反应详情

温度

90 °C

Methyl 4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-amino-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,11,11a,11b,12,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-yl)cyclohexa-1,3-dienecarboxylate (200 mg, 0.366 mmol) and (vinylsulfonyl)benzene (80 mg, 0.476 mmol) were dissolved in toluene (1 mL). The solution was warmed to 90° C. for 9 hours. The crude reaction mixture was applied onto a 12 gm silica gel column, purified with 0-10% ethyl acetate/hexanes as eluent to afford the title compound as a white solid (100 mg, 0.14 mmole, 38.2%). MS: m/e 714.53 (M+H)+, 2.46 min (method 2). 1H NMR (400 MHz, CHLOROFORM-d) δ 8.03-7.89 (m, 2H), 7.73-7.66 (m, 1H), 7.66-7.57 (m, 2H), 7.08-7.01 (m, 1H), 5.83 (d, J=5.5 Hz, 1H), 5.30 (d, J=1.8 Hz, 1H), 4.70 (d, J=2.5 Hz, 1H), 4.65-4.55 (m, 1H), 3.82-3.71 (m, 3H), 3.42-3.24 (m, 2H), 3.03-2.86 (m, 1H), 2.86-2.70 (m, 1H), 2.56-2.40 (m, 3H), 2.40-2.26 (m, 1H), 2.09-2.00 (m, 1H), 1.98-1.85 (m, 1H), 1.85-1.73 (m, 2H), 1.71-1.67 (m, 3H), 1.67-1.38 (m, 7H), 1.37-1.11 (m, 12H), 1.10-1.07 (m, 3H), 1.04-1.01 (m, 3H), 0.98 (d, J=3.3 Hz, 3H), 0.97-0.94 (m, 3H), 0.92-0.89 (m, 3H).

1. customThe crude reaction mixture
2. custompurified with 0-10% ethyl acetate/hexanes as eluent