反应详情

The target compound was prepared as a pale yellow oil in an amount 3.8 g at a yield of 42.6% in the same manner as in Example 1 except that 5.7 g (22 mmol) of 5-(N-benzyloxycarbonylamino)pentanoic acid was dissolved in 23 ml of THF and 5.35 g (33 mmol) of CDI was dividedly added several times; 5.8 ml (44 mmol) of diisopropylamine and 10 ml of THF were added and 27.5 ml (44 mmol) of 1.63N BA solution was added dropwise; 6.6 ml (44 mmol) of ethyl phenylacetate instead of methyl phenylacetate was dissolved in 10 ml of THF; and 30 ml of saturated aqueous ammonium chloride solution was added to the reaction solution, the reaction was terminated, 50 g of 4N hydrochloric acid was added, and 100 ml of ethyl acetate was further added. The analytical results on the target compound are given below.

1. addition27.5 ml (44 mmol) of 1.63N BA solution was added dropwise
2. customthe reaction was terminated
3. addition50 g of 4N hydrochloric acid was added
4. addition100 ml of ethyl acetate was further added
5. customThe analytical results on the target compound