[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:13][CH2:12][NH:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1.[C:14]([OH:17])(=O)[CH3:15].C1(NC2C3[S:45][CH2:44][CH2:43][C:27]=3[N:28]=[C:29](N3CCN(C4C=CC=CC=4)CC3)[N:30]=2)CCCCC1>O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([N:8]2[CH2:13][CH2:12][N:11]([C:29]3[N:30]=[C:14]([OH:17])[C:15]4[S:45][CH2:44][CH2:43][C:27]=4[N:28]=3)[CH2:10][CH2:9]2)=[CH:6][CH:7]=11.9 g (9.66 mmol) of 1-(4-chlorophenyl)piperazine is placed in 0.55 mL (9.62 mmol) of glacial acetic acid and heated to 180° C. in the heating block. 0.800 g (3.73 mmol) of 2-ethylsulfanyl-6,7-dihydrothieno[3,2-d]pyrimidin-4-ol (I) is added, then the mixture is left to stand for 1.5 hours at 180° C. and 16 hours at ambient temperature. Then the reaction mixture is combined with water and treated in the ultrasound bath. The precipitate is suction filtered, washed, and dried. 1.25 g of product II is obtained and used further in the crude state.
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