4-(2-ethoxyethoxy)piperidine

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Amino-2,6-dichloro-7,8-dimethoxyquinazoline (4.9 g.), 4-(2-ethoxyethoxy)piperidine (3.2 g.) and triethylamine (10 ml.) in n-butanol (400 ml.) are heated at reflux overnight under an atmosphere of nitrogen. The mixture is then cooled, evaporated in vacuo, and the residue basified (aqueous Na2CO3) and extracted 3 times with chloroform. The combined chloroform extracts are evaporated and the residue chromatographed on neutral alumina to give the crude product which is converted to the hydrochloride salt by treatment with hydrogen chloride in ethanol to afford the title compound. C. By the above procedures the following compounds are similarly provided from the appropriate starting materials in each case. at reflux overnight under an atmosphere of nitrogen The mixture is then cooled evaporated in vacuo extracted 3 times with chloroform The combined chloroform extracts are evaporated the residue chromatographed on neutral alumina to give the crude product which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Amino-2,6-dichloro-7,8-dimethoxyquinazoline (4.9 g.), 4-(2-ethoxyethoxy)piperidine (3.2 g.) and triethylamine (10 ml.) in n-butanol (400 ml.) are heated at reflux overnight under an atmosphere of nitrogen. The mixture is then cooled, evaporated in vacuo, and the residue basified (aqueous Na2CO3) and extracted 3 times with chloroform. The combined chloroform extracts are evaporated and the residue chromatographed on neutral alumina to give the crude product which is converted to the hydrochloride salt by treatment with hydrogen chloride in ethanol to afford the title compound. C. By the above procedures the following compounds are similarly provided from the appropriate starting materials in each case. at reflux overnight under an atmosphere of nitrogen The mixture is then cooled evaporated in vacuo extracted 3 times with chloroform The combined chloroform extracts are evaporated the residue chromatographed on neutral alumina to give the crude product which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Amino-2,6-dichloro-7,8-dimethoxyquinazoline (4.9 g.), 4-(2-ethoxyethoxy)piperidine (3.2 g.) and triethylamine (10 ml.) in n-butanol (400 ml.) are heated at reflux overnight under an atmosphere of nitrogen. The mixture is then cooled, evaporated in vacuo, and the residue basified (aqueous Na2CO3) and extracted 3 times with chloroform. The combined chloroform extracts are evaporated and the residue chromatographed on neutral alumina to give the crude product which is converted to the hydrochloride salt by treatment with hydrogen chloride in ethanol to afford the title compound. C. By the above procedures the following compounds are similarly provided from the appropriate starting materials in each case. at reflux overnight under an atmosphere of nitrogen The mixture is then cooled evaporated in vacuo extracted 3 times with chloroform The combined chloroform extracts are evaporated the residue chromatographed on neutral alumina to give the crude product which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Amino-2-chloro-6,7-dimethoxyquinazoline (4.3 g.), 4-(2-ethoxyethoxy)piperidine (3.2 g.) and triethylamine (10 ml.) in n-butanol (400 ml.) were heated at reflux overnight under an atmosphere of nitrogen. The mixture was then cooled, evaporated in vacuo, and the residue basified (aqueous Na2CO3) and extracted 3 times with chloroform. The combined chloroform extracts were evaporated and the residue chromatographed on neutral alumina (150 g., Grade I, deactivated with 5 ml water). Elution with chloroform gave the crude product (3.6 g.) which was converted to the hydrochloride salt by treatment with hydrogen chloride in ethanol. The hydrochloride was then recrystallized from ethanol/isopropanol to give 4-amino-6,7-dimethoxy-2-[4-(2-ethoxyethoxy)piperidino]quinazoline hydrochloride (3.4 g.), m.p. 219°-220° C. at reflux overnight under an atmosphere of nitrogen The mixture was then cooled evaporated in vacuo extracted 3 times with chloroform The combined chloroform extracts were evaporated the residue chromatographed on neutral alumina (150 g., Grade I, deactivated with 5 ml water) Elution with chloroform gave the crude product (3.6 g.) which The hydrochloride was then recrystallized from ethanol/isopropanol

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Amino-2,6-dichloro-7,8-dimethoxyquinazoline (4.9 g.), 4-(2-ethoxyethoxy)piperidine (3.2 g.) and triethylamine (10 ml.) in n-butanol (400 ml.) are heated at reflux overnight under an atmosphere of nitrogen. The mixture is then cooled, evaporated in vacuo, and the residue basified (aqueous Na2CO3) and extracted 3 times with chloroform. The combined chloroform extracts are evaporated and the residue chromatographed on neutral alumina to give the crude product which is converted to the hydrochloride salt by treatment with hydrogen chloride in ethanol to afford the title compound. at reflux overnight under an atmosphere of nitrogen The mixture is then cooled evaporated in vacuo extracted 3 times with chloroform The combined chloroform extracts are evaporated the residue chromatographed on neutral alumina to give the crude product which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 4-Amino-2,6-dichloro-7,8-dimethoxyquinazoline (4.9 g.), 4-(2-ethoxyethoxy)piperidine (3.2 g.) and triethylamine (10 ml.) in n-butanol (400 ml.) are heated at reflux overnight under an atmosphere of nitrogen. The mixture is then cooled, evaporated in vacuo, and the residue basified (aqueous Na2CO3) and extracted 3 times with chloroform. The combined chloroform extracts are evaporated and the residue chromatographed on neutral alumina to give the crude product which is converted to the hydrochloride salt by treatment with hydrogen chloride in ethanol to afford the title compound. C. By the above procedures the following compounds are similarly provided from the appropriate starting materials in each case. at reflux overnight under an atmosphere of nitrogen The mixture is then cooled evaporated in vacuo extracted 3 times with chloroform The combined chloroform extracts are evaporated the residue chromatographed on neutral alumina to give the crude product which