Reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C@H:8]2[C@@H:12]([C:13]3[CH:18]=[CH:17][C:16]([Cl:19])=[CH:15][CH:14]=3)[NH:11][C:10]([C:20]3[S:21][CH:22]=[CH:23][C:24]=3[O:25][CH2:26][CH3:27])=[N:9]2)=[CH:4][CH:3]=1.[C:28](Cl)([Cl:30])=[O:29]>>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C@H:8]2[C@@H:12]([C:13]3[CH:14]=[CH:15][C:16]([Cl:19])=[CH:17][CH:18]=3)[N:11]([C:28]([Cl:30])=[O:29])[C:10]([C:20]3[S:21][CH:22]=[CH:23][C:24]=3[O:25][CH2:26][CH3:27])=[N:9]2)=[CH:6][CH:7]=1Participants
3
Procedure
Using the procedure as described in example 1, cis-4,5-bis-(4-chloro-phenyl)-2-(3-ethoxy-thiophen-2-yl)-4,5-dihydro-1H-imidazole was reacted with phosgene to give cis-4,5-bis-(4-chloro-phenyl)-2-(3-ethoxy-thiophen-2-yl)-4,5-dihydro-imidazole-1-carbonyl chloride. The enantiomers of cis-4,5-bis-(4-chloro-phenyl)-2-(3-ethoxy-thiophen-2-yl)-4,5-dihydro-imidazole-1-carbonyl chloride were separated by chiral chromatography using a Modcol spring column (50 mm×70 cm) packed with R,R-Whelk-O1 spherical Kromasil silica gel (Regis Technologies, eluent: 30% methylene chloride in hexane, flowrate: 85 mL/min) to give the desired 2-{4-[(4S,5R)-4,5-bis-(4-chloro-phenyl)-2-(3-ethoxy-thiophen-2-yl)-4,5-dihydro-imidazole-1-carbonyl chloride.
Sources & evidence
- ORD record
- ord-39842b3518e641908b261dabd800d981
- Source dataset
- uspto-grants-2010_04
- Patent number
- US07705007B2
Linked notes
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