反应详情

To prepare the compound of the Formula (Ia), 3-bromopyridin-2(1H)-one (III) is reacted with 1-fluoro-2,5-dimethyl-4-nitrobenzene (IV) to give 3-bromo-1-(2,6-dimethyl-4-nitrophenyl)pyridin-2(1H)-one (V). Then, (V) is converted with tributylvinyl tin and tetrakis(triphenylphosphine)palladium into 1-(2,6-dimethyl-4-nitrophenyl)-3-vinylpyridin-2(1H)-one (VI). Hydroboration and oxidation of (VI) produces 1-(2,6-dimethyl-4-nitrophenyl)-3-(2-hydroxyethyl)pyridin-2(1H)-one (VII). In order to protect the hydroxy group, (VII) is reacted with tert-butyl(chloro)diphenylsilane in the presence of a base, giving 3-(2-{[tert-butyl(diphenyl)silyl]oxy}ethyl)-1-(2,6-dimethyl-4-nitrophenyl)pyridin-2(1H)-one (VIII). The reduction of the nitro group in (VIII) leads to 1-(4-amino-2,6-dimethylphenyl)-3-(2-{[tert-butyl(diphenyl)silyl]oxy}ethyl)pyridin-2(1H)-one (IX). Then follows the reaction of (IX) with (S)-epoxyphthalimide (X) to give 2-[(2R)-3-({4-[3-(2-{[tert-butyl(diphenyl)silyl]oxy}ethyl)-2-oxopyridin-1(2H)-yl]-3,5-dimethylphenyl}amino)-2-hydroxypropyl]-1H-isoindole-1,3(2H)-dione (XI). Ring closure to the oxazolidinone and cleaving off the phthalimide group produces starting from (XI) 1-{4-[(5S)-5-(aminomethyl)-2-oxo-1,3-oxazolidin-3-yl]-2,6-dimethylphenyl}-3-(2-{[tert-butyl-(diphenyl)silyl]oxy}ethyl)pyridin-2(1H)-one (XII), which is reacted with 5-chlorothiophene-2-carbonyl chloride (XIII) to give N-[((5S)-3-{4-[3-(2-{[tert-butyl-(diphenyl)silyl]oxy}ethyl)-2-oxopyridin-1(2H)-yl]-3,5-dimethylphenyl}-2-oxo-1,3-oxazolidin-5-yl)methyl]-5-chlorothiophene-2-carboxamide (XIV). Cleaving off the protective group in (XIV) produces 5-chloro-N-[((5S)-3-{4-[3-(2-hydroxyethyl)-2-oxopyridin-1(2H)-yl]-3,5-dimethylphenyl}-2-oxo-1,3-oxazolidin-5-yl)methyl]thiophene-2-carboxamide (IIa), which is reacted with trans-4-aminohexanol (XV) to give 5-chloro-N-{[(5S)-3-{4-[3-{2-[(trans-4-hydroxycyclohexyl)amino]ethyl}-2-oxopyridin-1(2H)-yl]-3,5-dimethylphenyl}-2-oxo-1,3-oxazolidin-5-yl]methyl}thiophene-2-carboxamide (Ia).