(RS)-6-chloro-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-ol | 70505-61-2

• 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: (RS)-6-chloro-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-ol
• 英文别名: 6-chloro-2,2-dimethylchroman-4-ol；6-Chloro-2,2-dimethyl-3,4-dihydrochromen-4-ol
• CAS: 70505-61-2
• 化学式: C₁₁H₁₃ClO₂
• 分子量: 212.676
• InChiKey: HRPHXGDUDVWPNU-UHFFFAOYSA-N

物化性质

• 熔点：
  98-101 °C
• 沸点：
  300.9±42.0 °C(Predicted)
• 密度：
  1.217±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  14
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (RS)-6-chloro-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-ol 在 对甲苯磺酸 作用下， 以 甲苯 为溶剂， 生成 6-chloro-2,2-dimethyl-2H-chromene
  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
• 作为产物：
  描述：

  乙酸-4-氯苯酯 在 四氢吡咯 、 sodium tetrahydroborate 、 三氯化铝 作用下， 以 甲醇 为溶剂， 反应 3.0h， 生成 (RS)-6-chloro-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-ol
  参考文献：
  名称：

  4,6-Disubstituted 2,2-Dimethylchromans Structurally Related to the K_ATP Channel Opener Cromakalim: Design, Synthesis, and Effect on Insulin Release and Vascular Tone

  摘要：

  Five series (ureas, thioureas, carbamates, sulfonylureas, and amides) of 4,6-disubstituted-2,2dimethylchromans structurally related to cromakalim were prepared and evaluated, as putative ATP-sensitive potassium channel activators, on rat pancreatic islets and rat aorta rings. The biological data indicate that most compounds were, like the reference molecule cromakalim, more active on the vascular smooth muscle tissue (myorelaxant effect on 30 mM KCl induced contractions of rat aorta rings) than on the pancreatic tissue (inhibition of 16.7 mM glucose induced insulin release from rat pancreatic islets). However, some drugs (8h, 8i, 9f, 9g, 9h, and 9i) markedly inhibited insulin release and exhibited an activity equivalent or greater than that of diazoxide. Compounds 9h and 9i were also found to be more active on pancreatic beta-cells than on vascular smooth muscle cells. Last, the amide 6b was selected in order to examine its mechanism of action on vascular smooth muscle cells. Pharmacological results suggest that the compound acted as a K-ATP channel opener. In conclusion, the present data indicate that appropriate structural modifications can generate dimethylchromans with pharmacological profiles different from that of cromakalim.

  DOI：

  10.1021/jm040789e

文献信息

• Synthesis and reactions of some chloro-2,2-dimethylchromens
  作者：John D. Hepworth、Terry K. Jones、Robert Livingstone

  DOI：10.1016/s0040-4020(01)98965-3

  日期：1981.1

  5-, 6-, 7-, and 8-Chloro-2,2-dimethylchromins have been prepared from the corresponding chloro-coumarin and their conversion into the 3,4-dihalogenochroman derivatives is described. The 4-halogen atom is shown to be the more susceptible to hydrolysis by conversion of the resulting halohydrins into chromanones and epoxides. The formation of bis-chromens during the dehalogenation of 3-halogenochromanones

  已经从相应的氯香豆素制备了5-，6-，7-和8-氯-2,2-二甲基苯并二恶英，并描述了它们向3,4-二卤代苯并二氢吡喃衍生物的转化。通过将产生的卤代醇转化成苯并二氢吡喃酮和环氧化物，显示4-卤素原子更易于水解。据报道在3-卤代铬烷酮的脱卤过程中双铬的形成。
• Synthesis and Activity of Novel and Selective I_Ks-Channel Blockers
  作者：Uwe Gerlach、Joachim Brendel、Hans-Jochen Lang、Erich F. Paulus、Klaus Weidmann、Andrea Brüggemann、Andreas E. Busch、Hartmut Suessbrich、Markus Bleich、Rainer Greger

  DOI：10.1021/jm0109255

  日期：2001.11.1

  Since the discovery of the I-Ks-potassium channel as the slowly activating component of the delayed rectifier current (I-k) in cardiac tissue, the search for blockers of this current has been intense. During the screening of K-ATP-channel openers of the chromanol type we found that chromanol 293B was able to block I-Ks. Chromanol 293B is a sulfonamide analogue of the K-ATP-channel openers but had no activity on this target. Experiments were initiated to improve the activity and properties based on this lead compound. As a screening model we used Xenopus oocytes injected with human minK (KCNE1). Variations of the aromatic substituent and the sulfonamide group were prepared, and their activity was evaluated. We found that the greatest influence on activity was found in the aromatic substituents. The most active compounds were alkoxy substituted. We chose HMR1556 ((3R, 4S)-(+)-N-[-3-hydroxy-2,2-dimethyl-6-(4,4,4-trifluorobutoxy)chroman-4-yl]-N-methyl-ethanesulfonamide) 10a for development as an antiarrhythmic drug. The absolute configuration, resulting from an X-ray single-crystal structure analysis, was determined.
• HEPWORTH, J. D.;JONES, T. K.;LIVINGSTONE, R., TETRAHEDRON, 1981, 37, N 15, 2613-2616
  作者：HEPWORTH, J. D.、JONES, T. K.、LIVINGSTONE, R.

  DOI：——

  日期：——
• 4,6-Disubstituted 2,2-Dimethylchromans Structurally Related to the K_ATP Channel Opener Cromakalim: Design, Synthesis, and Effect on Insulin Release and Vascular Tone
  作者：Sophie Sebille、Pascal de Tullio、Bénédicte Becker、Marie-Hélène Antoine、Stéphane Boverie、Bernard Pirotte、Philippe Lebrun

  DOI：10.1021/jm040789e

  日期：2005.1.1

  Five series (ureas, thioureas, carbamates, sulfonylureas, and amides) of 4,6-disubstituted-2,2dimethylchromans structurally related to cromakalim were prepared and evaluated, as putative ATP-sensitive potassium channel activators, on rat pancreatic islets and rat aorta rings. The biological data indicate that most compounds were, like the reference molecule cromakalim, more active on the vascular smooth muscle tissue (myorelaxant effect on 30 mM KCl induced contractions of rat aorta rings) than on the pancreatic tissue (inhibition of 16.7 mM glucose induced insulin release from rat pancreatic islets). However, some drugs (8h, 8i, 9f, 9g, 9h, and 9i) markedly inhibited insulin release and exhibited an activity equivalent or greater than that of diazoxide. Compounds 9h and 9i were also found to be more active on pancreatic beta-cells than on vascular smooth muscle cells. Last, the amide 6b was selected in order to examine its mechanism of action on vascular smooth muscle cells. Pharmacological results suggest that the compound acted as a K-ATP channel opener. In conclusion, the present data indicate that appropriate structural modifications can generate dimethylchromans with pharmacological profiles different from that of cromakalim.
• 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
  作者：Mohsina Bano、Kuldipsinh P. Barot、Shailesh V. Jain、Manjunath D. Ghate

  DOI：10.1007/s00044-015-1344-6

  日期：2015.7

  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.