ethyl 3-sulfanylbenzoate

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (66 mg, 0.36 mmol) in CH2Cl2 (5 mL) under inert atmosphere was added NCS (48.2 mg, 0.36 mmol) at RT and stirred for 50 min. To this, compound 3 (100 mg, 0.36 mmol) was added at RT and stirred for 16 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (25 mL) and extracted with CH2Cl2 (2×20 mL). The combined organic extracts were washed with brine (20 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by silica gel column chromatography using 9% EtOAc/Hexanes to afford compound 4 (100 mg, 61%) as a colorless syrup. 1H NMR (500 MHz, CDCl3): δ 7.88 (s, 1H), 7.77-7.76 (m, 1H), 7.69 (s, 1H), 7.67 (s, 1H), 7.43 (s, 1H), 7.27-7.24 (m, 3H), 7.15-7.12 (m, 1H), 4.33 (q, J=7.5 Hz, 2H), 4.15 (t, J=7.0 Hz, 2H), 1.98-1.94 (m, 2H), 1.35 (t, J=7.5 Hz, 3H), 0.98 (t, J=7.0 Hz, 3H); LC-MS: 94.6%; m/z 458.4 (M+H+); (column: X Select CSH C-18, 50×3.0 mm, 3.5 μm); RT 4.91 min; 5 mM NH4OAc: ACN; 0.8 mL/min). stirred for 16 h after completion of the reaction extracted with CH2Cl2 (2×20 mL) The combined organic extracts were washed with brine (20 mL) dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by silica gel column chromatography

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (372 mg, 2.03 mmol) in CH2Cl2 (20 mL) under inert atmosphere was added NCS (271 mg, 2.03 mmol) at 0° C.; warmed to RT and stirred for 45 min. To this, compound 2 (500 mg, 1.93 mmol) was added at 0° C.; warmed to RT and stirred for 12 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (40 mL) and extracted with CH2Cl2 (3×20 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by silica gel column chromatography using 10-15% EtOAc/Hexanes to afford compound 3 (700 mg, 83%) as a yellow oil. 1H NMR (400 MHz, CDCl3): δ 7.89 (s, 1H), 7.76-7.74 (m, 1H), 7.72 (s, 1H), 7.68 (s, 1H), 7.49-7.47 (m, 2H), 7.40 (s, 1H), 7.24-7.23 (m, 2H), 7.15 (d, J=8.4 Hz, 1H), 4.32 (q, J=7.2 Hz, 2H), 4.18 (t, J=7.2 Hz, 2H), 2.01-1.96 (m, 2H), 1.34 (t, J=7.2 Hz, 3H), 1.00 (t, J=7.2 Hz, 3H); LC-MS (ESI): 72.2%; m/z 440.4 (M+H+); (column: X Select CSH C-18, 50×3.0 mm, 3.5 μm); RT 4.87 min; 5 mM NH4OAc: ACN; 0.8 mL/min). warmed to RT stirred for 12 h after completion of the reaction extracted with CH2Cl2 (3×20 mL) The combined organic extracts were dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by silica gel column chromatography

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (372 mg, 2.03 mmol) in CH2Cl2 (20 mL) under inert atmosphere was added NCS (271 mg, 2.03 mmol) at 0° C.; warmed to RT and stirred for 45 min. To this, compound 2 (500 mg, 1.93 mmol) was added at 0° C.; warmed to RT and stirred for 12 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (40 mL) and extracted with CH2Cl2 (3×20 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by silica gel column chromatography using 10-15% EtOAc/Hexanes to afford compound 3 (700 mg, 83%) as a yellow oil. 1H NMR (400 MHz, CDCl3): δ 7.89 (s, 1H), 7.76-7.74 (m, 1H), 7.72 (s, 1H), 7.68 (s, 1H), 7.49-7.47 (m, 2H), 7.40 (s, 1H), 7.24-7.23 (m, 2H), 7.15 (d, J=8.4 Hz, 1H), 4.32 (q, J=7.2 Hz, 2H), 4.18 (t, J=7.2 Hz, 2H), 2.01-1.96 (m, 2H), 1.34 (t, J=7.2 Hz, 3H), 1.00 (t, J=7.2 Hz, 3H); LC-MS (ESI): 72.2%; m/z 440.4 (M+H+); (column: X Select CSH C-18, 50×3.0 mm, 3.5 μm); RT 4.87 min; 5 mM NH4OAc: ACN; 0.8 mL/min). warmed to RT stirred for 12 h after completion of the reaction extracted with CH2Cl2 (3×20 mL) The combined organic extracts were dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by silica gel column chromatography

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (124.9 mg, 0.68 mmol) in CH2Cl2 (20 mL) under inert atmosphere was added NCS (109 mg, 0.81 mmol) at 0° C.; warmed to RT and stirred for 1 h. To this, compound 3 (200 mg, 0.68 mmol) was added at 0° C.; warmed to RT and stirred for 12 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (25 mL) and extracted with CH2Cl2 (3×25 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by preparative HPLC to afford compound 4 (15 mg, 5%) as colorless oil. 1H NMR (500 MHz, CDCl3): δ 7.90 (s, 1H), 7.79-7.77 (m, 1H), 7.69 (s, 1H), 7.66 (s, 1H), 7.48 (d, J=9.0 Hz, 1H), 7.26-7.22 (m, 3H), 7.16 (d, J=9.0 Hz, 1H), 4.32 (q, J=7.5 Hz, 2H), 4.20 (t, J=7.0 Hz, 2H), 2.02-1.98 (m, 2H), 1.37-1.34 (t, J=7.5 Hz, 3H), 1.01 (t, J=7.0 Hz, 3H); LC-MS (ESI): 92.7%; m/z 475.8 (M+H+); (column: X Select C-18, 50×3.0 mm, 3.5 μm); RT 5.03 min; 5 mM NH4OAc: ACN; 0.8 mL/min). warmed to RT stirred for 12 h after completion of the reaction extracted with CH2Cl2 (3×25 mL) The combined organic extracts were dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by preparative HPLC

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (66 mg, 0.36 mmol) in CH2Cl2 (5 mL) under inert atmosphere was added NCS (48.2 mg, 0.36 mmol) at RT and stirred for 50 min. To this, compound 3 (100 mg, 0.36 mmol) was added at RT and stirred for 16 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (25 mL) and extracted with CH2Cl2 (2×20 mL). The combined organic extracts were washed with brine (20 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by silica gel column chromatography using 9% EtOAc/Hexanes to afford compound 4 (100 mg, 61%) as a colorless syrup. 1H NMR (500 MHz, CDCl3): δ 7.88 (s, 1H), 7.77-7.76 (m, 1H), 7.69 (s, 1H), 7.67 (s, 1H), 7.43 (s, 1H), 7.27-7.24 (m, 3H), 7.15-7.12 (m, 1H), 4.33 (q, J=7.5 Hz, 2H), 4.15 (t, J=7.0 Hz, 2H), 1.98-1.94 (m, 2H), 1.35 (t, J=7.5 Hz, 3H), 0.98 (t, J=7.0 Hz, 3H); LC-MS: 94.6%; m/z 458.4 (M+H+); (column: X Select CSH C-18, 50×3.0 mm, 3.5 μm); RT 4.91 min; 5 mM NH4OAc: ACN; 0.8 mL/min). stirred for 16 h after completion of the reaction extracted with CH2Cl2 (2×20 mL) The combined organic extracts were washed with brine (20 mL) dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by silica gel column chromatography

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (372 mg, 2.03 mmol) in CH2Cl2 (20 mL) under inert atmosphere was added NCS (271 mg, 2.03 mmol) at 0° C.; warmed to RT and stirred for 45 min. To this, compound 2 (500 mg, 1.93 mmol) was added at 0° C.; warmed to RT and stirred for 12 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (40 mL) and extracted with CH2Cl2 (3×20 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by silica gel column chromatography using 10-15% EtOAc/Hexanes to afford compound 3 (700 mg, 83%) as a yellow oil. 1H NMR (400 MHz, CDCl3): δ 7.89 (s, 1H), 7.76-7.74 (m, 1H), 7.72 (s, 1H), 7.68 (s, 1H), 7.49-7.47 (m, 2H), 7.40 (s, 1H), 7.24-7.23 (m, 2H), 7.15 (d, J=8.4 Hz, 1H), 4.32 (q, J=7.2 Hz, 2H), 4.18 (t, J=7.2 Hz, 2H), 2.01-1.96 (m, 2H), 1.34 (t, J=7.2 Hz, 3H), 1.00 (t, J=7.2 Hz, 3H); LC-MS (ESI): 72.2%; m/z 440.4 (M+H+); (column: X Select CSH C-18, 50×3.0 mm, 3.5 μm); RT 4.87 min; 5 mM NH4OAc: ACN; 0.8 mL/min). warmed to RT stirred for 12 h after completion of the reaction extracted with CH2Cl2 (3×20 mL) The combined organic extracts were dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by silica gel column chromatography

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

Procedure: To a stirred solution of ethyl 3-mercaptobenzoate (124.9 mg, 0.68 mmol) in CH2Cl2 (20 mL) under inert atmosphere was added NCS (109 mg, 0.81 mmol) at 0° C.; warmed to RT and stirred for 1 h. To this, compound 3 (200 mg, 0.68 mmol) was added at 0° C.; warmed to RT and stirred for 12 h. The reaction was monitored by TLC; after completion of the reaction, the reaction mixture was diluted with water (25 mL) and extracted with CH2Cl2 (3×25 mL). The combined organic extracts were dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. This was purified by preparative HPLC to afford compound 4 (15 mg, 5%) as colorless oil. 1H NMR (500 MHz, CDCl3): δ 7.90 (s, 1H), 7.79-7.77 (m, 1H), 7.69 (s, 1H), 7.66 (s, 1H), 7.48 (d, J=9.0 Hz, 1H), 7.26-7.22 (m, 3H), 7.16 (d, J=9.0 Hz, 1H), 4.32 (q, J=7.5 Hz, 2H), 4.20 (t, J=7.0 Hz, 2H), 2.02-1.98 (m, 2H), 1.37-1.34 (t, J=7.5 Hz, 3H), 1.01 (t, J=7.0 Hz, 3H); LC-MS (ESI): 92.7%; m/z 475.8 (M+H+); (column: X Select C-18, 50×3.0 mm, 3.5 μm); RT 5.03 min; 5 mM NH4OAc: ACN; 0.8 mL/min). warmed to RT stirred for 12 h after completion of the reaction extracted with CH2Cl2 (3×25 mL) The combined organic extracts were dried over Na2SO4 filtered concentrated under reduced pressure to obtain the crude This was purified by preparative HPLC