| abstract |
Disclosed is a composition comprising the compound 1-(3-tert-butyl-5-(6-hydroxynaphthalen-2-yl)-4-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione of formula (4) (or a salt therof), or the compound 6-(3-tert-butyl-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-2-methoxyphenyl)naphthalen-2-yl 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate of formula (5a) (or a salt therof). Said compounds are useful intermediates for the synthesis of dasabuvir. |