反应详情

To a 250 mL round-bottom flask was added biphenyl-2-ylcarbamic acid 1-[2-(4-{[(R)-2-(3-formylamino-4-hydroxyphenyl)-2-hydroxyethylamino]methyl}-2,5-dimethylphenylcarbamoyl)ethyl]piperidin-4-yl ester L-tartaric acid salt (3.5 g) and methanol (35 mL) and the resulting mixture was stirred for 15 min. A 1:1 mixture of saturated aqueous sodium bicarbonate and water (70 mL) was added over a 5 min. period and stirring was continued for 2 hours. The resulting off-white slurry was filtered and the filter cake was washed with water (20 mL), air dried for 2 hours and then dried in a vacuum overnight to provide biphenyl-2-ylcarbamic acid 1-[2-(4-{[(R)-2-(3-formylamino-4-hydroxyphenyl)-2-hydroxyethylamino]methyl}-2,5-dimethylphenylcarbamoyl)-ethyl]piperidin-4-yl ester (2.3 g) as a semi-crystalline free base.

1. additionwas added over a 5 min. period
2. stirringstirring
3. waitwas continued for 2 hours
4. filtrationThe resulting off-white slurry was filtered
5. washthe filter cake was washed with water (20 mL), air
6. customdried for 2 hours
7. customdried in a vacuum overnight