2,2-dimethyl-1-(2-sulfanylidene-1,3-thiazolidin-3-yl)propan-1-one

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

Procedure: To a suspension of Compound 141a (1.28 g, 3.88 mmol) in dry THF (50 mL) cooled in an ice-water bath was added NaH (60 percent, 163 mg, 4.08 mmol) followed by stirring for 10 minutes. A yellow-colored solution of Compound 226 (0.789 g, 3.88 mmol) in dry THF (10 mL) was added, and the mixture was then stirred at 25° C. for five minutes. The reaction mixture was quenched with water, extracted with ethyl acetate (50 mL), washed with brine, dried over anhydrous Na2SO4, and evaporated in vacuo to give a residue. Flash column chromatography of the residue (silica gel, 20 percent ethyl ether in benzene) provided Compound 142a (1.59 g, 99 percent): white powder; mp 125°-126.5° C.; Rf =0.49 (silica, 20 percent ethyl ether in benzene); IR (CHCl3) νmax 2957, 2934, 1750, 1261, 1131, 1116, 1027 cm-1 ; 1 H NMR (300 MHz, CDCl3) δ 8.58 (s, 1 H, H6), 7.98 (d, J=9.1 Hz, 1 H, H1), 7.67 (d, J=2.1 Hz, 1 H, H4), 7.21 (dd, J=9.1, 2.1 Hz, 1 H, H2), 5.33 (t, J=2.9 Hz, 1 H, H10), 2.90 (br dd, J=17.2, 3.3 Hz, 1 H, H7), 2.72 (ddd, J=17.2, 11.2, 5.7 Hz, 1 H, H7), 2.17-1.96 (m, 2 H, H8 or H9), 1.83-1.67 (m, 2 H, H8 or H9), 1.31 (s, 9 H, COC(CH3)3), 0.74 (s, 9 H, SiC(CH3)3), 0.12 (s, 6 H, Si(CH3)2); MS (FAB+) m/e (rel intensity) 414 (M+H, 100), 357 (9), 330 (12), 283 (5), 198 (10); HRMS for C24H36NO3Si (M+H), calcd 414.2464, found 414.2484. Anal. Calcd for C24H35NO3Si: C, 69.69; H, 8.53; N, 3.39. Found: C, 69.68; H, 8.44; N, 3.23. cooled in an ice-water bath the mixture was then stirred at 25° C. for five minutes The reaction mixture was quenched with water extracted with ethyl acetate (50 mL) washed with brine dried over anhydrous Na2SO4 evaporated in vacuo to give a residue

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

Procedure: To a suspension of Compound 141a (1.28 g, 3.88 mmol) in dry THF (50 mL) cooled in an ice-water bath was added NaH (60 percent, 163 mg, 4.08 mmol) followed by stirring for 10 minutes. A yellow-colored solution of Compound 226 (0.789 g, 3.88 mmol) in dry THF (10 mL) was added, and the mixture was then stirred at 25° C. for five minutes. The reaction mixture was quenched with water, extracted with ethyl acetate (50 mL), washed with brine, dried over anhydrous Na2SO4, and evaporated in vacuo to give a residue. Flash column chromatography of the residue (silica gel, 20 percent ethyl ether in benzene) provided Compound 142a (1.59 g, 99 percent): white powder; mp 125°-126.5° C.; Rf =0.49 (silica, 20 percent ethyl ether in benzene); IR (CHCl3) νmax 2957, 2934, 1750, 1261, 1131, 1116, 1027 cm-1 ; 1 H NMR (300 MHz, CDCl3) δ 8.58 (s, 1 H, H6), 7.98 (d, J=9.1 Hz, 1 H, H1), 7.67 (d, J=2.1 Hz, 1 H, H4), 7.21 (dd, J=9.1, 2.1 Hz, 1 H, H2), 5.33 (t, J=2.9 Hz, 1 H, H10), 2.90 (br dd, J=17.2, 3.3 Hz, 1 H, H7), 2.72 (ddd, J=17.2, 11.2, 5.7 Hz, 1 H, H7), 2.17-1.96 (m, 2 H, H8 or H9), 1.83-1.67 (m, 2 H, H8 or H9), 1.31 (s, 9 H, COC(CH3)3), 0.74 (s, 9 H, SiC(CH3)3), 0.12 (s, 6 H, Si(CH3)2); MS (FAB+) m/e (rel intensity) 414 (M+H, 100), 357 (9), 330 (12), 283 (5), 198 (10); HRMS for C24H36NO3Si (M+H), calcd 414.2464, found 414.2484. Anal. Calcd for C24H35NO3Si: C, 69.69; H, 8.53; N, 3.39. Found: C, 69.68; H, 8.44; N, 3.23. cooled in an ice-water bath the mixture was then stirred at 25° C. for five minutes The reaction mixture was quenched with water extracted with ethyl acetate (50 mL) washed with brine dried over anhydrous Na2SO4 evaporated in vacuo to give a residue

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of NaH (60 percent, 1.06 g, 26.5 mmol) in dry THF (10 mL) cooled at zero degrees C was added a solution of 2-mercaptothiazoline (3.0 g, 25.17 mmol) in dry THF (20 mL) followed by stirring at zero degrees C for 10 minutes. To the mixture was added trimethylacetyl chloride (3.1 mL, 25.17 mmol), the resultant mixture was then stirred at 25° C. for two hours. Water was added to the reaction mixture followed by extraction with ethyl acetate (100 mL), dry over anhydrous Na2SO4, and removal of the solvent in vacuo to give a crude product. Flash column chromatography of the crude product (silica gel, 17 percent ethyl ether in petroleum ether) afforded Compound 226 (4.68 g, 91 percent): pale-yellow solid; mp 48°-50° C.; Rf =0.19 (silica, 17 percent ethyl ether in petroleum ether); IR (CHCl3) νmax 2980, 1808, 1738, 1480, 1463, 1396, 1388, 1286, 1251, 1139, 1044, 1003, 874 cm-1 ; 1H NMR (300 MHz, CDCl3) δ 4.21 (t, J=7.3 Hz, 2 H, NCH2CH2S), 3.51 (t, J=7.3 Hz, 2 H, NCH2CH2S), 1.41 (s, 9 H, C(CH3)3); MS (FAB+) m/e (rel intensity) 204 (M+H, 100), 120 (27); HRMS for C8H14NOS2 (M+H), calcd 204.0517, found 204.0500. followed by extraction with ethyl acetate (100 mL) dry over anhydrous Na2SO4, and removal of the solvent in vacuo to give a crude product

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of NaH (60 percent, 1.06 g, 26.5 mmol) in dry THF (10 mL) cooled at zero degrees C was added a solution of 2-mercaptothiazoline (3.0 g, 25.17 mmol) in dry THF (20 mL) followed by stirring at zero degrees C for 10 minutes. To the mixture was added trimethylacetyl chloride (3.1 mL, 25.17 mmol), the resultant mixture was then stirred at 25° C. for two hours. Water was added to the reaction mixture followed by extraction with ethyl acetate (100 mL), dry over anhydrous Na2SO4, and removal of the solvent in vacuo to give a crude product. Flash column chromatography of the crude product (silica gel, 17 percent ethyl ether in petroleum ether) afforded Compound 226 (4.68 g, 91 percent): pale-yellow solid; mp 48°-50° C.; Rf =0.19 (silica, 17 percent ethyl ether in petroleum ether); IR (CHCl3) νmax 2980, 1808, 1738, 1480, 1463, 1396, 1388, 1286, 1251, 1139, 1044, 1003, 874 cm-1 ; 1H NMR (300 MHz, CDCl3) δ 4.21 (t, J=7.3 Hz, 2 H, NCH2CH2S), 3.51 (t, J=7.3 Hz, 2 H, NCH2CH2S), 1.41 (s, 9 H, C(CH3)3); MS (FAB+) m/e (rel intensity) 204 (M+H, 100), 120 (27); HRMS for C8H14NOS2 (M+H), calcd 204.0517, found 204.0500. followed by extraction with ethyl acetate (100 mL) dry over anhydrous Na2SO4, and removal of the solvent in vacuo to give a crude product

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

Procedure: To a suspension of Compound 141a (1.28 g, 3.88 mmol) in dry THF (50 mL) cooled in an ice-water bath was added NaH (60 percent, 163 mg, 4.08 mmol) followed by stirring for 10 minutes. A yellow-colored solution of Compound 226 (0.789 g, 3.88 mmol) in dry THF (10 mL) was added, and the mixture was then stirred at 25° C. for five minutes. The reaction mixture was quenched with water, extracted with ethyl acetate (50 mL), washed with brine, dried over anhydrous Na2SO4, and evaporated in vacuo to give a residue. Flash column chromatography of the residue (silica gel, 20 percent ethyl ether in benzene) provided Compound 142a (1.59 g, 99 percent): white powder; mp 125°-126.5° C.; Rf =0.49 (silica, 20 percent ethyl ether in benzene); IR (CHCl3) νmax 2957, 2934, 1750, 1261, 1131, 1116, 1027 cm-1 ; 1 H NMR (300 MHz, CDCl3) δ 8.58 (s, 1 H, H6), 7.98 (d, J=9.1 Hz, 1 H, H1), 7.67 (d, J=2.1 Hz, 1 H, H4), 7.21 (dd, J=9.1, 2.1 Hz, 1 H, H2), 5.33 (t, J=2.9 Hz, 1 H, H10), 2.90 (br dd, J=17.2, 3.3 Hz, 1 H, H7), 2.72 (ddd, J=17.2, 11.2, 5.7 Hz, 1 H, H7), 2.17-1.96 (m, 2 H, H8 or H9), 1.83-1.67 (m, 2 H, H8 or H9), 1.31 (s, 9 H, COC(CH3)3), 0.74 (s, 9 H, SiC(CH3)3), 0.12 (s, 6 H, Si(CH3)2); MS (FAB+) m/e (rel intensity) 414 (M+H, 100), 357 (9), 330 (12), 283 (5), 198 (10); HRMS for C24H36NO3Si (M+H), calcd 414.2464, found 414.2484. Anal. Calcd for C24H35NO3Si: C, 69.69; H, 8.53; N, 3.39. Found: C, 69.68; H, 8.44; N, 3.23. cooled in an ice-water bath the mixture was then stirred at 25° C. for five minutes The reaction mixture was quenched with water extracted with ethyl acetate (50 mL) washed with brine dried over anhydrous Na2SO4 evaporated in vacuo to give a residue

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of NaH (60 percent, 1.06 g, 26.5 mmol) in dry THF (10 mL) cooled at zero degrees C was added a solution of 2-mercaptothiazoline (3.0 g, 25.17 mmol) in dry THF (20 mL) followed by stirring at zero degrees C for 10 minutes. To the mixture was added trimethylacetyl chloride (3.1 mL, 25.17 mmol), the resultant mixture was then stirred at 25° C. for two hours. Water was added to the reaction mixture followed by extraction with ethyl acetate (100 mL), dry over anhydrous Na2SO4, and removal of the solvent in vacuo to give a crude product. Flash column chromatography of the crude product (silica gel, 17 percent ethyl ether in petroleum ether) afforded Compound 226 (4.68 g, 91 percent): pale-yellow solid; mp 48°-50° C.; Rf =0.19 (silica, 17 percent ethyl ether in petroleum ether); IR (CHCl3) νmax 2980, 1808, 1738, 1480, 1463, 1396, 1388, 1286, 1251, 1139, 1044, 1003, 874 cm-1 ; 1H NMR (300 MHz, CDCl3) δ 4.21 (t, J=7.3 Hz, 2 H, NCH2CH2S), 3.51 (t, J=7.3 Hz, 2 H, NCH2CH2S), 1.41 (s, 9 H, C(CH3)3); MS (FAB+) m/e (rel intensity) 204 (M+H, 100), 120 (27); HRMS for C8H14NOS2 (M+H), calcd 204.0517, found 204.0500. followed by extraction with ethyl acetate (100 mL) dry over anhydrous Na2SO4, and removal of the solvent in vacuo to give a crude product

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

Procedure: To a solution of 6-(2-ethylamino-4-methoxyphenyl)-5,6,7,8-tetrahydronaphthalen-2-ol (500 mg) in tetrahydrofuran (15 ml) was added 60% sodium hydride (75 mg) under a nitrogen atmosphere, the solution was stirred for 30 minutes at room temperature, then 2,2-dimethyl-1-(2-thioxothiazolidin-3-yl)propan-1-one (380 mg) was added thereto on an ice bath followed by stirring for 25 minutes. A saturated aqueous solution of ammonium chloride was added thererto, the solution was stirred, extracted with ethyl acetate, then sequentially washed with water and brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography (hexane-ethyl acetate system) to provide the title compound (640 mg). on an ice bath followed by stirring for 25 minutes the solution was stirred extracted with ethyl acetate sequentially washed with water and brine dried over anhydrous magnesium sulfate the solvent was evaporated in vacuo The residue was purified by silica gel column chromatography (hexane-ethyl acetate system)

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

Procedure: To a solution of 6-(2-ethylamino-4-methoxyphenyl)-5,6,7,8-tetrahydronaphthalen-2-ol (500 mg) in tetrahydrofuran (15 ml) was added 60% sodium hydride (75 mg) under a nitrogen atmosphere, the solution was stirred for 30 minutes at room temperature, then 2,2-dimethyl-1-(2-thioxothiazolidin-3-yl)propan-1-one (380 mg) was added thereto on an ice bath followed by stirring for 25 minutes. A saturated aqueous solution of ammonium chloride was added thererto, the solution was stirred, extracted with ethyl acetate, then sequentially washed with water and brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography (hexane-ethyl acetate system) to provide the title compound (640 mg). on an ice bath followed by stirring for 25 minutes the solution was stirred extracted with ethyl acetate sequentially washed with water and brine dried over anhydrous magnesium sulfate the solvent was evaporated in vacuo The residue was purified by silica gel column chromatography (hexane-ethyl acetate system)

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

Procedure: To a solution of 6-(2-ethylamino-4-methoxyphenyl)-5,6,7,8-tetrahydronaphthalen-2-ol (500 mg) in tetrahydrofuran (15 ml) was added 60% sodium hydride (75 mg) under a nitrogen atmosphere, the solution was stirred for 30 minutes at room temperature, then 2,2-dimethyl-1-(2-thioxothiazolidin-3-yl)propan-1-one (380 mg) was added thereto on an ice bath followed by stirring for 25 minutes. A saturated aqueous solution of ammonium chloride was added thereto, the solution was stirred, extracted with ethyl acetate, then sequentially washed with water and brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography (hexane-ethyl acetate system) to provide the title compound (640 mg). on an ice bath followed by stirring for 25 minutes the solution was stirred extracted with ethyl acetate sequentially washed with water and brine dried over anhydrous magnesium sulfate the solvent was evaporated in vacuo The residue was purified by silica gel column chromatography (hexane-ethyl acetate system)

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

Procedure: To a solution of 6-(2-ethylamino-4-methoxyphenyl)-5,6,7,8-tetrahydronaphthalen-2-ol (500 mg) in tetrahydrofuran (15 ml) was added 60% sodium hydride (75 mg) under a nitrogen atmosphere, the solution was stirred for 30 minutes at room temperature, then 2,2-dimethyl-1-(2-thioxothiazolidin-3-yl)propan-1-one (380 mg) was added thereto on an ice bath followed by stirring for 25 minutes. A saturated aqueous solution of ammonium chloride was added thereto, the solution was stirred, extracted with ethyl acetate, then sequentially washed with water and brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. The residue was purified by silica gel column chromatography (hexane-ethyl acetate system) to provide the title compound (640 mg). on an ice bath followed by stirring for 25 minutes the solution was stirred extracted with ethyl acetate sequentially washed with water and brine dried over anhydrous magnesium sulfate the solvent was evaporated in vacuo The residue was purified by silica gel column chromatography (hexane-ethyl acetate system)

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

Procedure: To a suspension of Compound 141a (1.28 g, 3.88 mmol) in dry THF (50 mL) cooled in an ice-water bath was added NaH (60 percent, 163 mg, 4.08 mmol) followed by stirring for 10 minutes. A yellow-colored solution of Compound 226 (0.789 g, 3.88 mmol) in dry THF (10 mL) was added, and the mixture was then stirred at 25° C. for five minutes. The reaction mixture was quenched with water, extracted with ethyl acetate (50 mL), washed with brine, dried over anhydrous Na2SO4, and evaporated in vacuo to give a residue. Flash column chromatography of the residue (silica gel, 20 percent ethyl ether in benzene) provided Compound 142a (1.59 g, 99 percent): white powder; mp 125°-126.5° C.; Rf =0.49 (silica, 20 percent ethyl ether in benzene); IR (CHCl3) νmax 2957, 2934, 1750, 1261, 1131, 1116, 1027 cm-1 ; 1 H NMR (300 MHz, CDCl3) δ 8.58 (s, 1 H, H6), 7.98 (d, J=9.1 Hz, 1 H, H1), 7.67 (d, J=2.1 Hz, 1 H, H4), 7.21 (dd, J=9.1, 2.1 Hz, 1 H, H2), 5.33 (t, J=2.9 Hz, 1 H, H10), 2.90 (br dd, J=17.2, 3.3 Hz, 1 H, H7), 2.72 (ddd, J=17.2, 11.2, 5.7 Hz, I H, H7), 2.17-1.96 (m, 2 H, H8 or H9), 1.83-1.67 (m, 2 H, H8 or H9), 1.31 (s, 9 H, COC(CH3)3), 0.74 (s, 9 H, SiC(CH3)3), 0.12 (s, 6 H, Si(CH3)2); MS (FAB+) m/e (rel intensity) 414 (M+H, 100), 357 (9), 330 (12), 283 (5), 198 (10); HRMS for C24H36NO3Si (M+H), calcd 414.2464, found 414.2484. Anal. Calcd for C24H35NO3Si: C, 69.69; H, 8.53; N, 3.39. Found: C, 69.68; H, 8.44; N, 3.23. cooled in an ice-water bath the mixture was then stirred at 25° C. for five minutes The reaction mixture was quenched with water extracted with ethyl acetate (50 mL) washed with brine dried over anhydrous Na2SO4 evaporated in vacuo to give a residue

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of NaH (60 percent, 1.06 g, 26.5 mmol) in dry THF (10 mL) cooled at zero degrees C. was added a solution of 2-mercaptothiazoline (3.0 g, 25.17 mmol) in dry THF (20 mL) followed by stirring at zero degrees C. for 10 minutes. To the mixture was added trimethylacetyl chloride (3.1 mL, 25.17 mmol), the resultant mixture was then sirrted at 25° C. for two hours. Water was added to the reaction mixture followed by extraction with ethyl acetate (100 mL), dry over anhydrous Na2SO4 l and removal of the solvent in vacuo to give a crude product. Flash column chromatography of the crude product (silica gel, 17 percent ethyl ether in petroleum ether) afforded Compound 226 (4.68 g, 91 percent): pale-yellow solid; mp 48°-50° C.; Rf =0.19 (silica, 17 percent ethyl ether in petroleum ether); IR (CHCl3) νmax 2980, 1808, 1738, 1480, 1463, 1396, 1388, 1286, 1251, 1139, 1044, 1003, 874 cm-1 ; 1H NMR (300 MHz, CDCl3) δ 4.21 (t, J=7.3 Hz, 2 H, NCH2CH2S), 3.51 (t, J =7.3 Hz, 2 H, NCH2CH2S), 1. 4 1 (s, 9 H, C(CH3)3); MS (FAB+) m/e (rel intensity) 204 (M+H, 100), 120 (27); HRMS for C8H14NOS2 (M+H), calcd 204.0517, found 204.0500. followed by extraction with ethyl acetate (100 mL) dry over anhydrous Na2SO4 l and removal of the solvent in vacuo to give a crude product