tert-butyl 2-isothiocyanato-4,5,6,7-tetrahydrobenzo[b]-thiophene-3-carboxylate | 207743-78-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 噻吩类
• 英文名称: tert-butyl 2-isothiocyanato-4,5,6,7-tetrahydrobenzo[b]-thiophene-3-carboxylate
• 英文别名: Tert-butyl 2-isothiocyanato-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate
• CAS: 207743-78-0
• 化学式: C₁₄H₁₇NO₂S₂
• 分子量: 295.426
• InChiKey: VQYFBAAUBBICCY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.4
• 重原子数：
  19
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  99
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  tert-butyl 2-isothiocyanato-4,5,6,7-tetrahydrobenzo[b]-thiophene-3-carboxylate 在 sodium carbonate 、 三氟乙酸 作用下， 以 二氯甲烷 、 丙酮 为溶剂， 反应 6.03h， 生成 2-Ethylsulfanyl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d][1,3]oxazin-4-one
  参考文献：
  名称：

  Novel Thieno[2,3-d][1,3]oxazin-4-ones as Inhibitors of Human Leukocyte Elastase

  摘要：

  A series of thieno[2,3-d][1,3]oxazin-4-ones was synthesized and evaluated in vitro for inhibitory activity toward human leukocyte elastase. New synthetic routes to 2-alkoxy-, 2-alkylthio-, and 2-sec-amino-substituted derivatives are reported. This study demonstrates the versatility of 2-aminothiophenes prepared by Gewald reaction as a synthetic entry to serine protease-inhibiting, fused 1,3-oxazin-4-ones. Introduction of ethoxy, n-propoxy, and ethylthio groups at C-2 delivered the most potent inhibitors of this series with K-i values lower than 11 nM. Kinetic studies and product analyses revealed the formation of acyl-enzymes as a result of the attack of the active site serine at the carbon C-4 and subsequent deacylation. This mode of action is similar to the inhibition of serine proteases by 4H-3,1-benzoxazin-4-ones. Replacement of the benzene ring in benzoxazinones by a (substituted) thiophene led to improved hydrolytic stability and retained inhibitory potency.

  DOI：

  10.1021/jm9708341
• 作为产物：
  描述：

  氰乙酸叔丁酯 在 吗啉 、 sulfur 、 calcium carbonate 作用下， 以 乙醇 、 二氯甲烷 、 水 为溶剂， 反应 8.0h， 生成 tert-butyl 2-isothiocyanato-4,5,6,7-tetrahydrobenzo[b]-thiophene-3-carboxylate
  参考文献：
  名称：

  Novel Thieno[2,3-d][1,3]oxazin-4-ones as Inhibitors of Human Leukocyte Elastase

  摘要：

  A series of thieno[2,3-d][1,3]oxazin-4-ones was synthesized and evaluated in vitro for inhibitory activity toward human leukocyte elastase. New synthetic routes to 2-alkoxy-, 2-alkylthio-, and 2-sec-amino-substituted derivatives are reported. This study demonstrates the versatility of 2-aminothiophenes prepared by Gewald reaction as a synthetic entry to serine protease-inhibiting, fused 1,3-oxazin-4-ones. Introduction of ethoxy, n-propoxy, and ethylthio groups at C-2 delivered the most potent inhibitors of this series with K-i values lower than 11 nM. Kinetic studies and product analyses revealed the formation of acyl-enzymes as a result of the attack of the active site serine at the carbon C-4 and subsequent deacylation. This mode of action is similar to the inhibition of serine proteases by 4H-3,1-benzoxazin-4-ones. Replacement of the benzene ring in benzoxazinones by a (substituted) thiophene led to improved hydrolytic stability and retained inhibitory potency.

  DOI：

  10.1021/jm9708341

文献信息

• Regioselective Sulfonylation and <i>N</i>- to <i>O</i>-Sulfonyl Migration of Quinazolin-4(3<i>H</i>)-ones and Analogous Thienopyrimidin-4(3<i>H</i>)-ones
  作者：Matthias D. Mertens、Markus Pietsch、Gregor Schnakenburg、Michael Gütschow

  DOI：10.1021/jo4010876

  日期：2013.9.20

  The sulfonylation of quinazolin-4(3H)-ones and related tetrahydrobenzothieno[2,3-d]pyrimidin-4(3H)-ones with mesyl, tosyl, and p-cyanobenzenesulfonyl chloride was studied. A hydrogen substituent at 2-position directed the sulfonyl group to the N-3 position, while alkylsulfanyl or amino substituents led to sulfonylation of the carbonyl oxygen. The latter effect was attributed to steric influence and

  研究了喹唑啉-4（3 H）-酮和相关的四氢苯并噻吩并[2,3 - d ]嘧啶-4（3 H）-与磺酰基，甲苯磺酰基和对氰基苯磺酰氯的磺酰化反应。在2-位的氢取代基将磺酰基引导至N-3位，而烷基硫烷基或氨基取代基导致羰基氧的磺酰化。后者的作用归因于空间影响和2-取代基的正消旋作用。建立了N-磺酰化的2-取代的区域异构体的途径。观察到意外的1，3-磺酰基迁移并进一步分析。此过程发生在分子内N-到O如动力学和交叉实验所证实的-移位。