[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][NH:12][CH2:11][CH2:10][NH:9]2)=[CH:4][CH:3]=1.[C:14]([O-])([O-])=O.[Na+].[Na+].IC>O>[ClH:1].[ClH:1].[CH3:14][N:12]1[CH2:11][CH2:10][NH:9][CH:8]([C:5]2[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=2)[CH2:13]1A mixture of 10 g (0.051 mol) of 2-(4-chlorophenyl)piperazine (comparison product CP 1 of Table IV below; M.p=124° C.) 10.80 g (0.102 mol) of Na2CO3, 7.24 g (0.051 mol) of ICH3 and 100 ml of water is heated under reflux for 6 hours. It is cooled, extraction is carried out with CHCl3 and the chloroform phase is washed with water and dried over MgSO4. It is filtered, the filtrate is evaporated to dryness, the evaporation residue is taken up with CH3OH and the mixture is acidified with a solution of hydrochloric acid in ethanol. It is evaporated to dryness; recrystallization of the evaporation residue from a methanol/ethyl acetate mixture (1:1 v/v) gives 3 g (yield: 20.8%) of CRL 41 202. M.p.inst. =200° C. (decomposition).
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