7,9,9-trimethylspiro[4.5]dec-7-ene-1,4-dione | 151700-28-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 7,9,9-trimethylspiro[4.5]dec-7-ene-1,4-dione
• CAS: 151700-28-6
• 化学式: C₁₃H₁₈O₂
• 分子量: 206.285
• InChiKey: PFGVHOHTCVIBSO-UHFFFAOYSA-N

物化性质

• 沸点：
  331.0±42.0 °C(Predicted)
• 密度：
  1.06±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  15
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.69
• 拓扑面积：
  34.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  7,9,9-trimethylspiro[4.5]dec-7-ene-1,4-dione 在 palladium on activated charcoal 二甲基硫 、 potassium tert-butylate 、 氨 、 氢气 、 lithium 、 对甲苯磺酸 、 臭氧 、 pyridinium chlorochromate 作用下， 以 甲醇 、 乙醚 、 苯 为溶剂， -78.0~25.0 ℃ 、303.98 kPa 条件下， 反应 21.33h， 生成 rel-(4R,8R,9R)-6,6,9-Trimethyltricyclo<6.3.0.0^4,8>undec-1-en-3-one
  参考文献：
  名称：

  Spiroannulation approach to pentalenene, an angular triquinane sesquiterpene

  摘要：

  The route to the angular triquinane (+/-)-pentalenene (la) followed from an efficient geminal acylation of the acetal of isophorone or its homolog 6b by 1,2-bis((trimethylsilyl) oxy) cyclobutene (3) in the presence of boron trifluoride etherate. Ring cleavage and reclosure (9 --> 11) secured the required spiro[4.4]nonane system with a pendant ketone function in place for the closure of the final, central : I ring. The relative stereochemistry at C-9 was established during hydrogenation over palladium of the C-3 double bond of 11, but the facial selectivity was determined by the mode of reduction of the conjugated, orthogonal double bond at C-6 of 11. After cyclization to the enone 17b, the synthesis was completed by reductions of both the double bond and the ketone and simple dehydration. The 9-epi isomer (26) of (+/-)-pentalenene was synthesized also.

  DOI：

  10.1021/jo00080a018
• 作为产物：
  描述：

  异佛尔酮 、 alkaline earth salt of/the/ methylsulfuric acid 在 三氟化硼乙醚 、 对甲苯磺酸 作用下， 以 二氯甲烷 、 苯 为溶剂， 生成 7,9,9-trimethylspiro[4.5]dec-7-ene-1,4-dione
  参考文献：
  名称：

  Spiroannulation approach to pentalenene, an angular triquinane sesquiterpene

  摘要：

  The route to the angular triquinane (+/-)-pentalenene (la) followed from an efficient geminal acylation of the acetal of isophorone or its homolog 6b by 1,2-bis((trimethylsilyl) oxy) cyclobutene (3) in the presence of boron trifluoride etherate. Ring cleavage and reclosure (9 --> 11) secured the required spiro[4.4]nonane system with a pendant ketone function in place for the closure of the final, central : I ring. The relative stereochemistry at C-9 was established during hydrogenation over palladium of the C-3 double bond of 11, but the facial selectivity was determined by the mode of reduction of the conjugated, orthogonal double bond at C-6 of 11. After cyclization to the enone 17b, the synthesis was completed by reductions of both the double bond and the ketone and simple dehydration. The 9-epi isomer (26) of (+/-)-pentalenene was synthesized also.

  DOI：

  10.1021/jo00080a018

文献信息

• Formation of 2,2-disubstituted 1,3-cyclopentanediones from ketals with 1,2-bis(trimethylsilyloxy)cyclobutene
  作者：Yong-Jin Wu、Dean W. Strickland、Tracy J. Jenkins、Pei-Ying Liu、D. Jean Burnell

  DOI：10.1139/v93-169

  日期：1993.9.1

  The direct formation of 2,2-disubstituted 1,3-cyclopentanedione compounds by a Lewis acid catalysed reaction with 1,2-bis(trimethylsilyloxy)cyclobutene proceeds in good to excellent yields with unhindered ketals, but steric hindrance reduces the yields considerably. A carbonyl group α or β to the ketal, or a carbon–carbon double bond α to the ketal, stops the reaction completely. Orthoesters do not give geminally acylated products in synthetically useful yields.

  通过路易斯酸催化的反应，使用1,2-双(三甲基硅氧基)环丁烯与没有受阻碍的缩酮，直接形成2,2-二取代的1,3-环戊二酮化合物，产率良好至优秀，但立体位阻显著降低了产率。位于缩酮α或β位置的羰基，或者与缩酮α位置相邻的碳-碳双键会完全停止反应。正酯不会以合成有用的产率产生双酰化产物。
• Assembly of tricyclic compounds that include the spiro[4.4]nonane subunit
  作者：Pei-Ying Liu、Yong-Jin Wu、D. Jean Burnell

  DOI：10.1139/v97-080

  日期：1997.6.1

  Spiroannulation of ketals derived from unsaturated cyclohexenone derivatives by the Lewis acid-catalyzed reaction of 1,2-bis((trimethylsilyl)oxy)cyclobutene 5 led to spiro[4.5]decene-diones 9 and 30. These were transformed into spiro[4.4]nonene derivatives 25 and 35/36 via similar sequences involving ozonolysis and aldol ring reclosure. Reduction of an annular double bond allowed facile closure of a third ring

  通过路易斯酸催化的 1,2-双（（三甲基甲硅烷基）氧基）环丁烯 5 的反应，衍生自不饱和环己烯酮衍生物的缩酮的螺环化导致螺 [4.5] 癸烯二酮 9 和 30。这些转化为螺 [4.4]壬烯衍生物 25 和 35/36 通过类似的序列包括臭氧分解和羟醛环重闭合。环状双键的还原使得第三个环也可以通过羟醛反应轻松闭合。这项工作导致了来自 9 的单一氧化角三喹烷 28，以及来自 30 的三环 [6.2.1.01,5] 十一烷衍生物 41。还从 9 中获得了氧杂三环 [5.3.1.01,5] 十一烷衍生物 19。 关键词：螺环化、成对酰化、倍半萜烯合成。
• Facial selectivity in nucleophilic reactions of spirocyclic ketones can be controlled by a distant, orthogonal double bond
  作者：Pei-Ying Liu、D. Jean Burnell

  DOI：10.1039/c39940001183

  日期：——

  Spiro[4.5]dec-7-ene-1,4-dione and derivatives substituted at C-7, C-8, and/or C-9 gave products of reaction with methyllithium and with sodium borohydride that in every instance favoured nucleophilic carbonyl attack on the face syn to the double bond; the results are consistent with stereoelectronic control, and the selectivity correlates with a difference in the abilities of the orthogonal C–C bond to donate electron density.

  在C-7、C-8和/或C-9上被取代的螺[4.5]癸-7-烯-1,4-二酮及其衍生物与甲基锂和硼氢化钠反应，在每种情况下都倾向于对双键的同侧进行亲核羰基攻击；结果与立体电子控制一致，选择性与正交C-C键的供电子密度能力差异相关。
• Enantio- and diastereoselectivity in the reduction of spiro[4.5]decane-1,4-dione derivatives with baker's yeast
  作者：Yan-Yi Zhu、D. Jean Burnell

  DOI：10.1016/0957-4166(96)00430-2

  日期：1996.11

  Reductions mediated by baker's yeast were carried out on five spiro[4.5]decane-1,4-dione derivatives 4, 9, 12, 15, and 18. Enantioselectivity was always very high, but this did not correlate with the facial diastereoselectivity, which ranged from very high to zero. In some instances, the facial selectivity of the yeast-mediated reduction was lower than that of NaBH4. The reduction product of 4 was

  通过面包酵母介导的减少是在五个螺[4.5]癸烷-1,4-二酮衍生物进行4，9，12，15，和18。对映选择性一直很高，但这与面部非对映选择性无关，其范围从非常高到零。在某些情况下，酵母介导的还原反应的面部选择性低于NaBH 4。4的还原产物在几个步骤中转化为对映体富集的双环中间体5形式，用于合成角三喹烷戊烯1。酵母介导的螺酮21还原 证明了赤道羰基的还原是非常优选的反应方式。
• Spiroannulation approach to pentalenene, an angular triquinane sesquiterpene
  作者：Y.-J. Wu、Y.-Y. Zhu、D. Jean Burnell

  DOI：10.1021/jo00080a018

  日期：1994.1

  The route to the angular triquinane (+/-)-pentalenene (la) followed from an efficient geminal acylation of the acetal of isophorone or its homolog 6b by 1,2-bis((trimethylsilyl) oxy) cyclobutene (3) in the presence of boron trifluoride etherate. Ring cleavage and reclosure (9 --> 11) secured the required spiro[4.4]nonane system with a pendant ketone function in place for the closure of the final, central : I ring. The relative stereochemistry at C-9 was established during hydrogenation over palladium of the C-3 double bond of 11, but the facial selectivity was determined by the mode of reduction of the conjugated, orthogonal double bond at C-6 of 11. After cyclization to the enone 17b, the synthesis was completed by reductions of both the double bond and the ketone and simple dehydration. The 9-epi isomer (26) of (+/-)-pentalenene was synthesized also.