Triethylamine → 1,1-Dimethylethyl(2E)-3-{4-[(4-hydroxyphenyl)(tetrahydro-4H-thiopyran-4-ylidene)methyl]phenyl}-2-propenoate

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Reagents 36 (0.32 g, 0.886 mmol), t-butyl acrylate (0.78 mL, 5.31 mmol), Pd(OAc)2 (0.042 g, 0.186 mmol), P(o-tolyl)3 (0.12 g, 0.381 mmol) and Et3N (0.74 mL, 5.31 mmol) were added to a flask containing CH3CN (13 mL) and the reaction mixture was heated at 85° C. for 24 h. The reaction mixture was allowed to cool at RT and partitioned between water and EtOAc. The organic layer was separated, washed with brine, dried (MgSO4), filtered, and the filtrate was concentrated to give the crude product. The crude product was purified by flash column chromatography on silica gel using a hexanes:EtOAc gradient (100:0 to 50:50) to give compound 37 as a yellow foam. 1H NMR (400 MHz, DMSO-d6): δ 1.46 (s, 9H), 2.65-2.66 (m, 5H), 6.45 (d, J=16 Hz, 1H), 6.68 (d, J=8.4 Hz, 2H), 6.87 (d, J=8.5 Hz, 2H), 7.09 (d, J=8.1 Hz, 2H), 7.49 (d, J=16.1 Hz, 1H), 7.60 (d, J=8.1 Hz, 2H), 9.37 (s, 1H).

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