Trifluoroacetic acid → HCID 22139438, compound

Participants

Reaction Steps

To a stirred solution of 4-(6-morpholin-4-yl-4-oxo-4H-pyran-2-yl)-phenothiazine-10-carboxylic acid tert-butyl ester (3.65 g, 7.63 mmol), in CH2Cl2 (30 ml) was added trifluoroacetic acid in a single portion. The mixture was stirred at room temperature for 20 hours whereupon the reaction was concentrated in vacuo to give a thick syrup that was basified in a dropwise fashion with saturated NaHCO3 (40 ml). The dark green mixture was then stirred at room temperature for 18 hours. The mixture was filtered and the filtrant retained, washed with water and dried to give the title compound as a dark green solid (2.89 g, 83.74% over 3 steps) m/z (LC-MS, ESP): 479 [M+H]+, RT=4.05 mins.

Provenance & Evidence