Ethyl Acetate → methyl 6-chloro-5-{4-[3-(4-methylpiperazin-1-yl)propoxy]phenyl}-1H-indole-3-carboxyate

HRID 338349Notes

Reaction equation

[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([C:11]([O:13][CH3:14])=[O:12])=[CH:7][NH:8]2)=[CH:4][C:3]=1B1OCC(C)(C)CO1.Br[C:24]1[CH:40]=[CH:39][C:27]([O:28][CH2:29][CH2:30][CH2:31][N:32]2[CH2:37][CH2:36][N:35]([CH3:38])[CH2:34][CH2:33]2)=[CH:26][CH:25]=1.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>C1(C)C=CC=CC=1.C(O)C.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[Cl:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6]([C:11]([O:13][CH3:14])=[O:12])=[CH:7][NH:8]2)=[CH:4][C:3]=1[C:24]1[CH:40]=[CH:39][C:27]([O:28][CH2:29][CH2:30][CH2:31][N:32]2[CH2:33][CH2:34][N:35]([CH3:38])[CH2:36][CH2:37]2)=[CH:26][CH:25]=1

Participants

Conditions

Temperature: 110 °C

Procedure

A mixture of methyl 6-chloro-5-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)-1H-indole-3-carboxylate (100 mg, 0.311 mmol), 1-(3-(4-bromophenoxy)propyl)-4-methylpiperazine (130 mg, 0.373 mmol), 2.0M aqueous potassium carbonate (0.50 mL, 1.0 mmol), and Pd(dppf)Cl2 (30 mg, 0.03 mmol) in toluene/ethanol (1.44 mL/0.48 mL) was stirred at 110° C. for 2.5 hours. The mixture was poured into ethyl acetate and washed with water. The organic phase was dried over sodium sulfate, filtered, and concentrated to give a residue, which was purified by preparative TLC to give the title compound (80 mg, 75% yield) as a white solid.

Workup

washwashed with water
dry with materialThe organic phase was dried over sodium sulfate
filtrationfiltered
concentrationconcentrated
customto give a residue, which
customwas purified by preparative TLC

Sources & evidence

ORD record: ord-a939500602b34401bf70ddcfba6ea459
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08889730B2

Reaction notes

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