ethyl 2-phenyl-1H-pyrrole-3-carboxylate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Phenyl-1-(toluene-4-sulfonyl)-2,5-dihydro-1H-pyrrole-3-carboxylic acid ethyl ester (0.42 g, 1.13 mmol) (prepared according to the method disclosed in reference 1) and 1.0 M potassium tert-butoxide in THF (1.42 mL, 1.42 mmol) were stirred in THF at 0° C. for 30 min, then warmed to rt for 30 min. The reaction was diluted with diethyl ether, washed 1× with satd. NH4Cl, dried over MgSO4, filtered, and concentrated. Silica gel chromatography using hexanes/ethyl acetate (9:1) gave 0.195 g of title compound. (80% yield). 1H NMR (CDCl13) δ 9.14 (bs, 1H), 7.50-7.46 (m, 2H), 7.32-7.27 (m, 3H), 6.68-6.66 (t, J=2.90 Hz, 1H), 6.56-6.55 (t, J=2.90 Hz, 1H), 4.12-4.06 (q, J=7.25 Hz, 2H), 1.20-1.16 (t, J=7.25 Hz, 3H). 13C NMR (CDCl3) δ 165.8, 137.4, 132.4, 129.3, 128.8, 128.3, 128.2, 118.3, 112.1, 60.0, 14.4; MS APCI: [M+H]+=216.1. washed 1× with satd NH4Cl, dried over MgSO4 filtered concentrated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Phenyl-1-(toluene-4-sulfonyl)-2,5-dihydro-1H-pyrrole-3-carboxylic acid ethyl ester (0.42 g, 1.13 mmol) (prepared according to the method disclosed in reference 1) and 1.0 M potassium tert-butoxide in THF (1.42 mL, 1.42 mmol) were stirred in THF at 0° C. for 30 min, then warmed to rt for 30 min. The reaction was diluted with diethyl ether, washed 1× with satd. NH4Cl, dried over MgSO4, filtered, and concentrated. Silica gel chromatography using hexanes/ethyl acetate (9:1) gave 0.195 g of title compound. (80% yield). 1H NMR (CDCl13) δ 9.14 (bs, 1H), 7.50-7.46 (m, 2H), 7.32-7.27 (m, 3H), 6.68-6.66 (t, J=2.90 Hz, 1H), 6.56-6.55 (t, J=2.90 Hz, 1H), 4.12-4.06 (q, J=7.25 Hz, 2H), 1.20-1.16 (t, J=7.25 Hz, 3H). 13C NMR (CDCl3) δ 165.8, 137.4, 132.4, 129.3, 128.8, 128.3, 128.2, 118.3, 112.1, 60.0, 14.4; MS APCI: [M+H]+=216.1. washed 1× with satd NH4Cl, dried over MgSO4 filtered concentrated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Phenyl-1-(toluene-4-sulfonyl)-2,5-dihydro-1H-pyrrole-3-carboxylic acid ethyl ester (0.42 g, 1.13 mmol) (prepared according to the method disclosed in reference 1) and 1.0 M potassium tert-butoxide in THF (1.42 mL, 1.42 mmol) were stirred in THF at 0° C. for 30 min, then warmed to rt for 30 min. The reaction was diluted with diethyl ether, washed 1× with satd. NH4Cl, dried over MgSO4, filtered, and concentrated. Silica gel chromatography using hexanes/ethyl acetate (9:1) gave 0.195 g of title compound. (80% yield). 1H NMR (CDCl13) δ 9.14 (bs, 1H), 7.50-7.46 (m, 2H), 7.32-7.27 (m, 3H), 6.68-6.66 (t, J=2.90 Hz, 1H), 6.56-6.55 (t, J=2.90 Hz, 1H), 4.12-4.06 (q, J=7.25 Hz, 2H), 1.20-1.16 (t, J=7.25 Hz, 3H). 13C NMR (CDCl3) δ 165.8, 137.4, 132.4, 129.3, 128.8, 128.3, 128.2, 118.3, 112.1, 60.0, 14.4; MS APCI: [M+H]+=216.1. washed 1× with satd NH4Cl, dried over MgSO4 filtered concentrated