(1R,5S,7R,8R,10S,14R,15S,16S)-7,8-dimethoxy-7,8-dimethyl-2,13-dioxo-15,16-diphenyl-3,6,9,12-tetraoxatricyclo[12.2.0.0^5,10]hexadecane | 181586-77-6

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物 - 环丁烷木脂素
• 英文名称: (1R,5S,7R,8R,10S,14R,15S,16S)-7,8-dimethoxy-7,8-dimethyl-2,13-dioxo-15,16-diphenyl-3,6,9,12-tetraoxatricyclo[12.2.0.0^5,10]hexadecane
• 英文别名: (1S,5R,6S,7S,8R,12S,14R,15R)-14,15-dimethoxy-14,15-dimethyl-6,7-diphenyl-3,10,13,16-tetraoxatricyclo[10.4.0.05,8]hexadecane-4,9-dione
• CAS: 181586-77-6
• 化学式: C₂₈H₃₂O₈
• 分子量: 496.557
• InChiKey: KSOAHARYUABOMW-BGKRVMHFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  36
• 可旋转键数：
  4
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  89.5
• 氢给体数：
  0
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  (1R,5S,7R,8R,10S,14R,15S,16S)-7,8-dimethoxy-7,8-dimethyl-2,13-dioxo-15,16-diphenyl-3,6,9,12-tetraoxatricyclo[12.2.0.0^5,10]hexadecane 在 4-二甲氨基吡啶 、 lithium aluminium tetrahydride 、 N,N'-二环己基碳二亚胺 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 21.0h， 生成 (2S,3S,5R,6R)-2,3-bis([(indene-2-carbonyl)oxy]methyl)-5,6-dimethoxy-5,6-dimethyl[1,4]dioxane
  参考文献：
  名称：

  Investigations of the Asymmetric Intramolecular [2 + 2] Photocycloaddition and Its Application as a Simple Access to Novel C₂-Symmetric Chelating Bisphosphanes Bearing a Cyclobutane Backbone

  摘要：

  The asymmetric intramolecular [2 + 2] photocycloaddition of alpha,beta-enoates was evaluated as a simple access to the novel Ct-symmetric bisphosphanes 22 and 27 possessing a cyclobutane backbone. A source of different chiral auxiliaries for investigations of the photochemical key step was provided by the transacetalization of dialkyl tartrates 3 with the corresponding 3,3-dialkoxybutan-2-ones 4. An insight into the selection mechanism was gained by temperature dependent measurements on the irradiation of the dicinnamates 10a-d, since the corresponding Eyring diagram discloses strictly linear functions as well as an isoselective relationship. Diol 8a turned out to be a structurally optimized auxiliary in terms of chiral induction and product crystallization and was also successfully applied in the first asymmetric photodimerization of 2-indenecarboxylic acid esters. Indeed, in this case excellent diastereoselectivities were achieved, too, but head-to-tail dimers 16a and 16b were formed predominantly. Diesters 11a and 16a were converted by standard procedures into the desired enantiopure 1,4-diphosphane 22 and 1,5-diphosphane 27. Furthermore, the hitherto unknown absolute configuration of delta-truxinic acid was elucidated from a single crystal X-ray structure analysis of 11a.

  DOI：

  10.1021/jo960556y
• 作为产物：
  描述：

  3,3-二甲氧基-2-丁酮 在 4-二甲氨基吡啶 、 lithium aluminium tetrahydride 、 对甲苯磺酸 作用下， 以 四氢呋喃 、 吡啶 、 二氯甲烷 、 甲苯 为溶剂， -28.0~70.0 ℃ 、9.33 kPa 条件下， 反应 87.0h， 生成 (1R,5S,7R,8R,10S,14R,15S,16S)-7,8-dimethoxy-7,8-dimethyl-2,13-dioxo-15,16-diphenyl-3,6,9,12-tetraoxatricyclo[12.2.0.0^5,10]hexadecane
  参考文献：
  名称：

  Investigations of the Asymmetric Intramolecular [2 + 2] Photocycloaddition and Its Application as a Simple Access to Novel C₂-Symmetric Chelating Bisphosphanes Bearing a Cyclobutane Backbone

  摘要：

  The asymmetric intramolecular [2 + 2] photocycloaddition of alpha,beta-enoates was evaluated as a simple access to the novel Ct-symmetric bisphosphanes 22 and 27 possessing a cyclobutane backbone. A source of different chiral auxiliaries for investigations of the photochemical key step was provided by the transacetalization of dialkyl tartrates 3 with the corresponding 3,3-dialkoxybutan-2-ones 4. An insight into the selection mechanism was gained by temperature dependent measurements on the irradiation of the dicinnamates 10a-d, since the corresponding Eyring diagram discloses strictly linear functions as well as an isoselective relationship. Diol 8a turned out to be a structurally optimized auxiliary in terms of chiral induction and product crystallization and was also successfully applied in the first asymmetric photodimerization of 2-indenecarboxylic acid esters. Indeed, in this case excellent diastereoselectivities were achieved, too, but head-to-tail dimers 16a and 16b were formed predominantly. Diesters 11a and 16a were converted by standard procedures into the desired enantiopure 1,4-diphosphane 22 and 1,5-diphosphane 27. Furthermore, the hitherto unknown absolute configuration of delta-truxinic acid was elucidated from a single crystal X-ray structure analysis of 11a.

  DOI：

  10.1021/jo960556y