Pyridine → 7-methoxycarbonyl-2-oxohexahydro-3,5-methano-2H-cyclopenta[b]furan-6-yl 4-chlorobutyrate

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Reaction Steps

In 180 ml of tetrahydrofuran were dissolved 21.2 g of methyl 6-hydroxy-2-oxohexahydro-3,5-methano-2H-cyclopenta-[b]furan-7-carboxylate and 16.9 g of 4-chlorobutyric acid chloride. To the solution below 20° C., 9.10 g of pyridine was added dropwise. The solution was stirred at room temperature for 1 hour and combined with 40 g of a 5% aqueous solution of sodium hydrogen carbonate, followed by ordinary work-up. There was obtained 30.4 g of a crude product (crude yield 96%).

Provenance & Evidence