3,4-dihydro-2H-isoquinolin-1-one

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: To a solution of 3,4-dihydro-2H-isoquinolin-1-one (0.250 g, 1.70 mmol) in toluene (5 mL) was added sodium hydride (60% in mineral oil, 0.049 g, 2.04 mmol) and the resulting suspension was heated at about reflux for about 1 h. The reaction mixture was cooled at room temperature and ethyl 2-iodoacetate (0.364 g, 1.70 mmol) was added dropwise and the mixture was again heated at about reflux for about 12 h. The reaction mixture was cooled at room temperature and filtered, rinsed with toluene. The filtrate was concentrated in vacuo to provide (1-oxo-3,4-dihydro-1H-isoquinolin-2-yl)-acetic acid ethyl ester as a peach oil (0.336 g, 1.44 mmol). The crude material was used in subsequent reactions without further purification. the resulting suspension was heated at about reflux for about 1 h the mixture was again heated at about reflux for about 12 h The reaction mixture was cooled at room temperature filtered rinsed with toluene The filtrate was concentrated in vacuo

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Step 2 A mixture of 1,3-dibromo-2-methylbenzene (340 mg, 1.359 mmol), 3,4-dihydroisoquinolin-1(2H)-one (100 mg, 0.679 mmol) and potassium carbonate (94 mg, 0.679 mmol) in DMSO (2 mL) was purged with nitrogen, treated with copper (I) iodide (25.9 mg, 0.136 mmol) and heated at 150° C. for 3.5 h. The mixture was combined with that from a second reaction using 1,3-dibromo-2-methylbenzene (2.59 g, 10.36 mmol) and 3,4-dihydroisoquinolin-1(2H)-one (508 mg, 3.45 mmol), diluted with DCM and filtered through Celite. The filtrate was washed with 5% aqueous ammonium hydroxide, dried and concentrated. The residue was purified by column chromatography (eluting with hexane-EtOAc) to provide 2-(3-bromo-2-methylphenyl)-3,4-dihydroisoquinolin-1(2H)-one as a yellow solid (142 mg, 11%). 1H NMR (400 MHz, chloroform-d) δ 8.15 (1H, dd, J=7.70, 1.10 Hz), 7.55 (1H, dd, J=7.92, 1.10 Hz), 7.46-7.51 (1H, m), 7.37-7.42 (1H, m), 7.24-7.28 (1H, m), 7.17-7.21 (1H, m), 7.09-7.16 (1H, m), 3.95 (1H, ddd, J=12.21, 10.12, 4.73 Hz), 3.73 (1 H, ddd, J=11.94, 6.33, 5.28 Hz), 3.26 (1H, ddd, J=15.74, 10.23, 5.28 Hz), 3.06-3.14 (1H, m), 2.36 (3H, s). Mass spectrum m/z 316, 318 (M+H)+. was purged with nitrogen from a second reaction filtered through Celite The filtrate was washed with 5% aqueous ammonium hydroxide dried concentrated The residue was purified by column chromatography (eluting with hexane-EtOAc)

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

Procedure: To a solution of 3,4-dihydro-2H-isoquinolin-1-one (0.250 g, 1.70 mmol) in toluene (5 mL) was added sodium hydride (60% in mineral oil, 0.049 g, 2.04 mmol) and the resulting suspension was heated at about reflux for about 1 h. The reaction mixture was cooled at room temperature and ethyl 2-iodoacetate (0.364 g, 1.70 mmol) was added dropwise and the mixture was again heated at about reflux for about 12 h. The reaction mixture was cooled at room temperature and filtered, rinsed with toluene. The filtrate was concentrated in vacuo to provide (1-oxo-3,4-dihydro-1H-isoquinolin-2-yl)-acetic acid ethyl ester as a peach oil (0.336 g, 1.44 mmol). The crude material was used in subsequent reactions without further purification. the resulting suspension was heated at about reflux for about 1 h the mixture was again heated at about reflux for about 12 h The reaction mixture was cooled at room temperature filtered rinsed with toluene The filtrate was concentrated in vacuo

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

Procedure: from 3,4-dihydroisoquinolin-1(2H)-one and 1,4-dibromobutane

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

Procedure: from 3,4-dihydroisoquinolin-1(2H)-one and 3-bromopropanol

Conditions: temp:96.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a round-bottom flask under argon containing (S)-5-bromo-2-((2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-3,4-dihydroisoquinolin-1(2H)-one (227 mg, 0.79 mmol), 4-chloro-3-(5-phenyl-1H-imidazol-2-yl) aniline (213 mg, 0.79 mmol), Pd2(dba)3 (143 mg, 0.158 mmol), xantphos (260 mg, 0.316 mmol), potassium phosphate (505 mg, 2.37 mmol) is added anhydrous dioxane (1.6 ml). The mixture is stirred at 96° C. for 18 hours, cooled to room temperature, filtered through a celite pad and washed with THF. The crude product is purified by flash column chromatography using 1% methanol in dichloromethane as eluent to give S)-5-(4-Chloro-3-(5-phenyl-1H-imidazol-2-yl)phenylamino)-2-(2,2-dimethyl-1,3-dioxolan-4-yl)methyl)-3,4-dihydroisoquinolin-1(2H)-one as a dark brown solid. LC-MS m/z: 530.1 (M+1). cooled to room temperature filtered through a celite pad washed with THF The crude product is purified by flash column chromatography

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

Procedure: KNO3 (348 mg, 3.7414 mmol) was added to a solution of 3,4-dihydro-2H-isoquinolin-1-one (I-23b: 500 mg, 3.4013 mmol) in concentrated H2SO4 (10.2 mL) at 0° C. and the resulting mixture was stirred at room temperature for 3 hours. The reaction was monitored by TLC (80% ethylacetate in hexane). The reaction mixture was quenched in chilled water and extracted with ethylacetate. The organic layer was washed with brine solution, dried over Na2SO4 and concentrated. The concentrate was crystallized from diethyl ether to afford 400 mg of the product (61.2% yield). The reaction mixture was quenched in chilled water extracted with ethylacetate The organic layer was washed with brine solution dried over Na2SO4 concentrated The concentrate was crystallized from diethyl ether

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

Procedure: Using analogous reaction conditions as described in Example 1, 3,4-dihydro-2H-isoquinolin-1-one (I-23b: 150 mg, 1.0204 mmol) was reacted with 3-iodo-4-methyl-pyridine (223.4 mg, 1.0204 mmol), 1,4-dioxane (3 mL), copper iodide (19.4 mg, 0.1020 mmol), trans-N,N′-dimethyl-cyclohexyl-1,2-diamine (48.1 mL, 0.3061 mmol) and potassium phosphate (540.8 mg, 2.551 mmol) to afford the crude product. Purification by column chromatography on silica gel (50% ethylacetate in hexane) afforded 85 mg of the product (35% yield). reaction conditions to afford the crude product Purification by column chromatography on silica gel (50% ethylacetate in hexane)

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Phenethyl-carbamic acid ethyl ester (I-23a: 9 g, 46.875 mmol) and poly phosphoric acid (187.5 g) were taken in a flask and the flask was heated to 120° C. for 4 hours. The reaction was monitored by TLC (30% ethylacetate in hexane). The reaction mixture was partitioned between chilled water and ethylacetate. The resulting mixture was stirred at 115° C. for 2 hours to afford the crude product. Purification by column chromatography on silica gel (60% ethylacetate in hexane) afforded 0.090 g of the product (9.1% yield). The reaction mixture was partitioned between chilled water and ethylacetate to afford the crude product Purification by column chromatography on silica gel (60% ethylacetate in hexane)

Conditions: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Step 2 A mixture of 1,3-dibromo-2-methylbenzene (340 mg, 1.359 mmol), 3,4-dihydroisoquinolin-1(2H)-one (100 mg, 0.679 mmol) and potassium carbonate (94 mg, 0.679 mmol) in DMSO (2 mL) was purged with nitrogen, treated with copper (I) iodide (25.9 mg, 0.136 mmol) and heated at 150° C. for 3.5 h. The mixture was combined with that from a second reaction using 1,3-dibromo-2-methylbenzene (2.59 g, 10.36 mmol) and 3,4-dihydroisoquinolin-1(2H)-one (508 mg, 3.45 mmol), diluted with DCM and filtered through Celite. The filtrate was washed with 5% aqueous ammonium hydroxide, dried and concentrated. The residue was purified by column chromatography (eluting with hexane-EtOAc) to provide 2-(3-bromo-2-methylphenyl)-3,4-dihydroisoquinolin-1(2H)-one as a yellow solid (142 mg, 11%). 1H NMR (400 MHz, chloroform-d) δ 8.15 (1H, dd, J=7.70, 1.10 Hz), 7.55 (1H, dd, J=7.92, 1.10 Hz), 7.46-7.51 (1H, m), 7.37-7.42 (1H, m), 7.24-7.28 (1H, m), 7.17-7.21 (1H, m), 7.09-7.16 (1H, m), 3.95 (1H, ddd, J=12.21, 10.12, 4.73 Hz), 3.73 (1 H, ddd, J=11.94, 6.33, 5.28 Hz), 3.26 (1H, ddd, J=15.74, 10.23, 5.28 Hz), 3.06-3.14 (1H, m), 2.36 (3H, s). Mass spectrum m/z 316, 318 (M+H)+. was purged with nitrogen from a second reaction filtered through Celite The filtrate was washed with 5% aqueous ammonium hydroxide dried concentrated The residue was purified by column chromatography (eluting with hexane-EtOAc)