Sodium Carbonate → 4-Isoquinolin-4-yl-2-(6-methyl-pyridin-2-yl)-[1,8]naphthyridine

Participants

Reaction Steps

190 mg 4-chloro naphthyridine from example 3, 341 mg 4-isoquinoline boronic acid pinacole ester, 473 mg sodium carbonate were dissolved with 20 ml dioxan and 5 ml water, flushed with nitrogen, and 86 mg tetrakistriphenylphosphine palladium(0) were added. After 90 min reflux, workup as in example 20 yielded a grey-brownish oil, which was crystallized with ether to give 176 mg correct product as a brownish powder with correct LC_MS: M+H+ 349 and Rf˜1.76 min.

Provenance & Evidence