Potassium Carbonate → 3-(4-Amino-2-tert-butyl-5-methylphenylsulfanyl)-4-hydroxy-6,6-bis[2-(4-hydroxyphenyl)ethyl]-5,6-dihydropyran-2-one

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Reaction Steps

The compound was synthesized following General Method 9 using 118 mg (0.33 mmol) of 4-hydroxy-6,6-bis-[2-(4-hydroxy-phenyl)-ethyl]-5,6-dihydro-pyran-2-one (prepared in Example PP), 150 mg (0.33 mmol) of toluene-4-thiosulfonic acid S-(4-amino-2-tert-butyl-5-methyl-phenyl) ester (prepared in Example HHHH), 184 mg (1.32 mmol) of K2CO3 and 2 mL of DMF. The reaction was worked up by partitioning between EtOAc and H2O. The organic layer was separated and concentrated, then triturated with Et2O. The resultant solid was placed in chilled HCl-saturated CH2Cl2 and stirred for 18 hours. After concentration, the residue was triturated with Et2O to yield the title compound, m.p. 140°-145° C. 1H NMR (DMSO-d6) δ 1.5 (s, 9 H), 1.9 (s, 3 H), 2.05 (m, 4 H), 2.5 (m, 6 H), 6.68 (d, 4 H), 6.75 (s, 1 H), 7.0 (d, 4 H), 7.35 (s, 1 H), 7.95 (s, 2 H), 9.25 (s, 2 H).

Provenance & Evidence