Diisopropylethylamine → HCID 178480516、化合物

関与物質

反応条件

反応手順

A screw-capped tube is charged with 2-[(3-bromophenyl)(1-methylpiperidin-4-yloxy)methyl]-5-fluoro-1H-benzimidazole (example 437D, 418 mg), palladium bis(dibenzylideneacetone) (30 mg), Xantphos (30 mg), (2-mercaptoethyl)carbamic acid tert-butyl ester (1 equivalent), diisopropylethylamine (180 μL) and 1,4-dioxane (6 mL). The tube is evacuated, filled with argon and sealed. After stirring at 120° C. overnight, the mixture is diluted with ethyl acetate and water and the aqueous phase is extracted with ethyl acetate. The pooled organic extracts are dried over magnesium sulfate and concentrated under reduced pressure. The residue is purified by chromatography (gradient dichloromethane/methanol from 98/2 to 95/5) to afford (2-{3-[(5-fluoro-1H-benzimidazol-2-yl)(1-methylpiperidin-4-yloxy)methyl]phenylsulfanyl}ethyl)carbamic acid tert-butyl ester. 1H NMR: 11.07 (sl, 1H), 7.69-7.59 (m, 1H), 7.39-7.36 (m, 1H), 7.30-7.15 (m, 2H), 7.04-6.91 (m, 2H), 5.83 (s, 1H), 5.30 (sl, 1H), 4.20 (s, 2H), 3.65-3.40 (m, 3H), 3.30-3.05 (m, 2H), 2.80-2.65 (m, 2H), 2.27 (s, 3H), 2.25-1.75 (m, 6H), 1.55 (s, 9H).

情報源と証拠