反应详情

温度

50 °C

A mixture of 12 (150 mg) and saturated ethanolic ammonia (50 mL) was heated at 50° C. in a glass-lined stainless steel pressure vessel for 48 hours. The reaction mixture was evaporated to dryness to afford a syrup which was purified on two silica gel thick plates (Analtech, GF, 1000 μm) that were developed in 99:1CHCl3 -MeOH. The product was eluted with CHCl3 and evaporated. The residue was crystallized from EtOAc-cyclohexane to give pure 15 (125 mg, 86%); mp. 123°-125° C.; FAB MS 524 (M+H)+ ; 1H NMR (CDCl3) δ 8.14 (s, 1, H-8), 7.72 (m, 4, ArH), 7.42 (m, 6, ArH), 6.02 (brs, 2, NH2), 6.16 (m, i'-H), 3.93 (m, 1, 5'-H), 3.84 (m, 1, 5'-H), 3.73 (m, 1, 4'-H), 2.36 (m, 2, 2'-H), 2.18 (m, 1, 3'-H), 1.90 (m, 1, 3'-H), 1.1 (s, 9, t-butyl).

1. customThe reaction mixture was evaporated to dryness
2. customto afford a syrup which
3. customwas purified on two silica gel thick plates (Analtech, GF, 1000 μm) that
4. washThe product was eluted with CHCl3
5. customevaporated
6. customThe residue was crystallized from EtOAc-cyclohexane