8-bromo-3,4-dihydro-2H-naphthalen-1-one

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 57.1 g (533 mmol) of 2-methylaniline in 300 ml of toluene 25.3 g (133 mmol) of TiCl4 was added dropwise for 30 min at room temperature in argon atmosphere. The resulting mixture was stirred for 30 min at 90° C. followed by an addition of 30.0 g (133.0 mmol) 8-bromo-3,4-dihydronaphthalen-1(2H)-one. This mixture was stirred for 10 min at 90° C., poured into 500 ml of water, and the product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 50 ml of ethyl acetate. The obtained solid was dissolved in 600 ml of methanol, 15.4 g (244 mmol) of NaBH3CN and 5 ml of acetic acid were added in argon atmosphere. The resulting mixture was refluxed for 3 h, then cooled to room temperature, and evaporated to dryness. The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 400 ml of methanol. Yield 33.2 g (79%) of a yellow crystalline powder. Anal. Calc. for C17H18BrN: C, 64.57; H, 5.74; N, 4.43. Found: C, 64.69; H, 5.82; N, 4.55. 1H NMR (CDCl3): δ 7.45 (m, 1H, 7-H in tetrahydronaphtalene); 7.19 (m, 1H, 6-H in tetrahydronaphtalene); 7.08-7.14 (m, 3H, 5-H in tetrahydronaphtalene and 3,5-H in 2-methylphenyl); 6.86 (m, 1H, 6-H in 2-methylphenyl); 6.68 (m, 1H, 4-H in 2-methylphenyl); 4.78 (m, 1H, 4-H in 2-methylphenyl); 3.51 (br.s, 1H, NH); 2.86-2.92 (m, 1H, 4- or 4′-H in tetrahydronaphtalene); 2.72-2.81 (m, 1H, 4′- or 4-H in tetrahydronaphtalene); 2.30-2.34 (m, 1H, 3- or 3′-H in tetrahydronaphtalene); 2.06 (s, 3H, CH3 in 2-methylphenyl); 1.85-1.97 (m, 1H, 3′- or 3-H in tetrahydronaphtalene); 1.77-1.81 (m, 1H, 2- or 2′-H in tetrahydronaphtalene); 1.59-1.67 (m, 1H, 2′- or 2-H in tetrahydronaphtalene). This mixture was stirred for 10 min at 90° C. the product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 50 ml of ethyl acetate The obtained solid was dissolved in 600 ml of methanol The resulting mixture was refluxed for 3 h cooled to room temperature evaporated to dryness The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 400 ml of methanol

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 57.1 g (533 mmol) of 2-methylaniline in 300 ml of toluene 25.3 g (133 mmol) of TiCl4 was added dropwise for 30 min at room temperature in argon atmosphere. The resulting mixture was stirred for 30 min at 90° C. followed by an addition of 30.0 g (133.0 mmol) 8-bromo-3,4-dihydronaphthalen-1(2H)-one. This mixture was stirred for 10 min at 90° C., poured into 500 ml of water, and the product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 50 ml of ethyl acetate. The obtained solid was dissolved in 600 ml of methanol, 15.4 g (244 mmol) of NaBH3CN and 5 ml of acetic acid were added in argon atmosphere. The resulting mixture was refluxed for 3 h, then cooled to room temperature, and evaporated to dryness. The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 400 ml of methanol. Yield 33.2 g (79%) of a yellow crystalline powder. Anal. Calc. for C17H18BrN: C, 64.57; H, 5.74; N, 4.43. Found: C, 64.69; H, 5.82; N, 4.55. 1H NMR (CDCl3): δ 7.45 (m, 1H, 7-H in tetrahydronaphtalene); 7.19 (m, 1H, 6-H in tetrahydronaphtalene); 7.08-7.14 (m, 3H, 5-H in tetrahydronaphtalene and 3,5-H in 2-methylphenyl); 6.86 (m, 1H, 6-H in 2-methylphenyl); 6.68 (m, 1H, 4-H in 2-methylphenyl); 4.78 (m, 1H, 4-H in 2-methylphenyl); 3.51 (br.s, 1H, NH); 2.86-2.92 (m, 1H, 4- or 4′-H in tetrahydronaphtalene); 2.72-2.81 (m, 1H, 4′- or 4-H in tetrahydronaphtalene); 2.30-2.34 (m, 1H, 3- or 3′-H in tetrahydronaphtalene); 2.06 (s, 3H, CH3 in 2-methylphenyl); 1.85-1.97 (m, 1H, 3′- or 3-H in tetrahydronaphtalene); 1.77-1.81 (m, 1H, 2- or 2′-H in tetrahydronaphtalene); 1.59-1.67 (m, 1H, 2′- or 2-H in tetrahydronaphtalene). This mixture was stirred for 10 min at 90° C. the product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 50 ml of ethyl acetate The obtained solid was dissolved in 600 ml of methanol The resulting mixture was refluxed for 3 h cooled to room temperature evaporated to dryness The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 400 ml of methanol

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

Procedure: To a solution of 56.0 g (250 mmol) of 8-bromo-1,2,3,4-tetrahydronaphthalen-1-ol in 3500 ml of dichloromethane 265 g (1.23 mol) of PCC was added. The resulting mixture was stirred at room temperature for 5 h, then passed through a silica gel pad (500 ml), and evaporated to dryness. Yield 47.6 g (88%) of a colorless solid. Anal. Calc for C10H9BrO: C, 53.36; H, 4.03. Found: C, 53.44; H, 4.19. 1H NMR (CDCl3): δ 7.53 (m, 1H, 7-H); 7.18-7.22 (m, 2H, 5,6-H); 2.95 (t, J=6.1 Hz, 2H, 4,4′-H); 2.67 (t, J=6.6 Hz, 2H, 2,2′-H); 2.08 (qv, J=6.1 Hz, J=6.6 Hz, 2H, 3,3′-H). evaporated to dryness

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 57.1 g (533 mmol) of 2-methylaniline in 300 ml of toluene 25.3 g (133 mmol) of TiCl4 was added dropwise for 30 min at room temperature in argon atmosphere. The resulting mixture was stirred for 30 min at 90° C. followed by an addition of 30.0 g (133.0 mmol) 8-bromo-3,4-dihydronaphthalen-1(2H)-one. This mixture was stirred for 10 min at 90° C., poured into 500 ml of water, and the product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 50 ml of ethyl acetate. The obtained solid was dissolved in 600 ml of methanol, 15.4 g (244 mmol) of NaBH3CN and 5 ml of acetic acid were added in argon atmosphere. The resulting mixture was refluxed for 3 h, then cooled to room temperature, and evaporated to dryness. The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 400 ml of methanol. Yield 33.2 g (79%) of a yellow crystalline powder. Anal. Calc. for C17H18BrN: C, 64.57; H, 5.74; N, 4.43. Found: C, 64.69; H, 5.82; N, 4.55. 1H NMR (CDCl3): δ 7.45 (m, 1H, 7-H in tetrahydronaphtalene); 7.19 (m, 1H, 6-H in tetrahydronaphtalene); 7.08-7.14 (m, 3H, 5-H in tetrahydronaphtalene and 3,5-H in 2-methylphenyl); 6.86 (m, 1H, 6-H in 2-methylphenyl); 6.68 (m, 1H, 4-H in 2-methylphenyl); 4.78 (m, 1H, 4-H in 2-methylphenyl); 3.51 (br.s, 1H, NH); 2.86-2.92 (m, 1H, 4- or 4′-H in tetrahydronaphtalene); 2.72-2.81 (m, 1H, 4′- or 4-H in tetrahydronaphtalene); 2.30-2.34 (m, 1H, 3- or 3′-H in tetrahydronaphtalene); 2.06 (s, 3H, CH3 in 2-methylphenyl); 1.85-1.97 (m, 1H, 3′- or 3-H in tetrahydronaphtalene); 1.77-1.81 (m, 1H, 2- or 2′-H in tetrahydronaphtalene); 1.59-1.67 (m, 1H, 2′- or 2-H in tetrahydronaphtalene). This mixture was stirred for 10 min at 90° C. the product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 50 ml of ethyl acetate The obtained solid was dissolved in 600 ml of methanol The resulting mixture was refluxed for 3 h cooled to room temperature evaporated to dryness The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 400 ml of methanol

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

Procedure: To a solution of 56.0 g (250 mmol) of 8-bromo-1,2,3,4-tetrahydronaphthalen-1-ol in 3500 ml of dichloromethane 265 g (1.23 mol) of PCC was added. The resulting mixture was stirred at room temperature for 5 h, then passed through a silica gel pad (500 ml), and evaporated to dryness. Yield 47.6 g (88%) of a colorless solid. Anal. Calc for C10H9BrO: C, 53.36; H, 4.03. Found: C, 53.44; H, 4.19. 1H NMR (CDCl3): δ 7.53 (m, 1H, 7-H); 7.18-7.22 (m, 2H, 5,6-H); 2.95 (t, J=6.1 Hz, 2H, 4,4′-H); 2.67 (t, J=6.6 Hz, 2H, 2,2′-H); 2.08 (qv, J=6.1 Hz, J=6.6 Hz, 2H, 3,3′-H). evaporated to dryness

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

Procedure: To a solution of 56.0 g (250 mmol) of 8-bromo-1,2,3,4-tetrahydronaphthalen-1-ol in 3500 ml of dichloromethane 265 g (1.23 mol) of PCC was added. The resulting mixture was stirred at room temperature for 5 h, then passed through a silica gel pad (500 ml), and evaporated to dryness. Yield 47.6 g (88%) of a colorless solid. Anal. Calc for C10H9BrO: C, 53.36; H, 4.03. Found: C, 53.44; H, 4.19. 1H NMR (CDCl3): δ 7.53 (m, 1H, 7-H); 7.18-7.22 (m, 2H, 5,6-H); 2.95 (t, J=6.1 Hz, 2H, 4,4′-H); 2.67 (t, J=6.6 Hz, 2H, 2,2′-H); 2.08 (qv, J=6.1 Hz, J=6.6 Hz, 2H, 3,3′-H). evaporated to dryness

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

Procedure: 33 ml of 2M lithiumdiisopropylamide were added to a solution of 13.5 g (60 mmol) of 8-bromotetralone in 470 ml of THF at −30° C. under a protective gas atmopshere and, after stirring, a solution of 11 g (72.mmol) of methylbromoacetate in 100 ml of THF was added dropwise. The mixture was worked up after 18 h at room temperature by adding 10 ml of concentrated hydrochloric acid at 0° C. The solvent was removed in vacuo, and the residue was taken up in water and extracted with ethyl acetate. The combined organic phases were dried over sodium sulfate, filtered and concentrated; the residue was purified by column chromatography (silica gel, mobile phase: methylene chloride). The solvent was removed in vacuo extracted with ethyl acetate The combined organic phases were dried over sodium sulfate filtered concentrated the residue was purified by column chromatography (silica gel, mobile phase: methylene chloride)

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 57.1 g (533 mmol) of 2-methylaniline in 300 ml of toluene 25.3 g (133 mmol) of TiCl4 was added dropwise for 30 min at room temperature in argon atmosphere. The resulting mixture was stirred for 30 min at 90° C. followed by an addition of 30.0 g (133.0 mmol) 8-bromo-3,4-dihydronaphthalen-1(2H)-one. This mixture was stirred for 10 min at 90° C., poured into 500 ml of water, and the product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 50 ml of ethyl acetate. The obtained solid was dissolved in 600 ml of methanol, 15.4 g (244 mmol) of NaBH3CN and 5 ml of acetic acid were added in argon atmosphere. The resulting mixture was refluxed for 3 h, then cooled to room temperature, and evaporated to dryness. The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 400 ml of methanol. Yield 33.2 g (79%) of a yellow crystalline powder. Anal. Calc. for C17H18BrN: C, 64.57; H, 5.74; N, 4.43. Found: C, 64.69; H, 5.82; N, 4.55. 1H NMR (CDCl3): δ 7.45 (m, 1H, 7-H in tetrahydronaphtalene); 7.19 (m, 1H, 6-H in tetrahydronaphtalene); 7.08-7.14 (m, 3H, 5-H in tetrahydronaphtalene and 3,5-H in 2-methylphenyl); 6.86 (m, 1H, 6-H in 2-methylphenyl); 6.68 (m, 1H, 4-H in 2-methylphenyl); 4.78 (m, 1H, 4-H in 2-methylphenyl); 3.51 (br.s, 1H, NH); 2.86-2.92 (m, 1H, 4- or 4′-H in tetrahydronaphtalene); 2.72-2.81 (m, 1H, 4′- or 4-H in tetrahydronaphtalene); 2.30-2.34 (m, 1H, 3- or 3′-H in tetrahydronaphtalene); 2.06 (s, 3H, CH3 in 2-methylphenyl); 1.85-1.97 (m, 1H, 3′- or 3-H in tetrahydronaphtalene); 1.77-1.81 (m, 1H, 2- or 2′-H in tetrahydronaphtalene); 1.59-1.67 (m, 1H, 2′- or 2-H in tetrahydronaphtalene). This mixture was stirred for 10 min at 90° C. the product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 50 ml of ethyl acetate The obtained solid was dissolved in 600 ml of methanol The resulting mixture was refluxed for 3 h cooled to room temperature evaporated to dryness The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 400 ml of methanol

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

Procedure: To a solution of 56.0 g (250 mmol) of 8-bromo-1,2,3,4-tetrahydronaphthalen-1-ol in 3500 ml of dichloromethane 265 g (1.23 mol) of PCC was added. The resulting mixture was stirred at room temperature for 5 h, then passed through a silica gel pad (500 ml), and evaporated to dryness. Yield 47.6 g (88%) of a colorless solid. Anal. Calc for C10H9BrO: C, 53.36; H, 4.03. Found: C, 53.44; H, 4.19. 1H NMR (CDCl3): δ 7.53 (m, 1H, 7-H); 7.18-7.22 (m, 2H, 5,6-H); 2.95 (t, J=6.1 Hz, 2H, 4,4′-H); 2.67 (t, J=6.6 Hz, 2H, 2,2′-H); 2.08 (qv, J=6.1 Hz, J=6.6 Hz, 2H, 3,3′-H). evaporated to dryness

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 57.1 g (533 mmol) of 2-methylaniline in 300 ml of toluene 25.3 g (133 mmol) of TiCl4 was added dropwise for 30 min at room temperature in argon atmosphere. The resulting mixture was stirred for 30 min at 90° C. followed by an addition of 30.0 g (133.0 mmol) 8-bromo-3,4-dihydronaphthalen-1(2H)-one. This mixture was stirred for 10 min at 90° C., poured into 500 ml of water, and the product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 50 ml of ethyl acetate. The obtained solid was dissolved in 600 ml of methanol, 15.4 g (244 mmol) of NaBH3CN and 5 ml of acetic acid were added in argon atmosphere. The resulting mixture was refluxed for 3 h, then cooled to room temperature, and evaporated to dryness. The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate. The combined organic extract was dried over Na2SO4 and evaporated to dryness. The residue was re-crystallized from 400 ml of methanol. Yield 33.2 g (79%) of a yellow crystalline powder. Anal. Calc. for C17H18BrN: C, 64.57; H, 5.74; N, 4.43. Found: C, 64.69; H, 5.82; N, 4.55. 1H NMR (CDCl3): δ 7.45 (m, 1H, 7-H in tetrahydronaphtalene); 7.19 (m, 1H, 6-H in tetrahydronaphtalene); 7.08-7.14 (m, 3H, 5-H in tetrahydronaphtalene and 3,5-H in 2-methylphenyl); 6.86 (m, 1H, 6-H in 2-methylphenyl); 6.68 (m, 1H, 4-H in 2-methylphenyl); 4.78 (m, 1H, 4-H in 2-methylphenyl); 3.51 (br.s, 1H, NH); 2.86-2.92 (m, 1H, 4- or 4′-H in tetrahydronaphtalene); 2.72-2.81 (m, 1H, 4′- or 4-H in tetrahydronaphtalene); 2.30-2.34 (m, 1H, 3- or 3′-H in tetrahydronaphtalene); 2.06 (s, 3H, CH3 in 2-methylphenyl); 1.85-1.97 (m, 1H, 3′- or 3-H in tetrahydronaphtalene); 1.77-1.81 (m, 1H, 2- or 2′-H in tetrahydronaphtalene); 1.59-1.67 (m, 1H, 2′- or 2-H in tetrahydronaphtalene). This mixture was stirred for 10 min at 90° C. the product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 50 ml of ethyl acetate The obtained solid was dissolved in 600 ml of methanol The resulting mixture was refluxed for 3 h cooled to room temperature evaporated to dryness The residue was diluted with 500 ml of water, and crude product was extracted with 3×200 ml of ethyl acetate The combined organic extract was dried over Na2SO4 evaporated to dryness The residue was re-crystallized from 400 ml of methanol

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

Procedure: To a solution of 56.0 g (250 mmol) of 8-bromo-1,2,3,4-tetrahydronaphthalen-1-ol in 3500 ml of dichloromethane 265 g (1.23 mol) of PCC was added. The resulting mixture was stirred at room temperature for 5 h, then passed through a silica gel pad (500 ml), and evaporated to dryness. Yield 47.6 g (88%) of a colorless solid. Anal. Calc for C10H9BrO: C, 53.36; H, 4.03. Found: C, 53.44; H, 4.19. 1H NMR (CDCl3): δ 7.53 (m, 1H, 7-H); 7.18-7.22 (m, 2H, 5,6-H); 2.95 (t, J=6.1 Hz, 2H, 4,4′-H); 2.67 (t, J=6.6 Hz, 2H, 2,2′-H); 2.08 (qv, J=6.1 Hz, J=6.6 Hz, 2H, 3,3′-H). evaporated to dryness