HCID 66927417, compound → HCID 86669322, compound

Participants

Reaction Steps

To a stirred solution of 3-(N-Boc-L-phenylalaninamido)-2,2-dimethylpropanol from Step 1 (2 mmol) in a mixture of pyridine/dichloromethane (5 mL:10 mL) was added a solution of phenyl 3-phenoxysulfonyl-1-propanesulfonyl chloride (Example 1 (b)) (2.2 mmol) in dichloromethane (5 mL). The reaction mixture was stirred at room temperature for 15 h, then concentrated and rediluted with ethyl acetate and aqueous hydrochloric acid (1 N). The organic phase was isolated, washed with aqueous hydrochloric acid (1 N) and concentrated. The residual material was purified by silica gel chromatography using hexanes/ethyl acetate (70:30 to 50:50) as eluent to afford 3-phenoxysulfonyl-1-propanesulfonic acid 3-(N-Boc-L-phenylalaninamido)-2,2-dimethylpropyl ester.

Provenance & Evidence