Water → HCID 13646825, compound

HRID 364810Notes

Reaction equation

[Cl:1][C:2]1[C:10]([Cl:11])=[C:9]2[C:5]([CH2:6][C:7]([CH:14]3[CH2:18][CH2:17][CH2:16][CH2:15]3)([CH3:13])[C:8]2=[O:12])=[CH:4][C:3]=1[OH:19].C(=O)([O-])[O-].[K+].[K+].Br[CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34].O>CN(C)C=O>[Cl:1][C:2]1[C:10]([Cl:11])=[C:9]2[C:5]([CH2:6][C:7]([CH:14]3[CH2:18][CH2:17][CH2:16][CH2:15]3)([CH3:13])[C:8]2=[O:12])=[CH:4][C:3]=1[O:19][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34]

Participants

Conditions

Temperature: -70 °C

Procedure

6,7-Dichloro-2-cyclopentyl-2,3-dihydro-5-hydroxy-2-methyl-1H-inden-1-one (12 g., 0.04 mole) is dissolved in dimethylformamide (30 ml.), and potassium carbonate (5.5 g., 0.04 mole) is added and the mixture stirred and heated on a steam bath for 30 minutes. Ethyl 7-bromoheptanoate is added dropwise over 10 minutes with stirring and heating on a steam bath for two hours. The mixture is poured into a mixture of ice and water (300 g., total) and then extracted with ether. The ether extract is dried over Na2SO4, filtered and the ether removed at reduced pressure. The residue is dissolved in petroleum ether and cooled to -70° C. to obtain ethyl 7-[(6,7-dichloro-2-cyclopentyl-2,3-dihydro-2-methyl-1-oxo-1H-inden-5-yl)oxy]heptanoate, 17.7 g., m.p. 47°-50° C.

Workup

temperatureheated on a steam bath for 30 minutes
stirringwith stirring
temperatureheating on a steam bath for two hours
extractionextracted with ether
extractionThe ether extract
dry with materialis dried over Na2SO4
filtrationfiltered
customthe ether removed at reduced pressure
dissolutionThe residue is dissolved in petroleum ether

Sources & evidence

ORD record: ord-22ee7f4d01994d1a95d9b7a8cca1b609
Source dataset: uspto-grants-1986_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04605663

Reaction notes

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