6-Bromo-3,4-dihydro-2,2-dimethyl-3,4-epoxy-2H-1-benzopyran | 122262-14-0

• 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-Bromo-3,4-dihydro-2,2-dimethyl-3,4-epoxy-2H-1-benzopyran
• 英文别名: 6-Bromo-2,2-dimethyl-1a,7b-dihydro-2h-oxireno[c]chromene；6-bromo-2,2-dimethyl-1a,7b-dihydrooxireno[2,3-c]chromene
• CAS: 122262-14-0
• 化学式: C₁₁H₁₁BrO₂
• 分子量: 255.111
• InChiKey: DJVXKNDAODGMIU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  14
• 可旋转键数：
  0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  21.8
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  6-Bromo-3,4-dihydro-2,2-dimethyl-3,4-epoxy-2H-1-benzopyran 在 polymer-bound 4-(N-benzyl-N-methylamino)pyridine 作用下， 以 二氯甲烷 为溶剂， 反应 60.0h， 生成 [(3S,4R)-6-bromo-2,2-dimethyl-4-pyrrolidin-1-yl-3,4-dihydrochromen-3-yl] acetate
  参考文献：
  名称：

  Natural Product-like Combinatorial Libraries Based on Privileged Structures. 3. The “Libraries from Libraries” Principle for Diversity Enhancement of Benzopyran Libraries

  摘要：

  As described in the preceding two papers, our interest in the construction of natural and natural product-like libraries for chemical biology studies led to the development of a new solid-phase cycloloading strategy for the construction of substituted benzopyrans. Herein, we report a parallel solution-phase method that facilitates the enhancement of both the size and diversity of these non-oligomeric benzopyran libraries using the "libraries from libraries" principle. We examine the rationale behind the use of this tandem strategy to construct discrete small molecule libraries, and describe the development of a polymer-assisted solution-phase (PASP) methodology necessary to effect the required transformations. Once developed, this chemistry is applied to two demonstration libraries.

  DOI：

  10.1021/ja0020355
• 作为产物：
  描述：

  6-溴-2,2-二甲基-2H-苯并吡喃 在 二甲基二环氧乙烷 作用下， 以 丙酮 、 乙腈 为溶剂， 反应 1.0h， 以100%的产率得到6-Bromo-3,4-dihydro-2,2-dimethyl-3,4-epoxy-2H-1-benzopyran
  参考文献：
  名称：

  Natural Product-like Combinatorial Libraries Based on Privileged Structures. 3. The “Libraries from Libraries” Principle for Diversity Enhancement of Benzopyran Libraries

  摘要：

  As described in the preceding two papers, our interest in the construction of natural and natural product-like libraries for chemical biology studies led to the development of a new solid-phase cycloloading strategy for the construction of substituted benzopyrans. Herein, we report a parallel solution-phase method that facilitates the enhancement of both the size and diversity of these non-oligomeric benzopyran libraries using the "libraries from libraries" principle. We examine the rationale behind the use of this tandem strategy to construct discrete small molecule libraries, and describe the development of a polymer-assisted solution-phase (PASP) methodology necessary to effect the required transformations. Once developed, this chemistry is applied to two demonstration libraries.

  DOI：

  10.1021/ja0020355

文献信息

• Multivariate Metal–Organic Frameworks as Multifunctional Heterogeneous Asymmetric Catalysts for Sequential Reactions
  作者：Qingchun Xia、Zijian Li、Chunxia Tan、Yan Liu、Wei Gong、Yong Cui

  DOI：10.1021/jacs.7b03113

  日期：2017.6.21

  The search for versatile heterogeneous catalysts with multiple active sites for broad asymmetric transformations has long been of great interest, but it remains a formidable synthetic challenge. Here we demonstrate that multivariate metal-organic frameworks (MTV-MOFs) can be used as an excellent platform to engineer heterogeneous catalysts featuring multiple and cooperative active sites. An isostructural

  长期以来，人们对寻找具有多个活性位点的多功能多相催化剂进行广泛的不对称转化一直很感兴趣，但它仍然是一个艰巨的合成挑战。在这里，我们证明了多元金属有机框架 (MTV-MOF) 可用作设计具有多个协同活性位点的多相催化剂的绝佳平台。构建了包含多达三种不同手性金属盐催化剂的 2 倍互穿 MTV-MOF 的同构系列，并将其用作各种不对称顺序烯烃环氧化/环氧化物开环反应的高效且可回收的多相催化剂。框架的相互渗透使金属盐单元彼此相邻，允许协同激活，这导致在单个部分的总和上提高效率和对映选择性。在 MTV-MOF 中操纵分子催化剂可以控制活性和选择性的事实将有助于设计用于对映选择性过程的新型多功能材料。
• Synthesis and antihypertensive activity of 4-(1,2-dihydro-2-oxo-1-pyridyl)-2H-1-benzopyrans and related compounds, new potassium channel activators
  作者：Rolf Bergmann、Rolf Gericke

  DOI：10.1021/jm00164a005

  日期：1990.2

  other heterocycles such as 4-pyridone, pyrimidone, pyridazinone, pyrazinone, and 1,4-butanesultam, the activity is maintained. The removal of the 3-hydroxy function (----17a) does not significantly reduce the activity. The elimination of water from the chromanols leads to the formation of the chromenes, which are among the most potent antihypertensives known. The influence of diverse substituents, in

  描述了4-（1,2-二氢-2-氧代-1-吡啶基）-2H-1-苯并吡喃-3-醇的合成和降压活性。未取代的吡啶酮加合物铅化合物7e具有高活性，吡啶酮环上的取代基导致活性降低。为了获得最佳活性，必须在C-6位上强烈吸电子的取代基。当2-吡啶酮环被其他杂环如4-吡啶酮，嘧啶酮，哒嗪酮，吡嗪酮和1,4-丁烷磺胺取代时，活性得以维持。3-羟基官能团（---- 17a）的去除不会显着降低活性。从苯并二氢吡喃醇中除去水会导致苯并二氢吡喃酮的形成，这是已知最有效的降压药之一。各种取代基，尤其是杂环C-6取代基的影响，以4-（2-氧代-1-吡咯烷基）色满-3-醇系列进行了研究。铬醇在3-羟基处被短链酸酯化，保持其活性。色烯双键的环氧化也产生活性化合物。环氧化物22的重排产生3-酮化合物23和烯醇衍生物25。酮23a的还原产生顺式-苯并二氢吡喃醇7ab及其反式异构体7e。在自发性高血压大鼠中以1 mg / kg
• 4-Heterocyclyloxy-2H-1-benzopyran potassium channel activators
  作者：Rolf Bergmann、Volker Eiermann、Rolf Gericke

  DOI：10.1021/jm00172a013

  日期：1990.10

  The reaction of 2,4-dihydroxypyridine (2) with 3,4-epoxy-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-6-carbonitrile (1) yielded the 4-[(1,2-dihydro-2-oxo-4-pyridyl)oxy] compound 3a, accompanied by small amounts of the isomeric 4-(1,2-dihydro-4-hydroxy-2-oxo-1-pyridyl) compound 4. This could also be prepared by hydrogenation of the benzyloxy derivative 5. Reaction of 3,6-pyridazinediol (10) with 1 (R = CN) gave the 4-[(1,6-dihydro-6-oxo-3-pyridazinyl)oxy] compound 11a, which in turn rearranged on heating with NaH in DMSO into the 4-(1,6-dihydro-3-hydroxy-6-oxo-1-pyridazinyl) compound 12. A series of 6-substituted analogues (R = CO2Me, CSNH2, NO2, Br) of 3a and 11a were synthesized. N-Alkylation led to compounds 14a-c (R = Me, Et, CHMe2). The 4-heterocyclyloxychromenes 9 and 16a were obtained by alkaline hydrolysis of their 3-camphorsulfonates. The racemic pyridazinyloxy compounds 11a and 14a could be resolved via their diastereomeric camphorsulfonates or camphanates. The differences between the 4-heterocyclyloxychromanols and the isomeric N-substituted compounds 4 and 12 were elucidated in the course of extensive NMR investigations. While in DMSO the former appeared to be conformationally flexible molecules the latter were rigid. All compounds were tested for oral antihypertensive activity in spontaneously hypertensive rats, using doses of 1 mg/kg. High and long lasting activities were found for the pyridyloxy compounds 3a and 3d, the pyridazinyloxy compound 11a, and its N-alkylation products, as well as for the 3S,4R-enantiomers 20a and 22a. (-)-(3S,4R)-3,4-Dihydro-4-[(1,6-dihydro-1-methyl-6-oxo-3- pyridazinyl)oxy]-3-hydroxy-2,2-dimethyl-2H-1-benzopyran-6-carbonitrile (22a) was selected for further development.
• BERGMANN, ROLF;GERICKE, ROLF, J. MED. CHEM., 33,(1990) N, C. 492-504
  作者：BERGMANN, ROLF、GERICKE, ROLF

  DOI：——

  日期：——
• GERICKE, ROLF;BAUMGARTH, MANFRED;LUES, INGEBORG;BERGMANN, ROLF;PEYER, JAC+
  作者：GERICKE, ROLF、BAUMGARTH, MANFRED、LUES, INGEBORG、BERGMANN, ROLF、PEYER, JAC+

  DOI：——

  日期：——