trans-5-Fluoro-2-pentenal | 166819-20-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: trans-5-Fluoro-2-pentenal
• 英文别名: 5-Fluoropent-2-enal；(E)-5-fluoropent-2-enal
• CAS: 166819-20-1
• 化学式: C₅H₇FO
• 分子量: 102.108
• InChiKey: FDHXXHBCODBKSJ-HNQUOIGGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  7
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  trans-5-Fluoro-2-pentenal 在 Wilkinson's catalyst 2,6-二甲基吡啶 、 Sodium orthovanadate 、 9-芴酮 、 2,4,6-三甲基苯甲酸 、 lithium allyl oxide 、 氢氟酸 、 二异丁基氢化铝 、 N-chlorosuccinimide-dimethylsulfide complex 、 三乙胺 、 zinc dibromide 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 甲苯 、 乙腈 为溶剂， 反应 355.5h， 生成 [(2Z)-2-[(3R,4R,5R)-3,5-bis[[tert-butyl(dimethyl)silyl]oxy]-4-(3-fluoropropyl)-2-methylidenecyclohexylidene]ethyl]-diphenylphosphane
  参考文献：
  名称：

  2-Fluoroalkyl A-Ring Analogs of 1,25-Dihydroxyvitamin D3. Stereocontrolled Total Synthesis via Intramolecular and Intermolecular Diels-Alder Cycloadditions. Preliminary Biological Testing

  摘要：

  Intramolecular Diels-Alder (IMDA) cycloadditions of electron-rich trans-vinylic silaketal groups tethered via a chiral, nonracemic 1,3-butanediol auxiliary to electron-poor 2-pyrone-3-carboxylates (e.g. (R)-9, (S)-14) were promoted by zinc dibromide and proceeded unexpectedly in a stepwise, ionic fashion to form exclusively cis-4,5-disubstituted bicyclic lactones 10 and 15 with nearly complete asymmetric induction. Confirmation of the stereochemical outcome of these nonconcerted IMDA cycloadditions was achieved by H-1 NMR spectroscopy and by X-ray crystallography. Fluorinated bicycloadduct (-)-15a was converted smoothly in 13 steps into the lipophilic calcitriol analog 2 beta-(3'-flubropropyl)-1 beta,25-dihydroxyvitam D-3 ((-)-5). Intermolecular, concerted, 11 kbar, inverse-electron-demand 4 + 2-cycloaddition of bis-silylated Z-enol ether 22c, carrying two different silyl groups, with commercial methyl 2-pyrone-3-carboxylate gave in gram amounts only vicinally cis-disubstituted bicycloadduct (+/-)-23c. Chemospecific monodesilylation using sodium azide and then fluorination using Et(2)NSF(3) (DAST) gave fluoroalkyl bicyclic lactone (+/-)-25. This bicyclic lactone (+/-)-25 was transformed into fluorinated, racemic, A-ring phosphine oxide (+/-)-30 that was coupled with enantiomerically pure C,D-ring ketone (+)-21 to form enantiomerically pure diastereomers (-)-4 and (+)-4' as fluorinated, lipophilic, A-ring analogs of 1,25-dihydroxyvitamin D-3(calcitriol). Preliminary biological testing (Table I) showed that only those diastereomers having the unnatural 1 beta-hydroxyl group stereochemistry (i.e. (+)-3', (+)-4', and (-)-5) had relatively high affinities for the calf thymus vitamin D receptor and significant antiproliferative and differentiation-inducing potencies in HL-60 cells.

  DOI：

  10.1021/jo00119a045
• 作为产物：
  描述：

  trans-1,3-Bis(methylthio)-5-fluoro-1-pentene 在 calcium carbonate 、 mercury dichloride 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 20.0h， 以59%的产率得到trans-5-Fluoro-2-pentenal
  参考文献：
  名称：

  2-Fluoroalkyl A-Ring Analogs of 1,25-Dihydroxyvitamin D3. Stereocontrolled Total Synthesis via Intramolecular and Intermolecular Diels-Alder Cycloadditions. Preliminary Biological Testing

  摘要：

  Intramolecular Diels-Alder (IMDA) cycloadditions of electron-rich trans-vinylic silaketal groups tethered via a chiral, nonracemic 1,3-butanediol auxiliary to electron-poor 2-pyrone-3-carboxylates (e.g. (R)-9, (S)-14) were promoted by zinc dibromide and proceeded unexpectedly in a stepwise, ionic fashion to form exclusively cis-4,5-disubstituted bicyclic lactones 10 and 15 with nearly complete asymmetric induction. Confirmation of the stereochemical outcome of these nonconcerted IMDA cycloadditions was achieved by H-1 NMR spectroscopy and by X-ray crystallography. Fluorinated bicycloadduct (-)-15a was converted smoothly in 13 steps into the lipophilic calcitriol analog 2 beta-(3'-flubropropyl)-1 beta,25-dihydroxyvitam D-3 ((-)-5). Intermolecular, concerted, 11 kbar, inverse-electron-demand 4 + 2-cycloaddition of bis-silylated Z-enol ether 22c, carrying two different silyl groups, with commercial methyl 2-pyrone-3-carboxylate gave in gram amounts only vicinally cis-disubstituted bicycloadduct (+/-)-23c. Chemospecific monodesilylation using sodium azide and then fluorination using Et(2)NSF(3) (DAST) gave fluoroalkyl bicyclic lactone (+/-)-25. This bicyclic lactone (+/-)-25 was transformed into fluorinated, racemic, A-ring phosphine oxide (+/-)-30 that was coupled with enantiomerically pure C,D-ring ketone (+)-21 to form enantiomerically pure diastereomers (-)-4 and (+)-4' as fluorinated, lipophilic, A-ring analogs of 1,25-dihydroxyvitamin D-3(calcitriol). Preliminary biological testing (Table I) showed that only those diastereomers having the unnatural 1 beta-hydroxyl group stereochemistry (i.e. (+)-3', (+)-4', and (-)-5) had relatively high affinities for the calf thymus vitamin D receptor and significant antiproliferative and differentiation-inducing potencies in HL-60 cells.

  DOI：

  10.1021/jo00119a045

文献信息

• 2-Fluoroalkyl A-Ring Analogs of 1,25-Dihydroxyvitamin D3. Stereocontrolled Total Synthesis via Intramolecular and Intermolecular Diels-Alder Cycloadditions. Preliminary Biological Testing
  作者：Gary H. Posner、Cheon-Gyu Cho、Tizah E. N. Anjeh、Neil Johnson、Ronald L. Horst、Tadashi Kobayashi、Toshio Okano、Naoko Tsugawa

  DOI：10.1021/jo00119a045

  日期：1995.7

  Intramolecular Diels-Alder (IMDA) cycloadditions of electron-rich trans-vinylic silaketal groups tethered via a chiral, nonracemic 1,3-butanediol auxiliary to electron-poor 2-pyrone-3-carboxylates (e.g. (R)-9, (S)-14) were promoted by zinc dibromide and proceeded unexpectedly in a stepwise, ionic fashion to form exclusively cis-4,5-disubstituted bicyclic lactones 10 and 15 with nearly complete asymmetric induction. Confirmation of the stereochemical outcome of these nonconcerted IMDA cycloadditions was achieved by H-1 NMR spectroscopy and by X-ray crystallography. Fluorinated bicycloadduct (-)-15a was converted smoothly in 13 steps into the lipophilic calcitriol analog 2 beta-(3'-flubropropyl)-1 beta,25-dihydroxyvitam D-3 ((-)-5). Intermolecular, concerted, 11 kbar, inverse-electron-demand 4 + 2-cycloaddition of bis-silylated Z-enol ether 22c, carrying two different silyl groups, with commercial methyl 2-pyrone-3-carboxylate gave in gram amounts only vicinally cis-disubstituted bicycloadduct (+/-)-23c. Chemospecific monodesilylation using sodium azide and then fluorination using Et(2)NSF(3) (DAST) gave fluoroalkyl bicyclic lactone (+/-)-25. This bicyclic lactone (+/-)-25 was transformed into fluorinated, racemic, A-ring phosphine oxide (+/-)-30 that was coupled with enantiomerically pure C,D-ring ketone (+)-21 to form enantiomerically pure diastereomers (-)-4 and (+)-4' as fluorinated, lipophilic, A-ring analogs of 1,25-dihydroxyvitamin D-3(calcitriol). Preliminary biological testing (Table I) showed that only those diastereomers having the unnatural 1 beta-hydroxyl group stereochemistry (i.e. (+)-3', (+)-4', and (-)-5) had relatively high affinities for the calf thymus vitamin D receptor and significant antiproliferative and differentiation-inducing potencies in HL-60 cells.