(E,4E)-4-cyclohex-2-en-1-ylidene-3-methylbut-2-enal | 180737-24-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (E,4E)-4-cyclohex-2-en-1-ylidene-3-methylbut-2-enal
• CAS: 180737-24-0
• 化学式: C₁₁H₁₄O
• 分子量: 162.232
• InChiKey: ZSYSVXOPFBXJNK-BDFJVSTISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 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：

  3-甲基-4-膦酰丁烯酸三乙酯 、 (E,4E)-4-cyclohex-2-en-1-ylidene-3-methylbut-2-enal 在 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 生成 ethyl (2E,4E,6E,8Z)-8-cyclohex-2-en-1-ylidene-3,7-dimethylocta-2,4,6-trienoate 、 ethyl (2Z,4E,6E,8E)-8-cyclohex-2-en-1-ylidene-3,7-dimethylocta-2,4,6-trienoate 、 ethyl (2E,4E,6E,8E)-8-cyclohex-2-en-1-ylidene-3,7-dimethylocta-2,4,6-trienoate
  参考文献：
  名称：

  Conformationally Defined 6-s-trans-Retinoic Acid Analogs. 3. Structure−Activity Relationships for Nuclear Receptor Binding, Transcriptional Activity, and Cancer Chemopreventive Activity

  摘要：

  We recently demonstrated that conformationally defined 6-s-trans-retinoic acid (RA) analogs were effective in the prevention of skin papillomas (Vaezi et al. J. Med. Chem. 1994, 37, 4499-4507) and selective agonists for nuclear receptor binding and activation (Alam et al. J. Med. Chem. 1995, 38, 2302-2310). In order to probe important structure-activity relationships, we evaluated a homologous series of four 6-s-trans-retinoids that are 8-(2'-cyclohexen-1'-ylidene)-3,7-dimethyl-2,4,6-octatrienoic acids with different substituents at 2' (R(2)) and 3' (R(1)) positions on the cyclohexene ring. UAB1 (R(1) = R(2) = H), UAB4 (R(1) = R(2) = Me), UAB7 (R(1) = Me, R(2) = iPr), and UAB8 (R(1) = Et, R(2) = iPr) contain alkyl R groups that mimic, to different extents, portions of the trimethylcyclohexenyl ring of RA. Both 9Z- and all-E-isomers of these retinoids were evaluated in binding assays for cellular retinoic acid-binding proteins (CRABP-I and CRABP-II), a nuclear retinoic acid receptor (RAR alpha), and a nuclear retinoid X receptor (RXR alpha). The all E-isomers of UAB retinoids bound tightly to CRABPs and RAR alpha, the binding affinity of the all-E-isomer increased systematically from UAB1 to UAB8, and binding for the latter was comparable to that of all-E-RA. In contrast to RA, the (9Z)-UAB retinoids were at least 200-fold less active than the all-E-isomers in binding to RAR alpha. The (9Z)-UAB isomers exhibited increasingly stronger binding to RXR alpha, and (9Z)-UAB8 was nearly as effective as (9Z)-RA in binding affinity. The retinoids were also evaluated in gene expression assays mediated by RAR alpha and RXR alpha homodimers or RAR alpha/RXR alpha heterodimers. Consistent with the binding affinities, the (all-E)-UAB retinoids activated gene transciption mediated by RAR alpha homodimers or RAR alpha/RXR alpha heterodimers, while the (9Z)-UAB isomers activated only the RXR alpha homodimer-mediated transcription. The all-E- and 9Z-isomers of the UAB retinoids were further evaluated for their capacity to prevent the induction of mouse skin papillomas. When compared to RA, only the (all-E)-UAB retinoids containing bulky R(1) and R(2) groups were effective in this chemoprevention assay. (9Z)-RA displayed equal capacity as RA to prevent papillomas, while the 9Z-isomers of the UAB retinoids were much less effective. Taken together, these studies demonstrate that the cyclohexenyl ring substituents of 6-s-trans-UAB retinoids are important for their biological activities and that the chemopreventive effect of the all-E-isomers of these retinoids correlates well with their capacity to bind to RARs and activate RAR/RXR-mediated transcription.

  DOI：

  10.1021/jm9603126
• 作为产物：
  描述：

  3-甲基-4-膦酰丁烯酸三乙酯 在 喹啉 、 六甲基磷酰三胺 、 manganese(IV) oxide 、 N-溴代丁二酰亚胺(NBS) 、 lithium aluminium tetrahydride 、 sodium hydride 、 碳酸氢钠 、 calcium oxide 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 13.5h， 生成 (E,4E)-4-cyclohex-2-en-1-ylidene-3-methylbut-2-enal
  参考文献：
  名称：

  Conformationally Defined 6-s-trans-Retinoic Acid Analogs. 3. Structure−Activity Relationships for Nuclear Receptor Binding, Transcriptional Activity, and Cancer Chemopreventive Activity

  摘要：

  We recently demonstrated that conformationally defined 6-s-trans-retinoic acid (RA) analogs were effective in the prevention of skin papillomas (Vaezi et al. J. Med. Chem. 1994, 37, 4499-4507) and selective agonists for nuclear receptor binding and activation (Alam et al. J. Med. Chem. 1995, 38, 2302-2310). In order to probe important structure-activity relationships, we evaluated a homologous series of four 6-s-trans-retinoids that are 8-(2'-cyclohexen-1'-ylidene)-3,7-dimethyl-2,4,6-octatrienoic acids with different substituents at 2' (R(2)) and 3' (R(1)) positions on the cyclohexene ring. UAB1 (R(1) = R(2) = H), UAB4 (R(1) = R(2) = Me), UAB7 (R(1) = Me, R(2) = iPr), and UAB8 (R(1) = Et, R(2) = iPr) contain alkyl R groups that mimic, to different extents, portions of the trimethylcyclohexenyl ring of RA. Both 9Z- and all-E-isomers of these retinoids were evaluated in binding assays for cellular retinoic acid-binding proteins (CRABP-I and CRABP-II), a nuclear retinoic acid receptor (RAR alpha), and a nuclear retinoid X receptor (RXR alpha). The all E-isomers of UAB retinoids bound tightly to CRABPs and RAR alpha, the binding affinity of the all-E-isomer increased systematically from UAB1 to UAB8, and binding for the latter was comparable to that of all-E-RA. In contrast to RA, the (9Z)-UAB retinoids were at least 200-fold less active than the all-E-isomers in binding to RAR alpha. The (9Z)-UAB isomers exhibited increasingly stronger binding to RXR alpha, and (9Z)-UAB8 was nearly as effective as (9Z)-RA in binding affinity. The retinoids were also evaluated in gene expression assays mediated by RAR alpha and RXR alpha homodimers or RAR alpha/RXR alpha heterodimers. Consistent with the binding affinities, the (all-E)-UAB retinoids activated gene transciption mediated by RAR alpha homodimers or RAR alpha/RXR alpha heterodimers, while the (9Z)-UAB isomers activated only the RXR alpha homodimer-mediated transcription. The all-E- and 9Z-isomers of the UAB retinoids were further evaluated for their capacity to prevent the induction of mouse skin papillomas. When compared to RA, only the (all-E)-UAB retinoids containing bulky R(1) and R(2) groups were effective in this chemoprevention assay. (9Z)-RA displayed equal capacity as RA to prevent papillomas, while the 9Z-isomers of the UAB retinoids were much less effective. Taken together, these studies demonstrate that the cyclohexenyl ring substituents of 6-s-trans-UAB retinoids are important for their biological activities and that the chemopreventive effect of the all-E-isomers of these retinoids correlates well with their capacity to bind to RARs and activate RAR/RXR-mediated transcription.

  DOI：

  10.1021/jm9603126