An Efficient and Novel Synthesis of Fused Thiazol-2(3H)-ones
摘要:
Reaction of o-bromo aromatic amines (2, 4, 7, 10, 15) with ethyl potassium xanthate gave the corresponding fused thiazol-2(3H)-thiones (16, 19, 22) which in turn were first alkylated with methyl iodide and then treated with sodium methoxide to produce fused thiazol-2(3H)-ones (18, 21, 24). Treatment of 4-(4-pyridinyl)-benzenamine dihydrobromide (1) with DMSO gave 2-bromo-4-(4-pyridinyl)benzenamine (2). Reduction of 4-(4-bromo-3-nitrophenyl)-pyridine (3) with stannous chloride gave 2-bromo-5-(4-pyridinyl)-benzenamine (4). Treatment of 5-bromo-2-methyl[3,4'-bipyridin]-6(1H)-one (5) with phosphorous oxychloride and ammonia sequentially yielded amino compound (7). Hofmann reaction of 2-chloro-6-methyl-[3,4'-bipyridine]-3-carboxamide resulted in amino compound (10). 5-Acyl-6-methylpyridin-2(1H)-ones (11) were converted to 3-bromo-1,6-naphthyridin-2-amines (15) via a four-step sequence.
The present disclosure is generally directed to compounds which can inhibit AAK1 (adaptor associated kinase 1), compositions comprising such compounds, and methods for inhibiting AAK1.
The present disclosure is generally directed to compounds which can inhibit AAK1 (adaptor associated kinase 1), compositions comprising such compounds, and methods for inhibiting AAK1.