Acetic acid 2-acetoxy-5-[3-cyclopentyl-4-(2,2-dimethyl-6-oxo-6H-[1,3]dioxin-4-yl)-3-hydroxy-but-1-ynyl]-benzyl ester → 6-Cyclopentyl-6-[2-(4-hydroxy-3-hydroxymethyl-phenyl)-ethyl]-dihydro-pyran-2,4-dione

Participants

Reaction Steps

The title compound was prepared analogously to step 4 from Example A(97) where Acetic acid 2-acetoxy-5-[3-cyclopentyl-4-(2,2-dimethyl-6-oxo-6H-[1,3]dioxin-4-yl) -3-hydroxy-but-1-ynyl]-benzyl ester (from step 2 below) was substituted in place of 2-{4-[3-cyclopentyl-4-(2,2-dimethyl-4-oxo-4H-1,3-dioxin-6-yl)-3-hydroxybut-1-ynyl]-2-fluorophenyl}-2-methylpropanenitrile. The product was obtained together with compound from Example A(194). 6-Cyclopentyl-6-[2-(4-hydroxy-3-methoxymethyl-phenyl)-ethyl]-dihydro-pyran-2,4-dione above 1H NMR (400 MHz, CDCl3): δ 1.30–1.80 (m, 9H), 1.83–1.86 (m, 2H), 2.15–2.18 (m, 1H), 2.49–2.54 (m, 2H), 2.67 (s, 2H), 3.33 (s, 2H), 4.76 (s, 2H), 6.71–6.91 (m, 3H). ESIMS (MH−): 331.

Provenance & Evidence