Trifluoromethanesulfonic anhydride → HCID 11016069, compound

Participants

Reaction Steps

(Method L) Under an atmosphere of nitrogen, trifluoromethanesulphonic acid anhydride (1.14 ml, 6.4 mmol, 1 eq) was added dropwise to a stirred cold (0° C.) suspension of 3-chloro-6-hydroxy-8-methyl-8H-quino[4,3,2-kl]acridine, 36 (2.23 g, 6.4 mmol) in DCM (1 L). On warming to RT a green solution was formed. Aqueous work-up (water, 500 mL), separation of the organic layer, drying (MgSO4), filtering, adsorption onto silica, and column chromatography (85:15 hexane:ethyl acetate) gave the title compound as a yellow solid, (2 g, 4.3 mmol, 67%).

Provenance & Evidence