Cesium carbonate → 1-[5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-5-phenyl-1H-pyrrole-2-carboxylic acid (1-isopropyl-piperidin-4-yl)-amide

Participants

Reaction Steps

To a solution of 5-phenyl-1H-pyrrole-2-carboxylic acid (1-isopropyl-piperidin-4-yl)-amide (50 mg) in DMF (2 mL) was added Cs2CO3 (105 mg). The mixture was stirred for 30 min at RT. 3-Bromomethyl-5-(5-chloro-thiophen-2-yl)-isoxazole (45 mg) was added and stirring was continued for 3 h at RT. The mixture was filtered and directly subjected to preparative HPLC(CH3CN/H2O gradient+0.05% TFA) to give 1-[5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-5-phenyl-1H-pyrrole-2-carboxylic acid (1-isopropyl-piperidin-4-yl)-amide (15 mg) as its trifluoroacetate salt. MS (ESI+): m/e=509 [M+H]+, chloro pattern.

Provenance & Evidence