反应详情

A solution of 1-hydroxycyclopentanecarboxylic acid (1.4 g, 10.76 mmol) in MeOH (10 mL) was treated with cone. H2SO4 (1 drop), heated at 65° C. for 2 h, cooled to RT and concentrated to dryness. The residue was treated with satd. NaHCO3, extracted with DCM (3×) and the combined organics were washed with brine, dried over Na2SO4 and concentrated to dryness to afford methyl 1-hydroxycyclopentanecarboxylate (1.45 g, 92%). 1H NMR (400 MHz, CDCl3): δ 3.79 (s, 3H), 2.92 (br s, 1H), 2.11-2.00 (m, 2H), 1.91-1.83 (m, 2H), 1.82-1.72 (m, 4H).

1. concentrationconcentrated to dryness
2. additionThe residue was treated with satd
3. extractionNaHCO3, extracted with DCM (3×)
4. washthe combined organics were washed with brine
5. dry with materialdried over Na2SO4
6. concentrationconcentrated to dryness