3-Bromo-4-methoxybenzoic acid → 2-(3-Bromo-4-methoxy-benzoylamino)-indane-2-carboxylic acid methyl ester

HRID 2405252Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][C:10]=1[O:11][CH3:12])[C:5]([OH:7])=O.Cl.[CH3:14][O:15][C:16]([C:18]1([NH2:27])[CH2:26][C:25]2[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=2)[CH2:19]1)=[O:17]>S(Cl)(Cl)=O.C(Cl)Cl>[CH3:14][O:15][C:16]([C:18]1([NH:27][C:5](=[O:7])[C:4]2[CH:8]=[CH:9][C:10]([O:11][CH3:12])=[C:2]([Br:1])[CH:3]=2)[CH2:26][C:25]2[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=2)[CH2:19]1)=[O:17]

Participants

Conditions

Temperature: 60 °C

Procedure

3-Bromo-4-methoxybenzoic acid (22.8 g, 98.8 mmol) was dissolved in thionyl chloride (42 ml) and stirred at 60° C. for 30 min. The volatiles were evaporated in vacuo and the residue was stripped with dioxane. The obtained acid chloride was dissolved in DCM (50 ml). 2-Amino-indane-2-carboxylic acid methyl ester hydrochloride (15.0 g, 65.9 mmol) was suspended in DCM (100 ml), EDIA (10.2 g, 79.1 mmol) was added, the mixture was cooled in an ice bath, and the solution of the acid chloride was slowly added. The mixture was stirred overnight at room temperature and evaporated to dryness. The residue was purified by silica gel chromatography (DCM/methanol gradient) and subsequent crystallization from EA to give 21.8 g of the title compound.

Workup

customThe volatiles were evaporated in vacuo
dissolutionThe obtained acid chloride was dissolved in DCM (50 ml)
additionEDIA (10.2 g, 79.1 mmol) was added
temperaturethe mixture was cooled in an ice bath
stirringThe mixture was stirred overnight at room temperature
customevaporated to dryness
customThe residue was purified by silica gel chromatography (DCM/methanol gradient) and subsequent crystallization from EA

Sources & evidence

ORD record: ord-c5323892649b4593a1e4cdfa511ef36e
Source dataset: uspto-grants-2014_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08802720B2

Reaction notes

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