-不饱和酯以及某些顺式烯烃）都获得了高 ee 值。
• Nonheme Manganese-Catalyzed Asymmetric Oxidation. A Lewis Acid Activation versus Oxygen Rebound Mechanism: Evidence for the “Third Oxidant”
  作者：Roman V. Ottenbacher、Konstantin P. Bryliakov、Evgenii P. Talsi

  DOI：10.1021/ic101297x

  日期：2010.9.20

  oxidation sideways. However, the oxomanganese(IV) species were found to perform the Lewis acid activation of the acyl and alkyl hydroperoxides or iodosylarenes to form the new type of oxidant [oxomanganese(IV) complex with a terminal oxidant], with the latter accounting for the predominant enantioselective epoxidation pathway in the nonheme manganese-catalyzed olefin epoxidations.

  研究了一系列手性非血红素氨基吡啶基锰（II）配合物[LMn II（OTf）2 ]的催化性能。发现上述络合物可以用不同的氧化剂（过氧羧酸，氢过氧化物烷基，碘代芳烃等）以高转化率和选择性（高达100％）和对映体过量（高达79％）有效地催化对映选择性烯烃氧化为相应的环氧化物。 。探讨了配体结构对催化性能的影响。环氧化的对映选择性被认为是强烈地依赖于氧化剂（performic，过，以及结构中号氯过酸;叔-丁基和枯基氢过氧化物；因此，有证据表明末端氧化剂分子被掺入了氧转移中间体的结构中。高价电子顺磁共振活性锰配合物[LMN IV = O] 2+和[LMN IV（μ-O）2的Mn III L] 3+在起始催化剂与氧化剂相互作用时检测到H 2 O 3。高价络合物不会环氧化苯乙烯，它们本身只能导致较小的烯烃侧向氧化。然而，发现氧锰（IV）物种对酰基和氢过氧化物或碘代芳烃进行路易斯酸活化，形成新型氧化剂[具