4-Toluenesulfonyl chloride → methyl 7-(N-benzyloxycarbonylamino)-3-p-toluenesulfonyloxy-2-phenylheptanoate

Participants

Reaction Steps

The same procedures as in Example 30 were performed except that 27.2 g (70.4 mmol) of methyl 7-(N-benzyloxycarbonylamino)-3-hydroxy-2-phenylheptanoate obtained in Example 9 was dissolved in 136 ml of pyridine; 1.27 g (10.39 mmol) of dimethylaminopyridine was added; and 20.1 g (105.6 mmol) of p-toluenesulfonyl chloride was added; to prepare the target compound as a pale yellow oil in an amount 23.5 g at a yield of 61.8%. The analytical results on the target compound are given below.

Provenance & Evidence