(1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)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 trifluoromethanesulfonate → methyl 1-acetamido-4-((1R,3aS,5aR,5bR,7aR,11aS,11bR,13aR,13bR)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)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)cyclohex-3-enecarboxylate

Participants

Reaction Steps

The title compound was prepared following the method described in step 1 for the preparation of Example 1, using (1R,3aS,5aR,5bR,7aR,11aR,11bR,13aR,13bR)-3a-((2-(1,1-dioxidothiomorpholino)ethyl)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 trifluoromethanesulfonate and methyl 1-acetamido-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclohex-3-enecarboxylate as the reactants. The product was obtained as a mixture of diastereomers in 65.7% yield. MS: m/e 766.8 (M+H)+, 2.72 min (method 3). 1H NMR (400 MHz, CHLOROFORM-d) δ 5.82 (d, J=3.0 Hz, 1H), 5.26 (br. s., 1H), 5.21-5.12 (m, 1H), 4.70 (d, J=2.0 Hz, 1H), 4.58 (d, J=1.3 Hz, 1H), 3.78-3.68 (m, 3H), 3.14-2.90 (m, 7H), 2.75-2.42 (m, 6H), 2.40-2.19 (m, 3H), 2.13-2.05 (m, 1H), 1.98 (d, J=2.0 Hz, 3H), 1.95-1.69 (m, 6H), 1.68 (s, 3H), 1.65-1.30 (m, 7H), 1.25 (m, 11H), 1.10-1.01 (m, 6H), 0.98-0.87 (m, 6H), 0.87-0.83 (m, 3H).

Provenance & Evidence