反应详情

A mixture of 2-methyl-3-[2-(1-triisopropylsilanyl-1H-indol-5-yl)-ethyl]-[1,8]naphthyridine (0.25 g, 0.74 mmol), propynoic acid methyl ester (0.07 g, 0.84 mmol), and tetrabutylammonium fluoride [1.0 M] (2.23 mL, 2.23 mmol) was stirred at room temperature overnight. The solvent was removed under reduced pressure to give a crude mixture which was purified via column chromatography with silica gel, eluting with methylene chloride/methanol (95/5) to give the title compound (66% yield) as an E/Z isomeric mixture. 1H NMR (CDCl3) δ 9.00 (m, 1H), 8.23 (s, 1H), 8.08 (m, 1H), 7.80 (m, 1H), 7.50 (d, 1H). Mass Spectrum (LCMS, ESI) calculated for C22H22N3O2 372.2 (M+H); found 372.2.

1. customThe solvent was removed under reduced pressure
2. customto give a crude mixture which
3. customwas purified via column chromatography with silica gel
4. washeluting with methylene chloride/methanol (95/5)