2-(4-methoxyphenyl)piperazine → (RS)-3-ethoxycarbonyl-7,9-difluoro-8-[3-(4-methoxyphenyl)-1-piperazinyl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine

HRID 344910Notes

Reaction equation

HRID 344910 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[C:7](=[O:24])[C:8]2[CH:9]=[C:10]3[CH:20]=[C:19]([F:21])[C:18](F)=[C:17]([F:23])[C:11]3=[N:12][C:13]=2[N:14]([CH3:16])[CH:15]=1)=[O:5])[CH3:2].[CH3:25][O:26][C:27]1[CH:32]=[CH:31][C:30]([CH:33]2[CH2:38][NH:37][CH2:36][CH2:35][NH:34]2)=[CH:29][CH:28]=1>CS(C)=O>[CH2:1]([O:3][C:4]([C:6]1[C:7](=[O:24])[C:8]2[CH:9]=[C:10]3[CH:20]=[C:19]([F:21])[C:18]([N:37]4[CH2:36][CH2:35][NH:34][CH:33]([C:30]5[CH:31]=[CH:32][C:27]([O:26][CH3:25])=[CH:28][CH:29]=5)[CH2:38]4)=[C:17]([F:23])[C:11]3=[N:12][C:13]=2[N:14]([CH3:16])[CH:15]=1)=[O:5])[CH3:2]

Participants

4

Reactant 2

HCID 27717532-(4-methoxyphenyl)piperazineHCID 194236883-Ethoxycarbonyl-7,8,9-trifluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine

Product 1

HCID 54256626(RS)-3-ethoxycarbonyl-7,9-difluoro-8-[3-(4-methoxyphenyl)-1-piperazinyl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridineYield 74.1%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
95 °C

Procedure

A suspension of 3-ethoxycarbonyl-7,8,9-trifluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine (2.5 g) and (RS)-2-(4-methoxyphenyl)piperazine (3.5 g) in dimethyl sulphoxide (40 cc) is heated with stirring to a temperature in the region of 95° C. for 2 hours. After treatment of the reaction mixture according to the conditions described in Example 39, (RS)-3-ethoxycarbonyl-7,9-difluoro-8-[3-(4-methoxyphenyl)-1-piperazinyl]-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine (2.8 g) is obtained in the form of a yellow solid, m.p. 209° C., which is used without further purification for the subsequent steps.

Workup

  1. temperatureis heated

Sources & evidence

ORD record
ord-d758b3c322be4f17b3278c3f626ff030
Source dataset
uspto-grants-1991_10
Patent number
US05053509

Reaction notes

Loading…