Microwave-Assisted One-Pot Synthesis
of (Aminoalkyl)naphthols and (Aminoalkyl)quinolinols by
Using Ammonium Carbamate or Ammonium Hydrogen Carbonate
as Solid Ammonia Source
High-performance liquid chromatographic enantioseparation of Betti base analogs on a newly developed isopropyl carbamate-cyclofructan6-based chiral stationary phase
作者:Anita Aranyi、István Ilisz、Zoltán Pataj、István Szatmári、Ferenc Fülöp、Daniel W. Armstrong、Antal Péter
DOI:10.1002/chir.20968
日期:2011.8
The direct separation of the enantiomers of 1‐(α‐aminoarylmethyl)‐2‐naphthol, 1‐(α‐aminoalkyl)‐2‐naphthol, 2‐(α‐aminoarylmethyl)‐1‐naphthol analogs, and 2‐(1‐amino‐2‐methylpropyl)‐1‐naphthol) was performed on a newly developed chiralstationaryphasecontaining isopropyl carbamate‐cyclofructan6 as chiral selector, with n‐heptane/alcohol/trifluoroacetic acid as mobile phase. The effects of the mobile‐phase
1-(α-氨基芳基甲基)-2-萘酚、1-(α-氨基烷基)-2-萘酚、2-(α-氨基芳基甲基)-1-萘酚类似物和2-(1-萘酚)对映体的直接分离氨基-2-甲基丙基)-1-萘酚)以新开发的手性固定相(含有氨基甲酸异丙酯-环果聚糖6)为手性选择剂,以正庚烷/乙醇/三氟乙酸为流动相进行。研究了流动相组成、醇类和酸性改性剂的性质和浓度以及分析物的结构对保留和分离度的影响。在某些情况下,分离是在 5–40°C 的温度范围内以恒定的流动相组成进行的。热力学参数和T iso值是根据 ln k ' 或 ln α 与 1/ T的关系图计算的。 -Δ(Δ H °) 范围为 2.8 至 3.2 kJ mol -1 , -Δ(Δ S °) 范围为 7.7 至 10.1 J mol -1 K -1 ,以及 -Δ(Δ G °) 范围为 0.2 至 0.5 kJ mol −1 。发现对映体分离是由焓驱动的。在某些情况下确定的立体异构体的洗脱顺序为(
Microwave-Assisted One-Pot Synthesis
of (Aminoalkyl)naphthols and (Aminoalkyl)quinolinols by
Using Ammonium Carbamate or Ammonium Hydrogen Carbonate
as Solid Ammonia Source
作者:Ferenc Fülöp、István Szatmári
DOI:10.1055/s-0028-1083347
日期:——
Ammonium carbamate and ammonium hydrogen carbonate were used as very effective solid ammonia sources to prepare different (aminoalkyl)naphthols and (aminoalkyl)quinolinols in ethanol and water as solvents under microwave conditions in modified three-component Mannich reactions. The products were obtained in excellent yields in one-pot reactions.
Substituent Effects in the Ring–Chain Tautomerism of 1-Alkyl-3-arylnaphth[1,2-e][1,3]oxazines
作者:Diána Tóth、István Szatmári、Ferenc Fülöp
DOI:10.1002/ejoc.200600447
日期:2006.10
hydrolysis. The condensation of 7–11 with substitutedbenzaldehydes after microwave irradiation led to1-alkyl-3-aryl-2,3-dihydro-1H-naphth[1,2-e][1,3]oxazines,which proved to be three-component (rt-o-rc) tautomeric mixtures in CDCl3 at 300 K. The electronic effects of the 1-alkyl and 3-aryl groups on the tautomeric ratios could be determined for both the ringtrans–chain and the ringcis–chain equilibria