反应详情

2.6 g of BOP are added to a solution cooled at 0° C. of 1.9 g of the product prepared in step 2, 1.2 g of triethylamine and 0.96 g of 3-isopropoxyphenylacetic acid in 50 ml of CH2Cl2. The reaction mixture is stirred for one hour and is then concentrated under vacuum. The residue is taken up in ethyl acetate, washed with water, dried over Na2SO4 and concentrated under vacuum. 2.2 g of the expected product is obtained, which is directly used in the next step.

1. concentrationis then concentrated under vacuum
2. washwashed with water
3. dry with materialdried over Na2SO4
4. concentrationconcentrated under vacuum