Ethanol → Enrasentan

Participants

Reaction Steps

A mixture of methyl (1SR)-1hydroxy-3-[2-(2-benzyloxyeth-1-yloxy)-4-methoxyphenyl]-1-(3,4-methylenedioxy phenyl)-5-propoxyindene-2-carboxylate (88 g, 0.141 moles) 10% palladium on carbon (21 g), 0.65L of absolute ethanol and 0.65L of ethylacetate was hydrogenated at 50 psi, 55° C. for 48 hrs. The catalyst was filtered off, and the filtrate concentrated in vacuo to give an amorphous glass. Crystallization from 350 mL of absolute ethanol gave 59.5 g (81%) of white solid; m.p. 165°-168° C.

Provenance & Evidence