反应详情

To a solution of 0.11 g of 6-(4,6-di-t-butyl-5-hydroxy-2-methyl-2,3-dihydrobenzofuran-2-yl)-5-hexenoic acid synthesized in Example 77 in 10 ml of ethyl acetate was added a catalytic amount of 10% palladium-carbon, and the mixture was stirred for 24 hours under a hydrogen atmosphere. After the catalyst was filtered off, the filtrate was concentrated to give 0.10 g of 6-(4,6-di-t-butyl-5-hydroxy-2-methyl-2,3-dihydrobenzofuran-2-yl)hexanoic acid as a colorless viscous liquid (yield 90%).

1. filtrationAfter the catalyst was filtered off
2. concentrationthe filtrate was concentrated