5-(((tert-butyldimethylsilyl)oxy)methyl)-3-ethylthiophene-2-carbaldehyde oxime | 1028947-14-9

• 分子结构分类: 有机化合物 - 有机杂环化合物
• 英文名称: 5-(((tert-butyldimethylsilyl)oxy)methyl)-3-ethylthiophene-2-carbaldehyde oxime
• CAS: 1028947-14-9
• 化学式: C₁₄H₂₅NO₂SSi
• 分子量: 299.51
• InChiKey: BHUJBZWVXNBTRW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.64
• 重原子数：
  19.0
• 可旋转键数：
  5.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.64
• 拓扑面积：
  41.82
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  5-(((tert-butyldimethylsilyl)oxy)methyl)-3-ethylthiophene-2-carbaldehyde oxime 在 N,N'-二环己基碳二亚胺 作用下， 以 甲苯 为溶剂， 生成 5-({[tert-butyl(dimethyl)silyl]oxy}methyl)-3-ethylthiophene-2-carbonitrile
  参考文献：
  名称：

  Discovery of CS-2100, a potent, orally active and S1P3-sparing S1P1 agonist

  摘要：

  S1P(3)-sparing S1P(1) agonists have attracted attention as a suppressant of autoimmunity with reduced side effects. Our synthetic efforts and extensive SAR studies led to the discovery of 10b named CS-2100 with the EC50 value of 4.0 nM for human S1P(1) and over 5000-fold selectivity against S1P(3). The in vivo immunosuppressive efficacy was evaluated in rats on host versus graft reaction and the ID50 value was determined at 0.407 mg/kg. The docking studies of CS-2100 with the homology model of S1P(1) and S1P(3) showed that the ethyl group on the thiophene ring of CS-2100 was sterically hindered by Phe263 in S1P(3), not in the case of Leu276 in S1P(1). This observation gives an explanation for the excellent S1P(3)-sparing characteristic of CS-2100. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2011.12.019
• 作为产物：
  描述：

  叔丁基[(4-乙基-2-噻吩基)甲氧基]二甲基硅烷 在 正丁基锂 、 盐酸羟胺 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 、 二氯甲烷 为溶剂， 反应 3.0h， 生成 5-(((tert-butyldimethylsilyl)oxy)methyl)-3-ethylthiophene-2-carbaldehyde oxime
  参考文献：
  名称：

  3-AZETIDINECARBOXYLIC ACID DERIVATIVES FOR USE AS IMMUNOSUPPRESSANTS

  摘要：

  公开号：

  EP1873153B1

文献信息

• Synthesis and SAR of 1,3-thiazolyl thiophene and pyridine derivatives as potent, orally active and S1P3-sparing S1P1 agonists
  作者：Masayoshi Asano、Tsuyoshi Nakamura、Yukiko Sekiguchi、Yumiko Mizuno、Takahiro Yamaguchi、Kazuhiko Tamaki、Takaichi Shimozato、Hiromi Doi-Komuro、Takashi Kagari、Wataru Tomisato、Ryotaku Inoue、Hiroshi Yuita、Keiko Oguchi-Oshima、Reina Kaneko、Futoshi Nara、Yumi Kawase、Noriko Masubuchi、Shintaro Nakayama、Tetsufumi Koga、Eiko Namba、Hatsumi Nasu、Takahide Nishi

  DOI：10.1016/j.bmcl.2012.03.067

  日期：2012.5

  We have previously disclosed 1,2,4-oxadiazole derivative 3 as a potent S1P(3)-sparing S1P(1) agonist. Although compound 3 exhibits potent and manageable immunosuppressive efficacy in various in vivo models, recent studies have revealed that its 1,2,4-oxadiazole ring is subjected to enterobacterial decomposition. As provisions for unpredictable issues, a series of alternative compounds were synthesized on the basis of compound 3. Extensive SAR studies led to the finding of 1,3-thiazole 24c with the EC50 value of 3.4 nM for human S1P(1), and over 5800-fold selectivity against S1P(3). In rat on host versus graft reaction (HvGR), the ID50 value of 24c was determined at 0.07 mg/kg. The pharmacokinetics in rat and monkey is also reported. Compared to compound 3, 24c showed excellent stability against enterobacteria. (C) 2012 Elsevier Ltd. All rights reserved.
• Synthesis and evaluation of CS-2100, a potent, orally active and S1P3- sparing S1P1 agonist
  作者：Tsuyoshi Nakamura、Masayoshi Asano、Yukiko Sekiguchi、Yumiko Mizuno、Kazuhiko Tamaki、Futoshi Nara、Yumi Kawase、Yoshiyuki Yabe、Daisuke Nakai、Emi Kamiyama、Yoko Urasaki-Kaneno、Takaichi Shimozato、Hiromi Doi-Komuro、Takashi Kagari、Wataru Tomisato、Ryotaku Inoue、Miyuki Nagasaki、Hiroshi Yuita、Keiko Oguchi-Oshima、Reina Kaneko、Takahide Nishi

  DOI：10.1016/j.ejmech.2012.02.022

  日期：2012.5

  Modulators of sphingosine phosphate receptor-1 (S1P(1)) have recently been focused as a suppressant of autoimmunity. We have discovered a 4-ethylthiophene-based S1P(1) agonist 1-(4-Ethyl-5-[5-(4-phenoxyphenyl)-1,2,4-oxadiazol-3-yl]-2-thienyl}methyl)azetidine-3-carboxylic acid (CS-2100, 8) showing potent S1P(1) agonist activity against S1P(3) and an excellent in vivo potency. We report herein the synthesis of CS-2100 (8) and pharmacological effects such as S1P(1) and S1P(3) agonist activity in vitro, peripheral blood lymphocyte lowering effects and the suppressive effects on adjuvant-induced arthritis and experimental autoimmune encephalomyelitis (EAE) in animal models. The pharmacokinetic data were also reported. CS-2100 (8) had >5000-fold greater agonist activity for human S1P(1) (EC50; 4.0 nM) relative to S1P(3) (EC50; >20000 nM). Following administration of single oral doses of 0.1 and 1 mg/kg of CS-2100 (8) in rats, lymphocyte counts decreased significantly, with a nadir at 8 and/or 72 h post-dose and recovery to vehicle control levels by 24-48 h post-dose. CS-2100 (8) is efficacious in the adjuvant-induced arthritis model in rats (ID50; 0.44 mg/kg). In the EAE model compared to the vehicle-treated group, significant decreases in the cumulative EAE scores were observed for 0.3 and 1 mg/kg CS-2100 (8) groups in mice. While CS-2100 (8) showed potent efficacy in various animal disease models, it was also revealed that the central 1,2,4-oxadiazole ring of CS-2100 (8) was decomposed by enterobacteria in intestine of rats and monkeys, implicating the latent concern about an external susceptibility in its metabolic process in the upcoming clinical studies. (C) 2012 Elsevier Masson SAS. All rights reserved.