Ethyl Thioglycolate → HCID 57890097, compound

Participants

Reaction Steps

To a solution of 2.68 M sodium ethoxide (507 μl, 1.36 mmol) in EtOH (2 ml) is added ethyl 2-mercaptoacetate (149 μl, 1.36 mmol) and stirred at RT for 30 m. The mixture is added a solution of toluene-4-sulfonic acid 5-{1-[4-(tert-butyl-dimethyl-silanyloxy)-3-methyl-phenyl]-1-ethyl-propyl}-3-methyl-thiophen-2-ylmethyl ester (740 mg, 1.29 mmol) in EtOH (2 ml) is added and refluxed for 15 m. The reaction is concentrated and partitioned between EtOAc (100 ml) and 0.2N HCl (50 ml). The organic layer is washed with water (50 ml), dried (MgSO4), concentrated, and chromatographed (12 g SiO2, 5% EtOAc/Hex) to yield the title compound (180 mg, 27%). 1NMR (400 MHz, CDCl3) δ 7.00 (d, 1H, J=2.2 Hz), 6.92 (dd, 1H, J=8.4, 2.2 Hz), 6.64 (d, 1H, J=8.4 Hz), 6.46 (s, 1H), 4.17 (q, 2H, J=7.2 Hz), 3.92 (s, 2H), 3.14 (s, 2H), 2.16 (s, 3H), 2.12 (s, 3H), 2.07-1.98 (m, 4H), 1.28 (t, 3H, J=7.0 Hz), 1.00 (s, 9H), 0.68 (t, 6H, J=7.3 Hz), 0.20 (s, 6H).

Provenance & Evidence