反应详情

To a stirred partial solution of 4-{[1-(pyridin-2-ylmethyl)-1H-indazol-5-yl]amino}quinazolin-5-ol (870 mg, 2.36 mmol), methyl (2S)-2-hydroxypropanoate (368 mg, 3.54 mmol) and triphenylphosphine (927 mg, 3.54 mmol) in DCM (20 ml) was added DTAD (814 mg, 3.54 mmol). The mixture was stirred for 1 hour, becoming a clear solution. The solution was extracted with 2N aqueous hydrogen chloride, discarding the organic phase. The aqueous phase was basified with aqueous ammonia and extracted with DCM. The organic phase was washed with brine, dried and evaporated to an oil which crystallised on trituration with ether to give methyl (2R)-2-[(4-{[1-(pyridin-2-ylmethyl)-1H-indazol-5-yl]amino}quinazolin-5-yl)oxy]propanoate (789 mg, 74%); NMR spectrum (300 MHz) 1.70 (d, 3H), 3.78 (s, 3H), 5.51 (q, 1H), 5.76 (s, 2H), 6.95 (d, 1H), 7.16 (d, 1H), 7.28 (dd, 1H), 7.37 (d, 1H), 7.69 (m, 4H), 8.16 (s, 1H), 8.43 (s, 1H), 8.52 (s, 2H), 10.48 (s, 1H); Mass spectrum MH+ 455.

1. extractionThe solution was extracted with 2N aqueous hydrogen chloride
2. extractionextracted with DCM
3. washThe organic phase was washed with brine
4. customdried
5. customevaporated to an oil which
6. customcrystallised on trituration with ether