Cesium carbonate → 6-(furan-3-yl)-7-methoxy-4-[[4-(4-methylpiperazin-1-yl)anilino]methylidene]isoquinoline-1,3-dione

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-Bromo-7-methoxy-4-{[4-(4-methyl-piperazin-1-yl)-phenylamino]-methylene}-4H-isoquinoline-1,3-dione (241 mg, 0.51 mmole), N,N-dimethylformamide (2 mL), furan-3-boronic acid (143 mg, 1.28 mmole), tris(dibenzylideneacetone)dipalladium(0)-chloroform adduct (64 mg, 0.062 mmole), tri(t-butyl)phosphine (25 mg, 0.124 mmole) and cesium carbonate (334 mg, 1.02 mmole) is stirred and heated at 110° C. for one hour, cooled in the refrigerator. The reaction mixture is evaporated to dryness, taken up in 5% methanol in chlororform and passed through a short pad of Florisil eluting with 5% methanol in chloroform. The eluate is evaporated in vacuo and treated with acetonitrile, filtered and dried to give a brown solid 161 mg (68%), mp 198-220° C.; MS (ESI): m/z 459.2, 461.2 (M+H).

Provenance & Evidence