Potassium Carbonate → HCID 13646821, compound

Participants

Reaction Steps

2-Cyclopentyl-6,7-dichloro-2,3-dihydro-2-methyl-hydroxy-1H-inden-1-one (12 g., 0.04 mole) is dissolved in dimethylformamide (30 ml.) and treated with potassium carbonate (5.5 g., 0.04 mole). Methyl 5-bromopentanoate (8.5 g., 0.04 mole) is added dropwise with good stirring over a period of 30 minutes. Then, the mixture is stirred and heated in a steam bath for two hours. The mixture is cooled and poured in to ice water (300 ml.). The product which solidifies upon standing is removed by filtration. The yield is 15.1 g., m.p. 83°-86° C. Upon recrystallization from petroleum ether the methyl 5-[(6,7-dichloro-2-cyclopentyl-2,3-dihydro-2- -methyl-1-oxo-1H-inden-5-yl)oxy]pentanoate melts at 85°-88° C.

Provenance & Evidence