methyl 1,4-dihydro-1--7-methoxynaphthalene-1-carboxylate | 121429-75-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: methyl 1,4-dihydro-1--7-methoxynaphthalene-1-carboxylate
• 英文别名: methyl 1-[tert-butyl(methyl)sulfamoyl]-7-methoxy-4H-naphthalene-1-carboxylate
• CAS: 121429-75-2
• 化学式: C₁₈H₂₅NO₅S
• 分子量: 367.466
• InChiKey: NVOPUNVSUQFWTR-UHFFFAOYSA-N

物化性质

• 熔点：
  90-92 °C
• 沸点：
  473.9±55.0 °C(Predicted)
• 密度：
  1.24±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.24
• 重原子数：
  25.0
• 可旋转键数：
  4.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  72.91
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  methyl 1,4-dihydro-1--7-methoxynaphthalene-1-carboxylate 生成 7-Methoxy-naphthoesaeure-(1)-methylester
  参考文献：
  名称：

  Metal-ammonia reduction and reductive alkylation of N-alkylnaphthalenesulfonamides. A new route to substituted naphthalenes

  摘要：

  Conditions have been found for 1,4-reduction of aromatic sulfonamides (conveniently monitored by electrical conductivity), using metals in THF/liquid ammonia on the pre-formed N-lithium salts (BuLi), without concomitant C-S reductive cleavage. The resulting 1,4-dihydro compounds could be alkylated, either in situ (in the case of simple unfunctionalized halides only) or, following isolation, after further N-alkylation and then forming the monoanion, or after forming the dianion of the N-monoalkylated dihydrosulfonamide, generally using as base n-butyllithium (a simple titration procedure). In the former case functionalized electrophiles (bromo esters, chloroformates) could be utilized. The ratio of alpha- to gamma-alkylation was dependent on the method of alkylation, the reaction medium, the nature of the N-alkyl group(s), and whether a monoanion or a dianion served as substrate. Gamma-Alkylation products could in some cases be further alpha-substituted. The alpha-substituted products aromatized, with loss of SO2 and amine, by heating, whereas gamma-substitution products required hydrolysis by aqueous alkali; this greatly facilitated separation where mixtures were formed. Thus, this dihydrosulfonamide route constitutes a novel and nucleophilic route to 1-substituted, 2-substituted, and, notably, 1,3-disubstituted naphthalenes.

  DOI：

  10.1021/jo00035a018
• 作为产物：
  描述：

  1,4-dihydro-7-methoxy-N-(1',1'-dimethylethyl)naphthalene-1-sulfonamide 在 正丁基锂 作用下， 反应 3.67h， 生成 methyl 1,4-dihydro-1--7-methoxynaphthalene-1-carboxylate
  参考文献：
  名称：

  Metal-ammonia reduction and reductive alkylation of N-alkylnaphthalenesulfonamides. A new route to substituted naphthalenes

  摘要：

  Conditions have been found for 1,4-reduction of aromatic sulfonamides (conveniently monitored by electrical conductivity), using metals in THF/liquid ammonia on the pre-formed N-lithium salts (BuLi), without concomitant C-S reductive cleavage. The resulting 1,4-dihydro compounds could be alkylated, either in situ (in the case of simple unfunctionalized halides only) or, following isolation, after further N-alkylation and then forming the monoanion, or after forming the dianion of the N-monoalkylated dihydrosulfonamide, generally using as base n-butyllithium (a simple titration procedure). In the former case functionalized electrophiles (bromo esters, chloroformates) could be utilized. The ratio of alpha- to gamma-alkylation was dependent on the method of alkylation, the reaction medium, the nature of the N-alkyl group(s), and whether a monoanion or a dianion served as substrate. Gamma-Alkylation products could in some cases be further alpha-substituted. The alpha-substituted products aromatized, with loss of SO2 and amine, by heating, whereas gamma-substitution products required hydrolysis by aqueous alkali; this greatly facilitated separation where mixtures were formed. Thus, this dihydrosulfonamide route constitutes a novel and nucleophilic route to 1-substituted, 2-substituted, and, notably, 1,3-disubstituted naphthalenes.

  DOI：

  10.1021/jo00035a018

文献信息

• Metal-ammonia reduction and reductive alkylation of naphthalene sulphonamides. A new route to substituted naphthalenes.
  作者：L. Gottlieb、H.J.E. Loewenthal

  DOI：10.1016/s0040-4039(00)80526-2

  日期：1988.1

  Conditions have been found for the successful Birch reduction and reductive alkylation of N-alkyl arylsulphonamides, specifically in the naphthalene series. The derived C-alkylation products smoothly fragment on heating with re-aromatisation, affording a new specific route to 1-substituted naphthalenes starting from the 1-sulphonamides, and to both 2-mono-substituted and 2,4- (or 1,3-) disubstituted

  已经发现成功地使N-烷基芳基磺酰胺的Birch还原和还原性烷基化的条件，特别是在萘系列中。衍生的C-烷基化产物在加热后随着重新芳构化而平滑地断裂，从而提供了一条新的特定路线，从1-磺酰胺类化合物到1-取代的萘，再到2-单取代和2,4-（或1,3） -）来自相应的2-磺酰胺的二取代的萘。
• GOTTLIEB, L.;LOEWENTHAL, H. J. E., TETRAHEDRON LETT., 29,(1988) N 35, C. 4473-4476
  作者：GOTTLIEB, L.、LOEWENTHAL, H. J. E.

  DOI：——

  日期：——