(9S,12S)-12-[((S)-2-tert-Butoxycarbonylamino-propionyl)-methyl-amino]-4-methoxy-10-methyl-11-oxo-2-oxa-10-aza-tricyclo[12.2.2.1^3,7]nonadeca-1(17),3,5,7(19),14(18),15-hexaene-9-carboxylic acid methyl ester | 244769-42-4

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物
• 英文名称: (9S,12S)-12-[((S)-2-tert-Butoxycarbonylamino-propionyl)-methyl-amino]-4-methoxy-10-methyl-11-oxo-2-oxa-10-aza-tricyclo[12.2.2.1^3,7]nonadeca-1(17),3,5,7(19),14(18),15-hexaene-9-carboxylic acid methyl ester
• 英文别名: methyl (9S,12S)-4-methoxy-10-methyl-12-[methyl-[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]-11-oxo-2-oxa-10-azatricyclo[12.2.2.13,7]nonadeca-1(16),3,5,7(19),14,17-hexaene-9-carboxylate
• CAS: 244769-42-4
• 化学式: C₃₀H₃₉N₃O₈
• 分子量: 569.655
• InChiKey: OUFOMEALOGCTPS-TZYHBYERSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  41
• 可旋转键数：
  8
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  124
• 氢给体数：
  1
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  (9S,12S)-12-[((S)-2-tert-Butoxycarbonylamino-propionyl)-methyl-amino]-4-methoxy-10-methyl-11-oxo-2-oxa-10-aza-tricyclo[12.2.2.1^3,7]nonadeca-1(17),3,5,7(19),14(18),15-hexaene-9-carboxylic acid methyl ester 在 盐酸 、 lithium hydroxide 、 二苯基膦叠氮化物 、 碳酸氢钠 、 三氟乙酸 作用下， 以 四氢呋喃 、 甲醇 、 水 、 乙酸乙酯 、 N,N-二甲基甲酰胺 为溶剂， 反应 98.33h， 生成 (1S,4R,7S,10S,13S,16S)-24-甲氧基-10-(4-甲氧基苄基)-4,7,9,13,15,29-六甲基-22-氧杂-3,6,9,12,15,29-六氮杂四环[14.12.2.218,21.123,27]三十三-18,20,23(31),24,26,32-己烯-2,5,8,11,14,30-六酮
  参考文献：
  名称：

  Total Synthesis of an Antitumor Agent RA-VII via an Efficient Preparation of Cycloisodityrosine

  摘要：

  Details of efficient syntheses of (9S, 12S)-cycloisodityrosine (6) and a concise total synthesis of RA-VII(1) were described. An intramolecular SNAr-based cycloetherification reaction was employed as the key ring-closure step for construction of the illusive 14-membered m,p-cyclophane. Treatment of methyl N-[N-(tert-butyloxycarbonyl)-L(3-hydroxy-4-methoxyphenylalanyl)]-L-4-fluoro-3-nitrophenylalaninate ((9S,12S)-10) with potassium carbonate in DMSO at room temperature provided a mixture of two atropdiastereomers 20a and 20b in 75% yield that were transformed into cycloisodityrosine 6 in good overall yield. Furthermore, a size-selective ring-forming process was established for methyl N-[N-(tert-butyloxycarbonyl)-L-(3,4-dihydroxyphenlalanyl)]-L-4-fluoro-3- nitrophenylalaninate ((9S,12S)-11). Thus, cyclization of 11 (K2CO3, DMSO, rt), followed by in situ methylation, gave exclusively the 14-membered m,p-cyclphane 20a and 20b without competitive formation of the alternative 15-membered p,p-cyclophane. The selective ring-forming process allowed us to develop one of the shortest and the most efficient synthesis of cycloisodityrosine to date. Computational studies have shown that it was the elimination, but not the addition, step that determined the ring-size selectivity observed in the cyclization of substrate 11. Coupling of 6 with L-N-Boc-Ala (51) proceeded efficiently to provide the corresponding tripeptide 52 that, after removal of the N-Boc function, was allowed to react with another tripeptide 53 to afford the hexapeptide 50 in good overall yield. Saponification followed by liberation of amino function from 50 gave the seco-acid, whose cyclization (DPPA, DMF, NaHCO3) afforded the natural product RA-VII (1).

  DOI：

  10.1021/jo990432w
• 作为产物：
  描述：

  (9S,12S)-12-[N-(tert-butyloxycarbonyl)-N-methylamino]-2,11-dioxo-4-methoxy-9-methoxycarbonyl-10-methyl-10-azatricyclo[12.2.2.1^3,7]nonadeca-3,5,7(19),14,16,17-hexaene 在 N,N-二异丙基乙胺 、 bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate 、 三氟乙酸 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 1.0h， 生成 (9S,12S)-12-[((S)-2-tert-Butoxycarbonylamino-propionyl)-methyl-amino]-4-methoxy-10-methyl-11-oxo-2-oxa-10-aza-tricyclo[12.2.2.1^3,7]nonadeca-1(17),3,5,7(19),14(18),15-hexaene-9-carboxylic acid methyl ester
  参考文献：
  名称：

  Total Synthesis of an Antitumor Agent RA-VII via an Efficient Preparation of Cycloisodityrosine

  摘要：

  Details of efficient syntheses of (9S, 12S)-cycloisodityrosine (6) and a concise total synthesis of RA-VII(1) were described. An intramolecular SNAr-based cycloetherification reaction was employed as the key ring-closure step for construction of the illusive 14-membered m,p-cyclophane. Treatment of methyl N-[N-(tert-butyloxycarbonyl)-L(3-hydroxy-4-methoxyphenylalanyl)]-L-4-fluoro-3-nitrophenylalaninate ((9S,12S)-10) with potassium carbonate in DMSO at room temperature provided a mixture of two atropdiastereomers 20a and 20b in 75% yield that were transformed into cycloisodityrosine 6 in good overall yield. Furthermore, a size-selective ring-forming process was established for methyl N-[N-(tert-butyloxycarbonyl)-L-(3,4-dihydroxyphenlalanyl)]-L-4-fluoro-3- nitrophenylalaninate ((9S,12S)-11). Thus, cyclization of 11 (K2CO3, DMSO, rt), followed by in situ methylation, gave exclusively the 14-membered m,p-cyclphane 20a and 20b without competitive formation of the alternative 15-membered p,p-cyclophane. The selective ring-forming process allowed us to develop one of the shortest and the most efficient synthesis of cycloisodityrosine to date. Computational studies have shown that it was the elimination, but not the addition, step that determined the ring-size selectivity observed in the cyclization of substrate 11. Coupling of 6 with L-N-Boc-Ala (51) proceeded efficiently to provide the corresponding tripeptide 52 that, after removal of the N-Boc function, was allowed to react with another tripeptide 53 to afford the hexapeptide 50 in good overall yield. Saponification followed by liberation of amino function from 50 gave the seco-acid, whose cyclization (DPPA, DMF, NaHCO3) afforded the natural product RA-VII (1).

  DOI：

  10.1021/jo990432w