反应详情

A mixture of 620 mg (1.6 mmoles) of 4-bromo-5-methyl-6-[4-(1,2,3,4-tetrahydro-1,8-naphthyridin-7-yl)-1-piperidinyl]-pyrimidine, 565 mg (1.92 mmoles) of (1,1-dimethylethyl)3-amino-N-[(phenylmethoxy)carbonyl]alaninate (prepared according to J. Med. Chem.(2001), 44(8), 1158-1176), 340 mg (2.25 mmoles) of caesium fluoride, 73 mg (0.08 mmoles) of tris(dibenzylideneacetone) dipalladium(0), 100 mg (0.16 mmoles) of S(−)2,2′-bis(diphenyl-phosphino)-1,1′-binaphthyl in 50 ml of dioxane is heated under reflux for 5 hours. After cooling down another 280 mg (0.96 mmoles) of (1,1-dimethylethyl)3-amino-N-[(phenylmethoxy)carbonyl]alaninate, 340 mg (2.25 mmoles) of caesium fluoride, 73 mg (0.08 mmoles) of tris(dibenzylideneacetone) dipalladium(0),and 100 mg (0.16 mmoles) of S(−)2,2′-bis(diphenyl-phosphino)-1,1′-binaphthyl are then added and the reaction mixture is heated under reflux for 5 hours. The reaction mixture is evaporated to dryness under reduced pressure (2 kPa) and the residue is taken up in ethyl acetate, water and a saturated solution of sodium bicarbonate. The organic phase is separated, dried over magnesium sulphate and the solvent is evaporated off under reduced pressure (2 kPa). The residue is chromatographed a first time on silicagel eluting with a gradient of ethyl acetate-methylene chloride-triethylamine-methanol from 50-50-0-0 to 50-50-2-2. The product obtained is chromatographed a second time on alumina eluting with a mixture of heptane-methylene chloride 50-50 then with ethyl acetate-diisopropyl ether 50-50. 360 mg (Yield=37%) of expected product is obtained in the form of an amorphous white solid.

1. temperatureis heated
2. temperatureunder reflux for 5 hours
3. additionare then added
4. temperaturethe reaction mixture is heated
5. temperatureunder reflux for 5 hours
6. customThe reaction mixture is evaporated to dryness under reduced pressure (2 kPa)
7. customThe organic phase is separated
8. dry with materialdried over magnesium sulphate
9. customthe solvent is evaporated off under reduced pressure (2 kPa)
10. customThe residue is chromatographed a first time
11. washon silicagel eluting with a gradient of ethyl acetate-methylene chloride-triethylamine-methanol from 50-50-0-0 to 50-50-2-2
12. customThe product obtained
13. customis chromatographed a second time on alumina eluting
14. additionwith a mixture of heptane-methylene chloride 50-50