Tri-o-tolylphosphine → (E)-3-(3,3-Dimethyl-2-oxo-2,3,4,5-tetrahydro-1H-pyrido[2,3-e][1,4]diazepin-7-yl)-N-(3-isopropyl-2-propoxybenzyl)-N-methylacrylamide

A solution of N-(3-isopropyl-2-propoxybenzyl)-N-methylacrylamide (0.397 g, 1.47 mmol) in propionitrile (5 mL) and DMF (1 mL) was deoxygenated with Ar for 20 min. The solution was treated with diisopropylethylamine (0.40 mL, 2.33 mmol) and 7-bromo-3,3-dimethyl-1,3,4,5-tetrahydro-pyrido[2,3-e][1,4]diazepin-2-one (0.300 g, 1.11 mmol). The solution was deoxygenated with Ar for 20 min. Pd(OAc)2 (0.024 g, 0.111 mmol) and P(o-tol)3 (0.067 g, 0.222 mmol) were then added and the mixture deoxygenated with Ar for 20 min. The mixture was heated to reflux for 18 h, then allowed to cool. The solution was diluted with EtOAc (30 mL) and H2O (50 mL). The aqueous layer was extracted with EtOAc (3×50 mL). The combined organics were washed with brine (2×100 mL), dried over Na2SO4, filtered and concentrated to an orange oil. Purification by column chromatography (silica gel, CH2Cl2/MeOH, 100 to 95:5) gave the title compound (0.16 g, 31%) as an off-white solid and as a mixture of amide rotamers: 1H NMR (300 MHz, DMSO-d6) δ 9.80-9.77 (m, 1H), 8.40-8.35 (m, 1H), 8.01-7.91 (m, 1H), 7.55-7.48 (m, 1H), 7.31-7.20 (m, 2H), 7.10-7.03 (m, 1H), 6.88-6.85 (m, 1H), 4.81-4.66 (m, 2H), 3.90-3.83 (m, 2H), 3.77-3.69 (m, 2H), 3.32-3.25 (m, 1H), 3.12-2.90 (m, 4H), 1.81-1.77 (m, 2H), 1.31-1.28 (m, 6H), 1.19-1.17 (m, 6H), 1.06-1.01 (3H).

1. customThe solution was deoxygenated with Ar for 20 min
2. customthe mixture deoxygenated with Ar for 20 min
3. temperatureThe mixture was heated
4. temperatureto reflux for 18 h
5. temperatureto cool
6. additionThe solution was diluted with EtOAc (30 mL) and H2O (50 mL)
7. extractionThe aqueous layer was extracted with EtOAc (3×50 mL)
8. washThe combined organics were washed with brine (2×100 mL)
9. dry with materialdried over Na2SO4
10. filtrationfiltered
11. concentrationconcentrated to an orange oil
12. customPurification by column chromatography (silica gel, CH2Cl2/MeOH, 100 to 95:5)

ORDレコード

ord-f9a93c4fc4a54bf98238875aec61c756

出典データセット

uspto-grants-2011_02

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07879872B2