(S)-2''',2'''-Dimethyl-4''',5'''-dihydro-[2,4';2',4'';2'',4''']quateroxazole-4,3'''-dicarboxylic acid 4-benzyl ester 3'''-tert-butyl ester | 912656-51-0

• 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: (S)-2''',2'''-Dimethyl-4''',5'''-dihydro-[2,4';2',4'';2'',4''']quateroxazole-4,3'''-dicarboxylic acid 4-benzyl ester 3'''-tert-butyl ester
• CAS: 912656-51-0
• 化学式: C₂₇H₂₈N₄O₈
• 分子量: 536.541
• InChiKey: CGKHLRICZXJLEI-FQEVSTJZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.39
• 重原子数：
  39.0
• 可旋转键数：
  6.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.37
• 拓扑面积：
  143.16
• 氢给体数：
  0.0
• 氢受体数：
  11.0

反应信息

• 作为反应物：
  描述：

  (S)-2''',2'''-Dimethyl-4''',5'''-dihydro-[2,4';2',4'';2'',4''']quateroxazole-4,3'''-dicarboxylic acid 4-benzyl ester 3'''-tert-butyl ester 在 palladium on activated charcoal 盐酸 、 氢气 作用下， 以 1,4-二氧六环 、 甲醇 、 乙酸乙酯 为溶剂， 反应 4.5h， 生成 2-[2-[2-[(1R)-1-[[2-[2-[2-[(1S)-1-amino-2-hydroxyethyl]-1,3-oxazol-4-yl]-1,3-oxazol-4-yl]-1,3-oxazole-4-carbonyl]amino]-2-tert-butylsulfanylethyl]-5-methyl-1,3-oxazol-4-yl]-5-methyl-1,3-oxazol-4-yl]-1,3-oxazole-4-carboxylic acid
  参考文献：
  名称：

  Total Synthesis of (R)-Telomestatin

  摘要：

  We have achieved a total synthesis of telomestatin, and its absolute configuration was determined to be (R). Coupling of cysteine-containing trisoxazole amine and serine-containing trisoxazole carboxylic acid, followed by macrocyclization, provided a 24-membered diamide. The seventh oxazole ring was formed by a Shin's procedure via dehydroamide. Cyclodehydration of a modified (R)-cysteine-(S-Bu-t) moiety using Kelly's method (PPh3(O)-Tf2O) with anisole furnished (R)-telomestatin, whose CD spectrum was in good agreement with that of the natural product.

  DOI：

  10.1021/ol061793i
• 作为产物：
  描述：

  (S)-methyl 2-[3-(tert-butoxycarbonyl)-2,2-dimethyloxazolidin-4-yl]oxazole-4-carboxylate 在 盐酸 、 lithium hydroxide 、 二乙胺基三氟化硫 、 potassium carbonate 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 二氯甲烷 、 水 、 乙酸乙酯 、 N,N-二甲基甲酰胺 为溶剂， 反应 25.5h， 生成 (S)-2''',2'''-Dimethyl-4''',5'''-dihydro-[2,4';2',4'';2'',4''']quateroxazole-4,3'''-dicarboxylic acid 4-benzyl ester 3'''-tert-butyl ester
  参考文献：
  名称：

  Total Synthesis of (R)-Telomestatin

  摘要：

  We have achieved a total synthesis of telomestatin, and its absolute configuration was determined to be (R). Coupling of cysteine-containing trisoxazole amine and serine-containing trisoxazole carboxylic acid, followed by macrocyclization, provided a 24-membered diamide. The seventh oxazole ring was formed by a Shin's procedure via dehydroamide. Cyclodehydration of a modified (R)-cysteine-(S-Bu-t) moiety using Kelly's method (PPh3(O)-Tf2O) with anisole furnished (R)-telomestatin, whose CD spectrum was in good agreement with that of the natural product.

  DOI：

  10.1021/ol061793i

文献信息

• Synthesis of Heptaoxazole Macrocyclic Analogues of Telomestatin and Evaluation of Their Telomerase Inhibitory Activities
  作者：Kazuaki Shibata、Masahito Yoshida、Takashi Takahashi、Motoki Takagi、Kazuo Shin-ya、Takayuki Doi

  DOI：10.1246/bcsj.20130198

  日期：2013.12.15

  We have demonstrated various synthetic routes to heptaoxazole macrocyclic analogues of telomestatin and evaluated their inhibitory activities against telomerase. We synthesized three heptaoxazole macrocycles consisting of different numbers of methyloxazole moieties and another heptaoxazole analogue with a bromooxazole moiety instead of one of the two methyloxazole moieties found in the structure of telomestatin. The bromooxazole analogue underwent Suzuki–Miyaura coupling leading to six analogues having aromatic substituents on the oxazole moiety. The substituents on the oxazole moiety in the heptaoxazole macrocycles, which include a methyl group, a bromine atom, and aromatic substituents, did not affect the inhibitory activity of the overall molecule. In addition, three amine-linked analogues were synthesized by modification of the S-tert-butyl group in the bromooxazole analogue with amine-linked α-bromoacetamides. Notably, one of the amine-linked heptaoxazole analogues exhibited almost the same inhibitory activity as telomestatin.

  我们展示了端粒酶七恶唑大环类似物的各种合成路线，并评估了它们对端粒酶的抑制活性。我们合成了三种由不同数量的甲基恶唑分子组成的庚恶唑大环，以及另一种庚恶唑类似物，其中溴恶唑分子取代了端粒丝肽结构中的两个甲基恶唑分子之一。溴恶唑类似物经过铃木-宫拉偶联反应，产生了六种在恶唑分子上具有芳香取代基的类似物。七恶唑大环中恶唑分子上的取代基（包括一个甲基、一个溴原子和芳香取代基）并不影响整个分子的抑制活性。此外，通过用胺连α-溴乙酰胺修饰溴恶唑类似物中的 S-叔丁基，合成了三种胺连类似物。值得注意的是，其中一种胺联七恶唑类似物的抑制活性几乎与端马司他丁相同。