ethyl (E)-8-iodo-2-octenoate | 98202-50-7

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: ethyl (E)-8-iodo-2-octenoate
• 英文别名: ethyl 8-iodo-2-octenoate；ethyl (E)-8-iodooct-2-enoate
• CAS: 98202-50-7
• 化学式: C₁₀H₁₇IO₂
• 分子量: 296.148
• InChiKey: OONWKFXECPEVPD-SOFGYWHQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  13
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.7
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  ethyl (E)-8-iodo-2-octenoate 、 lithium N-benzyltrimethylsilylamide 以 四氢呋喃 、 六甲基磷酰三胺 为溶剂， 以73%的产率得到Ethyl trans-2-(N-Benzylamino)cycloheptanecarboxylate
  参考文献：
  名称：

  New type of cyclization of .alpha.,.beta.,.chi.,.psi.-unsaturated dioic acid esters through tandem conjugate additions by using lithium N-benzyl-N-(trimethylsilyl)amide as a nitrogen nucleophile

  摘要：

  Treatment of dimethyl (2E,6E)-2,6-octadienedioate with lithium N-benzyl-N-(trimethylsilyl)amide (LSA) gave 5-exo-trig ring closure products, methyl 3-(N-benzylamino)-2-(methoxycarbonyl)cyclopentane-1-acetates, through tandem conjugate additions. The related 6-exo-trig cyclization proceeded stereoselectively to give ethyl c-3-(N-benzylamino)-t-2-(ethoxycarbonyl)cyclohexane-1-acetate. In contrast with the 5- and 6-exo-trig cyclization, no 7-exo-trig cyclization occurred. The 5-exo-trig cyclization products were converted into 2-(methoxycarbonyl)-2-cyclopentene-1-carboxylic acid methyl ester in an excellent yield. 5-exo-trig cyclization of the unsymmetrical dienedioate consisting of crotonate and (E)-2-methyl-2-butenoate units proceeded regioselectively through conjugate addition of LSA to the crotonate part. Similar regioselectively was observed in the case of 5-exo-trig cyclization of the dienedioate possessing crotonate and (E)-3-methyl-2-pentenoate units. Total syntheses of the physiologically active cyclopentane monoterpenes (+/-)-dihydronepetalactone and (+/-)-isohydronepetalactone has been accomplished by this cyclization strategy. In addition, it has been demonstrated that LSA is a more efficient nitrogen nucleophile than LDA to cyclize omega-halo-alpha,beta-unsaturated esters.

  DOI：

  10.1021/jo00037a034
• 作为产物：
  描述：

  6-氯-1-己醇 在 sodium iodide 作用下， 以 丙酮 为溶剂， 反应 12.0h， 生成 ethyl (E)-8-iodo-2-octenoate
  参考文献：
  名称：

  Tandem SN2-Michael reactions for the preparation of simple five- and six-membered-ring nitrogen and sulfur heterocycles

  摘要：

  A one-pot tandem S(N)2-Michael addition sequence has been developed for the preparation of five-membered- and six-membered-ring nitrogen and sulfur heterocycles from 6- or 7-halo-2-alkenoate esters. Nitrogen-containing rings are prepared by reaction of the omega-halo-2-alkenoate ester with a primary amine in the presence of triethylamine. The sulfur analogues are generated by thiourea displacement of the halide followed by base hydrolysis of the isothiouronium salt. Yields are routinely in the 60-80% range. Experiments are described which elucidate the chronology of the reaction sequences. Ring size and steric hindrance to the initial substitution reaction appear to be the only limitations of the procedure.

  DOI：

  10.1021/jo00032a025

文献信息

• a highly stereoselective synthesis of carbocyclic compounds by the michael induced intramolecular alkylation a stereocontrol of extracyclic chiral centers
  作者：Masahiko Yamaguchi、Michinori Tsukamoto、Ichiro Hirao

  DOI：10.1016/s0040-4039(00)98322-9

  日期：1985.1

  Three, five, six, and seven-membered carbocyclic compounds, some of which contain an extracyclic chiral center, were synthesized highly stereo-selectively by the Michael induced intramolecular alkylation.

  通过迈克尔诱导的分子内烷基化，高度立体选择性地合成了三元，五元，六元和七元碳环化合物，其中一些含有环外手性中心。
• YAMAGUCHI, MASAHIKO;TSUKAMOTO, MICHINORI;HIRAO, ICHIRO, TETRAHEDRON LETT., 1985, 26, N 14, 1723-1726
  作者：YAMAGUCHI, MASAHIKO、TSUKAMOTO, MICHINORI、HIRAO, ICHIRO

  DOI：——

  日期：——
• Tandem SN2-Michael reactions for the preparation of simple five- and six-membered-ring nitrogen and sulfur heterocycles
  作者：Richard A. Bunce、Christopher J. Peeples、Paul B. Jones

  DOI：10.1021/jo00032a025

  日期：1992.3

  A one-pot tandem S(N)2-Michael addition sequence has been developed for the preparation of five-membered- and six-membered-ring nitrogen and sulfur heterocycles from 6- or 7-halo-2-alkenoate esters. Nitrogen-containing rings are prepared by reaction of the omega-halo-2-alkenoate ester with a primary amine in the presence of triethylamine. The sulfur analogues are generated by thiourea displacement of the halide followed by base hydrolysis of the isothiouronium salt. Yields are routinely in the 60-80% range. Experiments are described which elucidate the chronology of the reaction sequences. Ring size and steric hindrance to the initial substitution reaction appear to be the only limitations of the procedure.
• New type of cyclization of .alpha.,.beta.,.chi.,.psi.-unsaturated dioic acid esters through tandem conjugate additions by using lithium N-benzyl-N-(trimethylsilyl)amide as a nitrogen nucleophile
  作者：Tadao Uyehara、Naomi Shida、Yoshinori Yamamoto

  DOI：10.1021/jo00037a034

  日期：1992.5

  Treatment of dimethyl (2E,6E)-2,6-octadienedioate with lithium N-benzyl-N-(trimethylsilyl)amide (LSA) gave 5-exo-trig ring closure products, methyl 3-(N-benzylamino)-2-(methoxycarbonyl)cyclopentane-1-acetates, through tandem conjugate additions. The related 6-exo-trig cyclization proceeded stereoselectively to give ethyl c-3-(N-benzylamino)-t-2-(ethoxycarbonyl)cyclohexane-1-acetate. In contrast with the 5- and 6-exo-trig cyclization, no 7-exo-trig cyclization occurred. The 5-exo-trig cyclization products were converted into 2-(methoxycarbonyl)-2-cyclopentene-1-carboxylic acid methyl ester in an excellent yield. 5-exo-trig cyclization of the unsymmetrical dienedioate consisting of crotonate and (E)-2-methyl-2-butenoate units proceeded regioselectively through conjugate addition of LSA to the crotonate part. Similar regioselectively was observed in the case of 5-exo-trig cyclization of the dienedioate possessing crotonate and (E)-3-methyl-2-pentenoate units. Total syntheses of the physiologically active cyclopentane monoterpenes (+/-)-dihydronepetalactone and (+/-)-isohydronepetalactone has been accomplished by this cyclization strategy. In addition, it has been demonstrated that LSA is a more efficient nitrogen nucleophile than LDA to cyclize omega-halo-alpha,beta-unsaturated esters.