Water → Milveterol

HRID 502002Notes

Reaction equation

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

Participants

Conditions

Temperature: 5 °C

Procedure

In a 250 mL flask a hydrochloride salt of compound 1 having 1.52 equivalents of chlorine per mole of compound 1 (5.0 g, 9.8 mmol) was suspended in 1:1 isopropanol:water (79 mL). The slurry was heated in a stepwise fashion, from 50 ° C. to 70 ° C. in 5 ° C. increments, to dissolve the solid. The solution was allowed to cool and isopropanol (80 mL) was added in one portion. Additional isopropanol (80 mL) was added dropwise and crystal formation was observed after about 75 mL was added. The slurry was stirred at room temperature for 16 h. The crystals were isolated by filtration, washed with cold 85% isopropanol/water (10 mL) followed by isopropanol (10 mL) and dried under vacuum to yield the monohydrochloride salt of compound 1.

Workup

dissolutionto dissolve the solid
temperatureto cool
additionwas added
customThe crystals were isolated by filtration
washwashed with cold 85% isopropanol/water (10 mL)
customdried under vacuum

Sources & evidence

ORD record: ord-53fdf7f180a4410689627d27e9ec354f
Source dataset: uspto-grants-2010_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07772434B2

Reaction notes

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