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Chemical Structure| 264208-58-4 Chemical Structure| 264208-58-4

Structure of 264208-58-4

Chemical Structure| 264208-58-4

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Product Details of [ 264208-58-4 ]

CAS No. :264208-58-4
Formula : C21H31NO6
M.W : 393.47
SMILES Code : O=C(N1CCC(COC2=CC=C(C(OCC)=O)C=C2OC)CC1)OC(C)(C)C
MDL No. :MFCD26394950

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Application In Synthesis of [ 264208-58-4 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 264208-58-4 ]

[ 264208-58-4 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 617-05-0 ]
  • [ 166815-96-9 ]
  • [ 264208-58-4 ]
YieldReaction ConditionsOperation in experiment
89% With potassium carbonate; In N-methyl-acetamide; d) 4-(4-Methylphenylsulphonyloxymethyl)-1-tert-butyloxycarbonylpiperidine (40 g, 0.11 mol) was added to a suspension of ethyl 3-methoxy-4-hydroxybenzoate (19.6 g, 0.1 mol) and potassium carbonate (28 g, 0.2 mol) in dry dimethylformamide (200 ml) and the reaction was heated at 95 C. for 2.5 hours. The reaction was cooled to ambient temperature, partitioned between water and ethyl acetate/diethyl ether, before the organic layer was washed with water and brine. Solvent evaporation in vacuo afforded a clear oil which crystallized on standing. Washing with isohexane and drying in vacuo yielded ethyl 3-methoxy-4-(1-tert-butyloxycarbonylpiperidin-4-ylmethoxy)benzoate (35 g, 89%) as a white solid: m.p. 81-83 C.: 1H NMR (CDCl3): 7.65 (d, 1H), 7.55 (s, 1H), 6.85 (d, 1H), 4.35 (q, 2H), 4.05-4.25 (s, 2H), 3.95 (s, 3H), 3.9 (d, 2H), 2.75 (t, 2H), 2.00-2.15 (m, 2H), 1.80-1.90 (d, 2H), 1.48 (s, 9H), 1.40 (t, 3H), 1.20-1.35 (m, 2H): MS (+ve ESI): 416 (M+Na)30 :
89% With potassium carbonate; In DMF (N,N-dimethyl-formamide); at 95℃; for 2.5h; 4-(4-Methylphenylsulphonyloxymethyl)-1-tert-butyloxycarbonylpiperidine (40g, 0.11mol) was added to a suspension of ethyl 3-methoxy-4-hydroxybenzoate (19.6g, 0.1mol) and potassium carbonate (28g, 0.2mol) in dry DMF (200ml). After stirring at 95C for 2.5 hours, the mixture was cooled to ambient temperature and partitioned between water and ethyl acetate/ether. The organic layer was washed with water, brine, dried (MgSO4) and the volatiles were removed by evaporation. The resulting oil was crystallized from petroleum ether and the suspension was stored overnight (at 5C). The solid was collected by filtration, washed with petroleum ether and dried under vacuum to give ethyl 3-methoxy-4-(1-tert-butyloxycarbonylpiperidin-4-ylmethoxy)benzoate (35g, 89%). m.p. 81-83C 1H NMR Spectrum: (CDCl3) 1.2-1.35(m, 2H); 1.4(t, 3H); 1.48(s, 9H); 1.8-1.9(d, 2H); 2.0-2.15(m, 2H); 2.75(t, 2H); 3.9(d, 2H); 3.95(s, 3H); 4.05-4.25(br s, 2H); 4.35(q, 2H); 6.85(d, 1H); 7.55(s, 1H); 7.65(d, 1H) MS (ESI): 416 [MNa]+ Elemental analysis Found C 63.4 H 8.0 N 3.5 C21H31NO6 0.3H2O Requires C 63.2 H 8.0 N 3.5%
89% With potassium carbonate; In N,N-dimethyl-formamide; at 95℃; for 2.5h; The starting material was prepared as follows: 1-(tert-Butoxycarbonyl)-4-(4-methylphenylsulphonyloxymethyl)piperidine (40g, 0.11mol), (prepared as described for the starting material in Example 1), was added to a suspension of <strong>[617-05-0]ethyl 4-hydroxy-3-methoxybenzoate</strong> (19.6g, 0.1mol) and potassium carbonate (28g, 0.2mol) in dry DMF (200ml). After stirring at 95C for 2.5 hours, the mixture was cooled to ambient temperature and partitioned between water and ethyl acetate/ether. The organic layer was washed with water, brine, dried (MgSO4) and evaporated. The resulting oil was crystallized from petroleum ether and the suspension was stored overnight at 5C. The solid was collected by filtration, washed with petroleum ether and dried under vacuum to give ethyl 4-(1-(tert-butoxycarbonyl)piperidin-4-ylmethoxy)-3-methoxybenzoate (35g, 89%). m.p. 81-83C MS (ESI): 416 [MNa]+ 1H NMR Spectrum: (CDCl3) 1.2-1.35(m, 2H); 1.4(t, 3H); 1.48(s, 9H); 1.8-1.9(d, 2H); 2.0-2.15(m, 2H); 2.75(t, 2H); 3.9(d, 2H); 3.95(s, 3H); 4.05-4.25(br s, 2H); 4.35(q, 2H); 6.85(d, 1H); 7.55(s, 1H); 7.65(d, 1H)
With potassium carbonate; In DMF (N,N-dimethyl-formamide); at 95℃; for 2.5h; The 4-amino-6-methoxy-7-(N-methylpiperidin-4-ylmethoxy)quinazoline used as a starting material was prepared as follows: A solution of di-tert-butyl dicarbonate (41.7 g) in ethyl acetate (75 ml) was added dropwise to a stirred solution of ethyl piperidine-4-carboxylate (30 g) in ethyl acetate (150 ml) which had been cooled to 0 to 5 C. in an ice-bath. The resultant mixture was stirred at ambient temperature for 48 hours. The mixture was poured into water (300 ml). The organic layer was separated, washed in turn with water (200 ml), 0.1N aqueous hydrochloric acid solution (200 ml), a saturated aqueous sodium bicarbonate solution (200 ml) and brine (200 ml), dried over magnesium sulphate and evaporated. There was thus obtained ethyl N-tert-butoxycarbonylpiperidine-4-carboxylate (48 g); NMR Spectrum: (CDCl3) 1.25 (t, 3H), 1.45 (s, 9H), 1.55-1.7 (m, 2H), 1.8-2.0 (d, 2H), 2.35-2.5 (m, 1H), 2.7-2.95 (t, 2H), 3.9-4.1 (br s, 2H), 4.15 (q, 2H). A solution of the material so obtained in THF (180 ml) was cooled at 0 C. and lithium aluminium hydride (1M solution in TBF; 133 ml) was added dropwise. The mixture was stirred at 0 C. for 2 hours. Water (30 ml) and 2N aqueous sodium hydroxide solution (10 ml) were added in turn and the mixture was stirred for 15 minutes. The resultant mixture was filtered through diatomaceous earth and the solids were washed with ethyl acetate. The filtrate was washed in turn with water and with brine, dried over magnesium sulphate and evaporated. There was thus obtained N-tert-butoxycarbonyl-4-hydroxymethylpiperidine (36.3 g); NMR Spectrum: (CDCl3) 1.05-1.2 (m, 2H), 1.35-1.55 (m, 10H), 1.6-1.8 (m, 2H), 2.6-2.8 (t, 2H), 3.4-3.6 (t, 2H), 4.0-4.2 (br s, 2H). 1,4-Diazabicyclo[2.2.2]octane (42.4 g) was added to a solution of N-tert-butoxycarbonyl-4-hydroxymethylpiperidine (52.5 g) in tert-butyl methyl ether (525 ml) and the mixture was stirred at ambient temperature for 15 minutes. The mixture was then cooled in an ice-bath to 5 C. and a solution of 4-toluenesulphonyl chloride (62.8 g) in tert-butyl methyl ether (525 ml) was added dropwise over 2 hours while maintaining the reaction temperature at approximately 0 C. The resultant mixture was allowed to warm to ambient temperature and was stirred for 1 hour. Petroleum ether (b.p. 60-80 C., 1L) was added and the precipitate was removed by filtration. The filtrate was evaporated to give a solid residue which was dissolved in diethyl ether. The organic solution was washed in turn with 0.5N aqueous hydrochloric acid solution, water, a saturated aqueous sodium bicarbonate solution and brine, dried over magnesium sulphate and evaporated. There was thus obtained N-tert-butoxycarbonyl-4-(4-toluenesulphonyloxymethyl)piperidine (76.7 g), NMR Spectrum: (CDCl3) 1.0-1.2 (m, 2H), 1.45 (s, 9H), 1.65 (d, 2H), 1.75-1.9 (m, 2H), 2.45 (s, 3H), 2.55-2.75 (m, 2H), 3.85 (d, 1H), 4.0-4.2 (br s, 2H), 7.35 (d, 2H), 7.8 (d, 2H). A portion (40 g) of the material so obtained was added to a suspension of <strong>[617-05-0]ethyl 4-hydroxy-3-methoxybenzoate</strong> (19.6 g) and potassium carbonate (28 g) in DMF (200 ml) and the resultant mixture was stirred and heated to 95 C. for 2.5 hours. The mixture was cooled to ambient temperature and partitioned between water and a mixture of ethyl acetate and diethyl ether. The organic layer was washed in turn with water and brine, dried over magnesium sulphate and evaporated. The resulting oil was crystallised from petroleum ether (b.p. 60-80 C.) and the suspension was stored overnight at 5 C. The resultant solid was collected by filtration, washed with petroleum ether and dried under vacuum. There was thus obtained ethyl 4-(N-tert-butoxycarbonylpiperidin-4-ylmethoxy)-3-methoxybenzoate (35 g), m.p. 81-83 C.; NMR Spectrum: (CDCl3) 1.2-1.35 (m, 2H), 1.4 (t, 3H), 1.48 (s, 9H), 1.8-1.9 (d, 2H), 2.0-2.15 (m, 2H), 2.75 (t, 2H), 3.9 (d, 2H), 3.95 (s, 3H), 4.05-4.25 (br s, 2H), 4.35 (q, 2H), 6.85 (d, 1H), 7.55 (s, 1H), 7.65 (d, 1H). The material so obtained was dissolved in formic acid (35 ml), formaldehyde (12M, 37% in water, 35. ml) was added and the mixture was stirred and heated to 95 C. for 3 hours. The resultant mixture was evaporated. The residue was dissolved in methylene chloride and hydrogen chloride (3M solution in diethyl ether; 40 ml) was added. The mixture was diluted with diethyl ether and the mixture was triturated until a solid was formed. The solid was collected, washed with diethyl ether and dried under vacuum overnight at 50 C. There was thus obtained ethyl 3-methoxy4(N-methylpiperidin-4-ylmethoxy)benzoate (30.6 g), NMR Spectrum: (DMSOd6) 1.29 (t, 3H), 1.5-1.7 (m, 2H), 1.95 (d, 2H), 2.0-2.15 (br s, 1H), 2.72 (s, 3H), 2.9-3.1 (m, 2H), 3.35-3.5 (br s, 2H), 3.85 (s, 3H), 3.9-4.05 (br s, 2H), 4.3 (q, 2H), 7.1 (d, 1H), 7.48 (s, 1H), 7.6 (d, 1H). The material so obtained was dissolved in methylene chloride (75 ml) and the solution was cooled in an ice-bath to 0-5 C. Trifluoroacetic acid (37.5 ml) was added followed by the dropwise addition over 15 minutes...
With potassium carbonate; In DMF (N,N-dimethyl-formamide); at 95℃; for 2.5h; A portion (40 g) of the material so obtained was added to a suspension of <strong>[617-05-0]ethyl 4-hydroxy-3-methoxybenzoate</strong> (19.6 g) and potassium carbonate (28 g) in DMF (200 ml) and the resultant mixture was stirred and heated to 95 C. for 2.5 hours. The mixture was cooled to ambient temperature and partitioned between water and a mixture of ethyl acetate and diethyl ether. The organic layer was washed in turn with water and brine, dried over magnesium sulphate and evaporated. The resulting oil was crystallised from petroleum ether (b.p. 60-80 C.) and the suspension was stored overnight at 5 C. The resultant solid was collected by filtration, washed with petroleum ether and dried under vacuum. There was thus obtained ethyl 4(N-tert-butoxycarbonylpiperidin-4-ylmethoxy)-3-methoxybenzoate (35 g), m.p. 81-83 C.; NMR Spectrum: (CDCl3) 1.2-1.35 (m, 2H), 1.4 (t, 3H), 1.48 (s, 9H), 1.8-1.9 (d, 2H), 2.0-2.15 (m, 2H), 2.75 (t, 2H), 3.9 (d, 2H), 3.95 (s, 3H), 4.05-4.25 (br s, 2H), 4.35 (q, 2H), 6.85 (d, 1H), 7.55 (s, 1H), 7.65 (d, 1H).

 

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