ethyl 2-<<(p-nitrophenyl)sulfonyl>oxy>-3-butenoate | 131489-46-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: ethyl 2-<<(p-nitrophenyl)sulfonyl>oxy>-3-butenoate
• 英文别名: Ethyl 2-(4-nitrophenyl)sulfonyloxybut-3-enoate
• CAS: 131489-46-8
• 化学式: C₁₂H₁₃NO₇S
• 分子量: 315.304
• InChiKey: MWFHQSARQLANTH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  124
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  ethyl 2-<<(p-nitrophenyl)sulfonyl>oxy>-3-butenoate 以 甲苯 为溶剂， 反应 24.0h， 以100%的产率得到ethyl 4-<<(p-nitrophenyl)sulfonyl>oxy>-2-butenoate
  参考文献：
  名称：

  Regiochemical control in the preparation of 2-(nosyloxy) .beta.,.gamma.-unsaturated esters and 4-(nosyloxy) .alpha.,.beta.-unsaturated esters from 1-[(trimethylsilyl)oxy]-1-alkoxy 1,3-dienes

  摘要：

  A series of 1-[(trialkylsilyl)oxy]-1-alkoxy 1,3-dienes 1a-i were found to react with p-nitrobenzenesulfonyl peroxide in the presence of sodium methoxide or zinc chloride to give alkyl 2-[[(p-nitrophenyl)sulfonyl]oxy] beta-gamma-unsaturated esters 3 and alkyl 4-[[(p-nitrophenyl)sulfonyl]oxy] alpha,beta-unsaturated esters 4 which are readily separable. The regioselectivity is determined by kinetic versus thermodynamic control. When positions 2 or 4 of the diene are unsubstituted, the 2-isomer is the major product and is the kinetically fastest formed product. It can be thermally rearranged to the more stable 4-isomer. When alkyl substituents are present at either the 2- or 4-positions, only the 4-isomer is obtained. Substitution for nosylate by amine nucleophiles occurs by an S(N)2 process. Thus 2-amino beta,gamma-unsaturated esters and 4-amino alpha,beta-unsaturated esters can be prepared from the appropriate starting nosylate.

  DOI：

  10.1021/jo00003a022
• 作为产物：
  描述：

  1-<(trimethylsilyl)oxy>-1-ethoxy-1,3-butadiene 、 4-nitrobenzenesulfonyl peroxide 在 zinc(II) chloride 作用下， 以 乙酸乙酯 为溶剂， 以40%的产率得到ethyl 2-<<(p-nitrophenyl)sulfonyl>oxy>-3-butenoate
  参考文献：
  名称：

  Regiochemical control in the preparation of 2-(nosyloxy) .beta.,.gamma.-unsaturated esters and 4-(nosyloxy) .alpha.,.beta.-unsaturated esters from 1-[(trimethylsilyl)oxy]-1-alkoxy 1,3-dienes

  摘要：

  A series of 1-[(trialkylsilyl)oxy]-1-alkoxy 1,3-dienes 1a-i were found to react with p-nitrobenzenesulfonyl peroxide in the presence of sodium methoxide or zinc chloride to give alkyl 2-[[(p-nitrophenyl)sulfonyl]oxy] beta-gamma-unsaturated esters 3 and alkyl 4-[[(p-nitrophenyl)sulfonyl]oxy] alpha,beta-unsaturated esters 4 which are readily separable. The regioselectivity is determined by kinetic versus thermodynamic control. When positions 2 or 4 of the diene are unsubstituted, the 2-isomer is the major product and is the kinetically fastest formed product. It can be thermally rearranged to the more stable 4-isomer. When alkyl substituents are present at either the 2- or 4-positions, only the 4-isomer is obtained. Substitution for nosylate by amine nucleophiles occurs by an S(N)2 process. Thus 2-amino beta,gamma-unsaturated esters and 4-amino alpha,beta-unsaturated esters can be prepared from the appropriate starting nosylate.

  DOI：

  10.1021/jo00003a022

文献信息

• HOFFMAN, ROBERT V.;KIM, HWA-OK, J. ORG. CHEM., 56,(1991) N, C. 1014-1019
  作者：HOFFMAN, ROBERT V.、KIM, HWA-OK

  DOI：——

  日期：——