Trifluoroacetic acid → HCID 21938365, compound

HRID 2187760Notes

Reaction equation

FC(F)(F)C(O)=O.C([SiH](CC)CC)C.[CH3:15][O:16][C:17]([C:19]1[CH:20]=[C:21]2[C:25](=[CH:26][CH:27]=1)[NH:24][C:23]([CH2:28][O:29][CH3:30])=[CH:22]2)=[O:18].[Cl:31][C:32]1[CH:39]=[C:38]([Cl:40])[CH:37]=[CH:36][C:33]=1[CH:34]=O.[OH-].[Na+]>ClCCl.C(Cl)(Cl)Cl>[Cl:31][C:32]1[CH:39]=[C:38]([Cl:40])[CH:37]=[CH:36][C:33]=1[CH2:34][C:22]1[C:21]2[C:25](=[CH:26][CH:27]=[C:19]([C:17]([O:16][CH3:15])=[O:18])[CH:20]=2)[NH:24][C:23]=1[CH2:28][O:29][CH3:30]

Participants

Conditions

Temperature: 0 °C

Procedure

Trifluoroacetic acid (1.14 g) and triethylsilane (2.33 g) are dissolved in dichloromethane (10 ml), and the resulting solution is cooled at 0° C., to which is dropwise added a solution of 5-methoxycarbonyl-2-(methoxymethyl)indole (1.10 g) and 2,4-dichlorobenzaldehyde (0.96 g) dissolved in dichloromethane (20 ml). The reaction mixture is stirred at 0° C. for 3 hours, and thereafter an aqueous solution of 10% sodium hydroxide (5 ml), chloroform (40 ml) and a saturated saline solution (40 ml) are added thereto in that order for liquid-liquid separation. The organic layer is dried with anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue is purified through silica gel column chromatography (ethyl acetate/hexane=3/7) to obtain 3-(2,4-dichlorobenzyl)-5-methoxycarbonyl-2-(methoxymethyl)indole (161) (0.61 g).

Workup

customin that order for liquid-liquid separation
dry with materialThe organic layer is dried with anhydrous sodium sulfate
concentrationconcentrated under reduced pressure
customThe resulting residue is purified through silica gel column chromatography (ethyl acetate/hexane=3/7)

Sources & evidence

ORD record: ord-3bab536ecdb1412e8eff20852514cbc7
Source dataset: uspto-grants-2002_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06410584B1

Reaction notes

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