Dimethylformamide → 3-[2-tert-Butyl-4-(2-hydroxy-ethoxy)-5-methyl-phenylsulfanyl]-4-hydroxy-6,6-bis-[2-(4-hydroxy-phenyl)-ethyl]-5,6-dihydro-pyran-2-one

Participants

Reaction Steps

The title compound was synthesized using General Method 9 using 0.07 g (2 mmol) of 4-hydroxy-6,6-bis-[2-(4-hydroxy-phenyl)-ethyl]-5,6-dihydro-pyran-2-one (prepared in Example PP), 1.00 g (2 mmol) of toluene-4-thiosulfonic acid S-{2-tert-butyl-4-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxy]-5-methyl-phenyl} ester (prepared in Example PPP), 1.06 g (8 mmol) K2CO3, and DMF (5 mL). The solid which was obtained was then dissolved in 20 mL MeOH and 2 mL of 1N HCl. After 15 minutes the reaction was concentrated and the residue partitioned between EtOAc and H2O; the organic layer was separated, dried (Na2SO4) and concentrated. Trituration with Et2O yielded the title compound, m.p. 106°-107° C. 1H NMR (DMSO-d6) δ 1.49 (s, 9 H), 1.75 (s, 3 H), 2.0 (t, 4 H), 2.5 (t, 4 H), 3.4 (dd, 2 H), 3.7 (bs, 2 H), 3.95 (t, 2 H), 4.8 (br s, 1 H), 6.66 (d, 4 H), 6.7 (s, 1 H), 6.8 (s, 1 H), 6.98 (d, 4 H), 9.17 (s, 2 H).

Provenance & Evidence