Ethanol → 6-Hydroxy-2-(4-hydroxyphenyl)-3-(4-(2-piperidinoethoxy)-benzoyl]benzo[b]thiophene Hydrochloride 1,2-Dichloroethane

HRID 989804

Reaction equation

[ClH:1].C[O:3][C:4]1[CH:5]=[CH:6][C:7]2[C:11]([C:12](=[O:28])[C:13]3[CH:18]=[CH:17][C:16]([O:19][CH2:20][CH2:21][N:22]4[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]4)=[CH:15][CH:14]=3)=[C:10]([C:29]3[CH:34]=[CH:33][C:32]([O:35]C)=[CH:31][CH:30]=3)[S:9][C:8]=2[CH:37]=1.B(Cl)(Cl)[Cl:39].C(O)C.CO>ClCCCl>[Cl:1][CH2:8][CH2:37][Cl:39].[ClH:39].[OH:3][C:4]1[CH:5]=[CH:6][C:7]2[C:11]([C:12](=[O:28])[C:13]3[CH:14]=[CH:15][C:16]([O:19][CH2:20][CH2:21][N:22]4[CH2:23][CH2:24][CH2:25][CH2:26][CH2:27]4)=[CH:17][CH:18]=3)=[C:10]([C:29]3[CH:30]=[CH:31][C:32]([OH:35])=[CH:33][CH:34]=3)[S:9][C:8]=2[CH:37]=1

Participants

Conditions

Temperature: 35 °C

Procedure

A solution of 6-methoxy-2-(4-methoxyphenyl)-3-[4-(2-piperidinoethoxy)benzoyl]benzo[b]thiophene hydrochloride (2.0 g) in 1,2-dichloroethane (20 mL) was treated with boron trichloride (2.0 mL). The resulting mixture was stirred at 35° C. for about 18 hours. A mixture of ethanol and methanol (10 mL, 95:5, 3A) was treated with the reaction mixture from above, causing the alcoholic mixture to reflux. Upon complete addition, the resulting crystalline slurry was stirred at 25° C. After one hour, the crystalline product was filtered, washed with cold ethanol (10 mL), and dried at 40° C. in vacuo to give 1.78 g of the title compound. The X-ray powder diffraction pattern is identical to that reported in Table 1.

Workup

additionwas treated with the reaction mixture from above,
temperatureto reflux
additionUpon complete addition
stirringthe resulting crystalline slurry was stirred at 25° C
waitAfter one hour
filtrationthe crystalline product was filtered
washwashed with cold ethanol (10 mL)
customdried at 40° C. in vacuo

Sources & evidence

ORD record: ord-e8ea92b8528041f484958dbcbab02358
Source dataset: uspto-grants-2002_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06458811B1

Linked notes

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