反应详情

2-Mesitylenesulfonyl chloride (4.96 g, 22.7 mmol) was added to a solution of N,N,N′,N′-tetramethyl-1,3-propanediamine (3.79 mL, 22.7 mmol) and the product of example 8 step (v) (6.55 g, 15.1 mmol) in THF (66 mL) and the mixture was stirred at RT for 3 h. The resulting mixture was diluted with water and extracted with EtOAc. And the combined organic solutions were washed with brine, dried and concentrated. The residue was purified via chromatography on silica to give 8.87 g of the subtitle compound as a white solid; 1H NMR (CDCl3); 6.93 (2H, s), 6.71 (1H, d), 6.41 (1H, d), 6.33 (1H, dd), 4.66 (2H, br s), 4.02 (2H, t), 3.78 (3H, s), 3.77-3.82 (2H, m), 3.75 (2H, s), 2.59 (6H, s), 2.31 (3H, s), 2.25 (3H, s), 1.93-2.01 (2H, m), 0.89 (9H, s), 0.05 (6H, s); LC-MS: m/z 616.

1. extractionextracted with EtOAc
2. washAnd the combined organic solutions were washed with brine
3. customdried
4. concentrationconcentrated
5. customThe residue was purified via chromatography on silica