反应详情

To a solution of 75 mg (0.124 mmol) of tert-butyl (2R,5R)-2-(4-{[(2-amino-1,3-thiazol-4-yl)acetyl]amino}-3-bromobenzyl)-5-[(R)-hydroxy(phenyl)methyl]pyrrolidine-1-carboxylate (from Step A, Example 313) in 2.0 mL DCM was added 1.0 mL TFA and the reaction mixture stirred at room temperature for 2 h. Azeotrop with toluene (2×) to excess acid. The residue was then taken up in acetonitrile/water/MeOH (9:1:1) and purified on the Gilson HPLC eluting with a 10-90% gradient of acetonitrile/water with 0.05% TFA buffer. The fractions containing the product were combined, frozen, and lyophilized to give a white foam (56 mg, 90%). m/z (ES) 501 (M)+ and 503 (M+2)+, also 523 (MNa)+ and 525 (MNa+2)+.

1. custompurified on the Gilson HPLC
2. washeluting with a 10-90% gradient of acetonitrile/water with 0.05% TFA buffer
3. additionThe fractions containing the product
4. temperaturefrozen