N-methyl-1-morpholin-2-ylmethanamine;dihydrochloride

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 710 mg of 1-(2,4-difluorophenyl)-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 487 mg of 2-(methylaminomethyl)morpholine dihydrochloride and 1035 mg of 1,8-diazabicyclo[5.4.0]undec-7-ene in 10 ml of acetonitrile is refluxed for 21 hours. The reaction mixture is concentrated under reduced pressure and to the residue is added 10 ml of methanol. The obtained crystals are collected by filtration and washed with methanol, water and then acetone to give 1-(2,4-difluorophenyl)-7-[2-(methylaminomethyl)morpholino]-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, melting at 224°-227° C. with decomposition. The reaction mixture is concentrated under reduced pressure and to the residue is added 10 ml of methanol The obtained crystals are collected by filtration washed with methanol, water

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 710 mg of 1-(2,4-difluorophenyl)-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 487 mg of 2-(methylaminomethyl)morpholine dihydrochloride and 1035 mg of 1,8-diazabicyclo[5.4.0]undec-7-ene in 10 ml of acetonitrile is refluxed for 21 hours. The reaction mixture is concentrated under reduced pressure and to the residue is added 10 ml of methanol. The obtained crystals are collected by filtration and washed with methanol, water and then acetone to give 1-(2,4-difluorophenyl)-7-[2-(methylaminomethyl)morpholino]-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, melting at 224°-227° C. with decomposition. The reaction mixture is concentrated under reduced pressure and to the residue is added 10 ml of methanol The obtained crystals are collected by filtration washed with methanol, water

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 8.3 g of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 7.1 g of 2 -(methylaminomethyl)morpholine dihydrochloride and 15.2 g of 1,8-diazabicyclo[5.4.0]undec-7-ene in 166 ml of acetonitrile is refluxed for 8 hours. After ice-cooling, the precipitated crystals are collected by filtration, washed with acetone and recrystallized from dimethylformamide to give 1-cyclopropyl-6,8-difluoro-1,4-dihydro-7-[2-(methylaminomethyl)-morpholino]-4-oxoquinoline-3-carboxylic acid, melting at 257°-259° C. with decomposition. The corresponding hydrochloride melts at 288°-290° C. with decomposition. After ice-cooling the precipitated crystals are collected by filtration washed with acetone recrystallized from dimethylformamide

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 710 mg of 1-(2,4-difluorophenyl)-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 487 mg of 2-(methylaminomethyl)morpholine dihydrochloride and 1035 mg of 1,8-diazabicyclo[5.4.0]undec-7-ene in 10 ml of acetonitrile is refluxed for 21 hours. The reaction mixture is concentrated under reduced pressure and to the residue is added 10 ml of methanol. The obtained crystals are collected by filtration and washed with methanol, water and then acetone to give 1-(2,4-difluorophenyl)-7-[2-(methylaminomethyl)morpholino]-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, melting at 224°-227° C. with decomposition. The reaction mixture is concentrated under reduced pressure and to the residue is added 10 ml of methanol The obtained crystals are collected by filtration washed with methanol, water

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 8.3 g of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, 7.1 g of 2 -(methylaminomethyl)morpholine dihydrochloride and 15.2 g of 1,8-diazabicyclo[5.4.0]undec-7-ene in 166 ml of acetonitrile is refluxed for 8 hours. After ice-cooling, the precipitated crystals are collected by filtration, washed with acetone and recrystallized from dimethylformamide to give 1-cyclopropyl-6,8-difluoro-1,4-dihydro-7-[2-(methylaminomethyl)-morpholino]-4-oxoquinoline-3-carboxylic acid, melting at 257°-259° C. with decomposition. The corresponding hydrochloride melts at 288°-290° C. with decomposition. After ice-cooling the precipitated crystals are collected by filtration washed with acetone recrystallized from dimethylformamide