Reaction SMILES: FC(F)(F)S(O[C:7]1[C:8]([CH3:36])([CH3:35])[C@H:9]2[C@:22]([CH3:25])([CH2:23][CH:24]=1)[C@@H:21]1[C@:12]([CH3:34])([C@@:13]3([CH3:33])[C@H:18]([CH2:19][CH2:20]1)[C@H:17]1[C@H:26]([C:29]([CH3:31])=[CH2:30])[CH2:27][CH2:28][C@:16]1([NH2:32])[CH2:15][CH2:14]3)[CH2:11][CH2:10]2)(=O)=O.CC1(C)C(C)(C)OB([C:47]2[CH2:52][CH2:51][CH:50]([C:53]([O:55][CH2:56][CH3:57])=[O:54])[CH2:49][CH:48]=2)O1.O.C(=O)([O-])[O-].[Na+].[Na+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:32][C@:16]12[CH2:28][CH2:27][C@@H:26]([C:29]([CH3:31])=[CH2:30])[C@@H:17]1[C@@H:18]1[C@@:13]([CH3:33])([CH2:14][CH2:15]2)[C@@:12]2([CH3:34])[C@@H:21]([C@:22]3([CH3:25])[C@@H:9]([CH2:10][CH2:11]2)[C:8]([CH3:35])([CH3:36])[C:7]([C:47]2[CH2:52][CH2:51][CH:50]([C:53]([O:55][CH2:56][CH3:57])=[O:54])[CH2:49][CH:48]=2)=[CH:24][CH2:23]3)[CH2:20][CH2:19]1
Reactant: CCOC(=O)C1CC=C(B2OC(C)(C)C(C)(C)O2)CC1
Reactant: C=C(C)[C@@H]1CC[C@]2(N)CC[C@]3(C)[C@H](CC[C@@H]4[C@@]5(C)CC=C(OS(=O)(=O)C(F)(F)F)C(C)(C)[C@@H]5CC[C@]43C)[C@@H]12
Agent: c1ccc([P](c2ccccc2)(c2ccccc2)[Pd]([P](c2ccccc2)(c2ccccc2)c2ccccc2)([P](c2ccccc2)(c2ccccc2)c2ccccc2)[P](c2ccccc2)(c2ccccc2)c2ccccc2)cc1
Agent: O=C([O-])[O-]
Agent: [Na+]
Solvent: O
Solvent: C1COCCO1
Product: C=C(C)[C@@H]1CC[C@]2(N)CC[C@]3(C)[C@H](CC[C@@H]4[C@@]5(C)CC=C(C6=CCC(C(=O)OCC)CC6)C(C)(C)[C@@H]5CC[C@]43C)[C@@H]12
Temperature: 85 °C
Yield: 47.3 %

Procedure:
To a sealable vial containing (1R,3aS,5aR,5bR,7aR,11aR,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 trifluoromethanesulfonate (0.25 g, 0.448 mmol) was added ethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclohex-3-enecarboxylate (0.138 g, 0.493 mmol), sodium carbonate hydrate (0.167 g, 1.345 mmol), and palladium tetrakis (0.016 g, 0.013 mmol). The mixture was diluted with 1,4-dioxane (4 mL) and water (1 mL) then was flushed with nitrogen and was sealed and heated to 85° C. in an oil bath. After 5 h of heating, the mixture was cooled to rt, diluted with water (20 mL), and extracted with ethyl acetate (3×20 mL). The organic layers were washed with brine, dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography using a 6-50% ethyl acetate in hexanes gradient and 40 g silica gel column. The fractions containing the expected product were combined and concentrated under reduced pressure to give ethyl 4-((1R,3 aS,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)cyclohex-3-enecarboxylate (0.119 g, 0.212 mmol, 47.3% yield) as an off-white solid. LCMS: m/e 562.6 (M+H)+, 2.13 min (method 1). 1H NMR (500 MHz, chloroform-d) δ=5.35 (br. s., 1H), 5.19 (d, J=6.1 Hz, 1H), 4.73 (d, J=1.9 Hz, 1H), 4.60 (s, 1H), 4.15 (q, J=7.1 Hz, 2H), 2.58-2.47 (m, 2H), 2.33-2.27 (m, 2H), 2.23-1.94 (m, 6H), 1.70 (s, 3H), 1.27 (t, 3H), 1.07 (s, 3H), 1.79-0.82 (m, 34H).