Triethylamine → 2-{3-[4-(1,2-Benzisoxazol-3-yl)-1-piperazinyl]propyl}naphtho[1,8-cd]isothiazole 1,1-dioxide

HRID 1087503Notes

Reaction equation

Cl[CH2:2][CH2:3][CH2:4][N:5]1[C:9]2[CH:10]=[CH:11][CH:12]=[C:13]3[CH:14]=[CH:15][CH:16]=[C:7]([C:8]=23)[S:6]1(=[O:18])=[O:17].C(N(CC)CC)C.[O:26]1[C:30]2[CH:31]=[CH:32][CH:33]=[CH:34][C:29]=2[C:28]([N:35]2[CH2:40][CH2:39][NH:38][CH2:37][CH2:36]2)=[N:27]1>CN(C)C=O>[O:26]1[C:30]2[CH:31]=[CH:32][CH:33]=[CH:34][C:29]=2[C:28]([N:35]2[CH2:36][CH2:37][N:38]([CH2:2][CH2:3][CH2:4][N:5]3[C:9]4[CH:10]=[CH:11][CH:12]=[C:13]5[CH:14]=[CH:15][CH:16]=[C:7]([C:8]=45)[S:6]3(=[O:18])=[O:17])[CH2:39][CH2:40]2)=[N:27]1

Participants

Conditions

Temperature: 20 °C

Procedure

The experiment is carried out as in Example 1, starting with 2-(3-chloropropyl)naphtho[1,8-cd]isothiazole 1,1-dioxide (3.6 g), triethylamine (1.8 cc) and 4- (1,2-benzisoxazol-3-yl)piperazine (2.69) in dimethylformamide (200 cc). The mixture is heated for 8 hours at boiling point, then cooled to a temperature of about 20° C. After purification by flash-chromatography on silica gel, under a current of argon at medium pressure (0.5-1.5 bar) with dichloromethane as eluant, and recrystallization from boiling acetonitrile (30 cc), 2-{3-[4-(1,2-benzisoxazol-3-yl)-1-piperazinyl]propyl}naphtho[1,8-cd]isothiazole 1,1-dioxide (1.4 g) is obtained, m.p. 263° C.

Workup

temperatureThe mixture is heated for 8 hours
customAfter purification by flash-chromatography on silica gel
customunder a current of argon at medium pressure (0.5-1.5 bar) with dichloromethane as eluant, and recrystallization

Sources & evidence

ORD record: ord-ff1e8def737c471ea76caff00cea53e2
Source dataset: uspto-grants-1991_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05036075

Reaction notes

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