(1SR,3SR,7RS)-3,6,6,9-tetramethylbicyclo[5.4.0]undec-8-en-2-one

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (1SR,3SR,7RS)-3,6,6,9-tetramethylbicyclo[5.4.0]undec-8-en-2-one
• 英文别名: (4aS,6S,9aR)-2,6,9,9-tetramethyl-4,4a,6,7,8,9a-hexahydro-3H-benzo[7]annulen-5-one
• 化学式: C₁₅H₂₄O
• 分子量: 220.355
• InChiKey: ZZXSOTFSRRQFBG-RWMBFGLXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  16
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  二氯甲烷 、 (1SR,3SR,7RS)-3,6,6,9-tetramethylbicyclo[5.4.0]undec-8-en-2-one 在 四氯化钛 、 magnesium 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 48.33h， 以51%的产率得到(1R*,3R*,7R*)-2-methylene-3,6,6,9-tetramethylbicyclo[5.4.0]undec-8-ene
  参考文献：
  名称：

  A diastereoselective synthesis of (1SR,3SR,7RS)-3-methyl-α-himachalene, the sex pheromone of the sandfly, Lutzomyia longipalpis (Diptera: Psychodidae)

  摘要：

  The sandfly, Lutzomyia longipalpis, vectors the causative agent of visceral leishmaniasis in the New World. The male-produced pheromone, (1S,3S,7R)-3-methyl-alpha-himachalene provides an opportunity for pest managing this pest problem by influencing the behaviour of the biting female. Previous syntheses of the pheromone have all focused on a late stage Diels-Alder cyclisation to generate the bicyclic cis-himachalene skeleton. By adopting a new retrosynthetic analysis that depends on an early stage Diels-Alder cyclisation, the number of steps has been reduced to ten, of which five are catalytic and so provides access to quantities suitable for field-scale experiments. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2012.04.037
• 作为产物：
  描述：

  methyl 6-tert-butyldimethylsilyloxy-2,5,5-trimethylhexanoate 在 lithium aluminium tetrahydride 、 草酰氯 、 氢氟酸 、 potassium tert-butylate 、 水 、 戴斯-马丁氧化剂 、 二甲基亚砜 、 三乙胺 、 pyridinium chlorochromate 作用下， 以 四氢呋喃 、 乙醚 、 二氯甲烷 、 乙腈 、 xylene 为溶剂， 反应 100.67h， 生成 (1SR,3SR,7RS)-3,6,6,9-tetramethylbicyclo[5.4.0]undec-8-en-2-one
  参考文献：
  名称：

  (1R*,3R*,7R*)-3-Methyl-α-himachalene 的合成，巴西 Jacobina 的 SandflyLutzomyia longipalpis 雄性产生的性信息素的外消旋体

  摘要：

  通过采用 (±)-14 至 (±)-18 的分子内 Diels-Alder 反应作为关键步骤，合成了 (±)-3-甲基-α-喜马查林的四种立体异构体 (1a-d)。白蛉Lutzomyia longipalpis 雄性产生的性信息素显示具有如图1c 所示的结构和相对构型。

  DOI：

  10.1002/(sici)1099-0690(199907)1999:7<1679::aid-ejoc1679>3.0.co;2-o

文献信息

• 3-Methyl-α-himachalene is confirmed, and the relative stereochemistry defined, by synthesis as the sex pheromone of the sandfly Lutzomyia longipalpis from Jacobina, Brazil
  作者：J. Gordon C. Hamilton、Antony M. Hooper、John A. Pickett、Kenji Mori、Satoshi Sano

  DOI：10.1039/a900242a

  日期：——

  The structure of the sex pheromone produced by the male sandfly Lutzomyia longipalpis, from the Jacobina region of Brazil, previously proposed tentatively as the novel homosesquiterpene 3-methyl-α-himachalene is confirmed by synthesis and biological activity; the relative stereochemistry is defined as 1RS,3RS,7RS by comparing the natural product with the four synthetic diastereoisomers.

  通过合成和生物活性证实了巴西雅各比纳地区雄性沙蝇 Lutzomyia longipalpis 产生的性信息素的结构，该信息素以前曾被初步认为是新型同源四萜 3-甲基δ-±-himachalene；通过比较天然产物和四种合成非对映异构体，确定了其相对立体化学结构为 1RS、3RS、7RS。
• Enantioselective synthesis of (1S,3S,7R)-3-methyl-α-himachalene, the sex pheromone of the sandfly Lutzomyia longipalpis from Jacobina, Brazil
  作者：Kenji Mori、Takuya Tashiro、Satoshi Sano

  DOI：10.1016/s0040-4039(00)00831-5

  日期：2000.7

  (1S,3S,7R)-3-Methyl-α-himachalene, the sex pheromone of the male sandfly (Lutzomyia longipalpis) from Jacobina, Brazil, was synthesized enantioselectively by employing Evans’ or Oppolzer’s asymmetric methylation as the key step. The absolute configuration at the ring junction of this pheromone is opposite to that of the known (1R,7R)-α-himachalene of plant origin.

  （1 S，3 S，7 R）-3-甲基-α-himachalene，来自巴西雅可比那的雄性fly（Lutzomyia longipalpis）的性信息素，是利用Evans或Oppolzer的不对称甲基化作为关键步骤选择性合成的。该信息素的环连接处的绝对构型与植物来源的已知（1 R，7 R）-α-喜马林烯的构型相反。
• Pheromone Synthesis, CCVIII: Synthesis of (1S,3S,7R)-3-Methyl-α-himachalene, the Sex Pheromone of the Sandfly Lutzomyia longipalpis from Jacobina, Brazil
  作者：Takuya Tashiro、Masahiko Bando、Kenji Mori

  DOI：10.1055/s-2000-8220

  日期：——

  (1S,3S,7R)-3-Methyl-α-himachalene, the sex pheromone of the male sandfly (Lutzomyia longipalpis) from Jacobina, Brazil, was synthesized enantioselectively by employing Evan's or Oppolzer's asymmetric methylation and intramolecular Diels-Alder reaction as the two key steps. The absolute configuration of the product was unambiguously established by X-ray analysis of a compound related to one of the synthetic intermediates. The ring junction of this sandfly pheromone possesses the absolute configuration opposite to that of the known (1R,7R)-α-himachalene of plant origin.

  (通过采用 Evan 或 Oppolzer 的不对称甲基化和分子内 Diels-Alder 反应这两个关键步骤，对映体选择性地合成了 (1S,3S,7R)-3-甲基-δ-himachalene，它是巴西雅各比纳雄性沙蝇（Lutzomyia longipalpis）的性信息素。通过对与合成中间体之一相关的化合物进行 X 射线分析，明确确定了产物的绝对构型。这种沙蝇信息素的环结具有与已知植物来源的(1R,7R)-δ-himachalene相反的绝对构型。