methyl (2S,4S)-4-hydroxy-1-(9-phenyl-9H-fluoren-9-yl)pyrrolidine-2-carboxylate | 1236783-98-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 芴
• 英文名称: methyl (2S,4S)-4-hydroxy-1-(9-phenyl-9H-fluoren-9-yl)pyrrolidine-2-carboxylate
• 英文别名: methyl (2S,4S)-4-hydroxy-1-(9-phenylfluoren-9-yl)pyrrolidine-2-carboxylate
• CAS: 1236783-98-4
• 化学式: C₂₅H₂₃NO₃
• 分子量: 385.463
• InChiKey: MJIVTEQYUJILHQ-MBSDFSHPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.57
• 重原子数：
  29.0
• 可旋转键数：
  3.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.24
• 拓扑面积：
  49.77
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  methyl (2S,4S)-4-hydroxy-1-(9-phenyl-9H-fluoren-9-yl)pyrrolidine-2-carboxylate 、 叔丁基二甲硅基三氟甲磺酸酯 在 2,6-二甲基吡啶 作用下， 以 二氯甲烷 为溶剂， 反应 0.25h， 以96%的产率得到(2S,4S)-methyl-4-(tert-butyldimethylsilyloxy)-1-(9-phenyl-9H-fluoren-9-yl)pyrrolidine-2-carboxylate
  参考文献：
  名称：

  Total Synthesis of Depsilairdin

  摘要：

  The total synthesis of depsilairdin, a host-selective phytotoxin isolated from Leptosphaeria maculans (the causal agent of blackleg disease of oilseed Brassicas), has been achieved by N-terminal extension of a suitably protected derivative of the hitherto unknown amino acid (2S,3S,4R)-3,4-dihydroxy-3-methyl-proline (Dhmp) followed by esterification with lairdinol A. The latter esterification, complicated by the sterically hindered nature of the carboxyl group, was accomplished by a novel method involving reaction of the 1-hydroxybenzotriazole (HOBt) derived active ester with the bromomagnesium alkoxide of lairdinol A. Three depsilairdin analogues were also prepared by replacing the Dhmp residue with L-proline and cis- and trans-4-hydroxy-L-proline. Phytotoxicity assays showed that the analogues were nontoxic to both blackleg-susceptible (brown mustard) and -resistant (canola) plants, suggesting that the presence of the Dhmp residue in depsilairdin is important for its host-selective toxicity toward brown mustard.

  DOI：

  10.1021/jo1009239
• 作为产物：
  描述：

  (2S)-4-氧代-1-(9-苯基芴基)-脯氨酸甲酯 在 sodium tetrahydroborate 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 16.0h， 以68%的产率得到methyl (2S,4S)-4-hydroxy-1-(9-phenyl-9H-fluoren-9-yl)pyrrolidine-2-carboxylate
  参考文献：
  名称：

  Total Synthesis of Depsilairdin

  摘要：

  The total synthesis of depsilairdin, a host-selective phytotoxin isolated from Leptosphaeria maculans (the causal agent of blackleg disease of oilseed Brassicas), has been achieved by N-terminal extension of a suitably protected derivative of the hitherto unknown amino acid (2S,3S,4R)-3,4-dihydroxy-3-methyl-proline (Dhmp) followed by esterification with lairdinol A. The latter esterification, complicated by the sterically hindered nature of the carboxyl group, was accomplished by a novel method involving reaction of the 1-hydroxybenzotriazole (HOBt) derived active ester with the bromomagnesium alkoxide of lairdinol A. Three depsilairdin analogues were also prepared by replacing the Dhmp residue with L-proline and cis- and trans-4-hydroxy-L-proline. Phytotoxicity assays showed that the analogues were nontoxic to both blackleg-susceptible (brown mustard) and -resistant (canola) plants, suggesting that the presence of the Dhmp residue in depsilairdin is important for its host-selective toxicity toward brown mustard.

  DOI：

  10.1021/jo1009239

文献信息

• Total Synthesis of Depsilairdin
  作者：Dale E. Ward、Sandip G. Pardeshi

  DOI：10.1021/jo1009239

  日期：2010.8.6

  The total synthesis of depsilairdin, a host-selective phytotoxin isolated from Leptosphaeria maculans (the causal agent of blackleg disease of oilseed Brassicas), has been achieved by N-terminal extension of a suitably protected derivative of the hitherto unknown amino acid (2S,3S,4R)-3,4-dihydroxy-3-methyl-proline (Dhmp) followed by esterification with lairdinol A. The latter esterification, complicated by the sterically hindered nature of the carboxyl group, was accomplished by a novel method involving reaction of the 1-hydroxybenzotriazole (HOBt) derived active ester with the bromomagnesium alkoxide of lairdinol A. Three depsilairdin analogues were also prepared by replacing the Dhmp residue with L-proline and cis- and trans-4-hydroxy-L-proline. Phytotoxicity assays showed that the analogues were nontoxic to both blackleg-susceptible (brown mustard) and -resistant (canola) plants, suggesting that the presence of the Dhmp residue in depsilairdin is important for its host-selective toxicity toward brown mustard.