Cyclohexanol → 1h-Indole-1-carboxylic acid,5-[(cyclohexyloxy)methyl]-,1,1-dimethylethyl ester

HRID 2361896Notes

Reaction equation

[C:1]([O:5][C:6]([N:8]1[C:16]2[C:11](=[CH:12][C:13]([CH2:17]Cl)=[CH:14][CH:15]=2)[CH:10]=[CH:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH:19]1([OH:25])[CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]1>C(OCC)C>[C:6]([N:8]1[C:16]2[C:11](=[CH:12][C:13]([CH2:17][O:25][CH:19]3[CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]3)=[CH:14][CH:15]=2)[CH:10]=[CH:9]1)([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7]

Participants

Conditions

Temperature: 35 °C

Procedure

A mixture of 5-chloromethyl-indole-1-carboxylic acid tert-butyl ester (0.41 g, 1.55 mmol, 1.0 eq.), cyclohexanol (0.82 mL, 5.0 eq.) and Ag2O (1.80 g, 5.0 eq.) in diethyl ether (5 mL) was stirred at 35° C. over weekend. After cooling to room temperature, the reaction mixture was filtered through celite washing with ether. The filtrate was concentrated and the residue was purified by chromatography (3% EtOAc/hexanes) to give N-Boc-5-cyclohexyloxymethylindole (160 mg, 28%) as colorless oil. 1HNMR confirmed the compound.

Workup

temperatureAfter cooling to room temperature
filtrationthe reaction mixture was filtered
washthrough celite washing with ether
concentrationThe filtrate was concentrated
customthe residue was purified by chromatography (3% EtOAc/hexanes)

Sources & evidence

ORD record: ord-f075611821b54be785f954d0fa043f31
Source dataset: uspto-grants-2014_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08691814B2

Reaction notes

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