3-ethyl-4-methyl-2-(p-toluenesulfonyl)-1H-pyrrole | 152796-95-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 3-ethyl-4-methyl-2-(p-toluenesulfonyl)-1H-pyrrole
• 英文别名: 2-tosyl-3-ethyl-4-methylpyrrole；2-p-Toluenesulfonyl-3-ethyl-4-methyl-pyrrole；3-ethyl-4-methyl-2-(4-methylphenyl)sulfonyl-1H-pyrrole
• CAS: 152796-95-7
• 化学式: C₁₄H₁₇NO₂S
• 分子量: 263.36
• InChiKey: CVHPVIMHCLPJTJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  18
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  58.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-ethyl-4-methyl-2-(p-toluenesulfonyl)-1H-pyrrole 在 sodium tetrahydroborate 、 双氧水 作用下， 以 乙醇 、 溶剂黄146 为溶剂， 反应 19.0h， 生成 4-乙基-3-甲基-3-吡咯啉-2-酮
  参考文献：
  名称：

  Barton-zard吡咯合成的改进偶联程序

  摘要：

  Barton-Zard吡咯合成中改进的最终步骤在vic-硝基乙酸酯与异氰酸酯的偶联环化反应中使用廉价的碳酸钾作为碱。在该修饰中，合成上有用的2-羰基烷氧基吡咯（1a，b和3）和2-（对甲苯磺酰基）吡咯（2a，b）的分离产率始终提高到78-89％的范围。通过与30％的过氧化氢在乙酸中反应，可方便而直接地将2a转化为5-（对甲苯磺酰基）-2-吡咯烷酮4，从而避免了涉及溴化然后溶剂分解的两步程序。

  DOI：

  10.1002/jhet.5570380239
• 作为产物：
  描述：

  2-硝基戊烷-3-醇 在 4-二甲氨基吡啶 、 四甲基胍 作用下， 以 四氢呋喃 、 二氯甲烷 、 异丙醇 为溶剂， 反应 70.0h， 生成 3-ethyl-4-methyl-2-(p-toluenesulfonyl)-1H-pyrrole
  参考文献：
  名称：

  Synthesis of a 10-Oxo-Bilirubin:  Effects of the Oxo Group on Conformation, Transhepatic Transport, and Glucuronidation

  摘要：

  Bilirubin, the yellow pigment of jaundice, is a linear tetrapyrrole with a methylene group at its center, C(10), a position of crucial importance to its conformation and metabolism. The presence of the central methylene group allows the bilirubin to fold into an intramolecularly hydrogen-bonded conformation. This paper describes the first synthesis of a bilirubin analogue with an oxo group at C(10). The change from CH2 to C=O, from sp(3) to sp(2), is designed to stress the molecule at its hinge and relax its conformation. Such compounds have been suggested as potential oxidative metabolites of bilirubin in vivo. 10-Oxo-mesobilirubin-XIII alpha (1) is a red crystalline solid, unlike its parent, mesobilirubin-XIII alpha, which is a bright yellow solid. It is surprisingly polar, relative to the parent, yet it does not exhibit a significantly larger bicarbonate/chloroform partition coefficient. Like the parent, 1 appears to adopt an intramolecularly hydrogen-bonded ridge-tile-like conformation. In normal rats, 1 is metabolized to acylglucuronides, which are secreted into bile, but a portion of the administered dose is secreted into bile intact. In mutant rats (Gunn rats) lacking bilirubin glucuronyl transferase, 1 was excreted efficiently in bile in unchanged form, unlike the parent with a methylene group at C(10). Thus, introduction of the oxygen function at C(10) has little effect on hepatic uptake but a dramatic effect on canalicular secretion into bile.

  DOI：

  10.1021/ja991814m

文献信息

• Regioselective Oxidation of Pyrrole Derivatives with DDQ and Its Synthetic Application
  作者：Ryoji Iwamoto、Yutaka Ukaji、Katsuhiko Inomata

  DOI：10.1246/cl.2010.176

  日期：2010.3.5

  t-Butyl 4-alkyl-1H-pyrrole-2-carboxylates were oxidized with DDQ in the presence of MeOH at the α-position of the alkyl substituent at the C-4 position regioselectively to afford 4-acylpyrrole derivatives. On the other hand, treatment of the pyrroles with DDQ in the presence of AcOH furnished the corresponding 4-(1-acetoxyalkyl)pyrroles. The resulting 4-(acetoxymethyl)pyrrole reacted with various nucleophiles to afford the functionalized pyrrole derivatives in good yields.

  t-丁基4-烷基-1H-吡咯-2-羧酸酯在甲醇存在下与DDQ氧化，选择性地在C-4位的烷基取代基的α位生成4-酰基吡咯衍生物。另一方面，将吡咯与DDQ和醋酸一起处理，得到相应的4-(1-乙酰氧基烷基)吡咯。所得的4-(乙酰氧基甲基)吡咯与各种亲核试剂反应，产生功能化的吡咯衍生物，产率良好。
• Convenient and Regioselective Syntheses of 3,4-Disubstituted Δ³-Pyrrolin-2-one Derivatives Starting from 2-Tosyl-3,4-Disubstituted Pyrroles
  作者：Hideki Kinoshita、Yoshio Hayashi、Yasue Murata、Katsuhiko Inomata

  DOI：10.1246/cl.1993.1437

  日期：1993.8

  3,4-Disubstituted Δ3-pyrrolin-2-ones were prepared in high yields via 5-tosyl-Δ3-pyrrolin-2-ones (4) starting from 2-tosylpyrroles regioselectively. The compounds 4 were found to be useful intermediates for the preparation of a variety of Δ3-pyrrolin-2-one derivatives. The reactions of 4 with various nucleophiles and active methylene compounds bearing an appropriate leaving group are described.

  通过 5-tosyl-Δ3-pyrrolin-2-ones (4) 从 2-tosylpyrroles 开始区域选择性地制备 3,4-二取代的 Δ3-pyrrolin-2-ones。发现化合物4是用于制备多种Δ3-吡咯啉-2-酮衍生物的有用中间体。描述了 4 与各种亲核试剂和带有适当离去基团的活性亚甲基化合物的反应。
• Rearrangement of Tosyl Group of 3,4-Disubstituted 2-Tosylpyrroles under Mild Acidic Conditions
  作者：Kazuhiro Kohori、Hideki Kinoshita、Katsuhiko Inomata

  DOI：10.1246/cl.1995.799

  日期：1995.9

  Tosyl group of 3,4-disubstituted 2-tosylpyrroles easily rearranged from 2- to 5-position by treatment with TFA. The ratio of the regioisomers at equilibrium was definitely influenced by the bulkiness of the substituent at 3-position of the starting 2-tosylpyrroles.

  通过用 TFA 处理，3,4-二取代的 2-tosylpyrroles 的 Tosyl 基团很容易从 2-位重排到 5-位。平衡时区域异构体的比例肯定受起始 2-甲苯磺酰基吡咯的 3-位取代基的体积影响。
• An improved coupling procedure for the barton-zard pyrrole synthesis
  作者：Pavel Bobál、David A. Lightner

  DOI：10.1002/jhet.5570380239

  日期：2001.3

  final step in the Barton-Zard pyrrole synthesis uses inexpensive potassium carbonate as base in the coupling-cyclization reaction of vic-nitro-acetates with isocyanides. In this modification the isolated yields of synthetically useful 2-carboalkoxypyrroles (1a,b and 3) and 2-(p-toluenesulfonyl)pyrroles (2a,b) consistently rise to the 78-89% range. Conversion of 2a to 5-(p-toluenesulfonyl)-2-pyrrolinone

  Barton-Zard吡咯合成中改进的最终步骤在vic-硝基乙酸酯与异氰酸酯的偶联环化反应中使用廉价的碳酸钾作为碱。在该修饰中，合成上有用的2-羰基烷氧基吡咯（1a，b和3）和2-（对甲苯磺酰基）吡咯（2a，b）的分离产率始终提高到78-89％的范围。通过与30％的过氧化氢在乙酸中反应，可方便而直接地将2a转化为5-（对甲苯磺酰基）-2-吡咯烷酮4，从而避免了涉及溴化然后溶剂分解的两步程序。
• Synthesis of a 10-Oxo-Bilirubin:  Effects of the Oxo Group on Conformation, Transhepatic Transport, and Glucuronidation
  作者：Qingqi Chen、Michael T. Huggins、David A. Lightner、Wilma Norona、Antony F. McDonagh

  DOI：10.1021/ja991814m

  日期：1999.10.1

  Bilirubin, the yellow pigment of jaundice, is a linear tetrapyrrole with a methylene group at its center, C(10), a position of crucial importance to its conformation and metabolism. The presence of the central methylene group allows the bilirubin to fold into an intramolecularly hydrogen-bonded conformation. This paper describes the first synthesis of a bilirubin analogue with an oxo group at C(10). The change from CH2 to C=O, from sp(3) to sp(2), is designed to stress the molecule at its hinge and relax its conformation. Such compounds have been suggested as potential oxidative metabolites of bilirubin in vivo. 10-Oxo-mesobilirubin-XIII alpha (1) is a red crystalline solid, unlike its parent, mesobilirubin-XIII alpha, which is a bright yellow solid. It is surprisingly polar, relative to the parent, yet it does not exhibit a significantly larger bicarbonate/chloroform partition coefficient. Like the parent, 1 appears to adopt an intramolecularly hydrogen-bonded ridge-tile-like conformation. In normal rats, 1 is metabolized to acylglucuronides, which are secreted into bile, but a portion of the administered dose is secreted into bile intact. In mutant rats (Gunn rats) lacking bilirubin glucuronyl transferase, 1 was excreted efficiently in bile in unchanged form, unlike the parent with a methylene group at C(10). Thus, introduction of the oxygen function at C(10) has little effect on hepatic uptake but a dramatic effect on canalicular secretion into bile.