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CAS No. : | 1127-74-8 | MDL No. : | MFCD03426404 |
Formula : | C10H11NO | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | NKRKBYFBKLDCFB-UHFFFAOYSA-N |
M.W : | 161.20 | Pubchem ID : | 294788 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99% | With pyridine; In dichloromethane; at 20℃; | To a stirring solution of 1,2,3,4-tertahydrobenzo[bjazepine-5-one (50 g, 0.31 mol) in DCM (250 mL) was added pyridine (175 mL). The mixture was cooled with ice bath and TsC1 (84 g, 0.44 mol) was added. The mixture was warmed to room temperature and stirredovernight. Water (750 mL) was added and the mixture was extracted with DCM (300 mL3). The combined organic phase was washed with water, brine, dried over anhydrous Na2504 and concentrated under reduced pressure. The residue was washed with a mixed solvent (petroleum ether/EtOAc = 70:1) to give the title product as a light yellowish solid (97 g, 99%). ESI MS m/z = 316.05 [M+Hf |
97.8% | With pyridine; In dichloromethane; at 20℃; for 2h;Cooling with ice; | To a stirring solution of 2,3,4,5-tetrahydro-1H-1-benzazepin-5-one (50 g, 310.17 mmol) in DCM (250 mL) was added pyridine (175 mL). The mixture was cooled with ice bath and TsCl (84.0 g, 440.76 mmol) was added. The mixture was warmed to room temperature and stirred 2 hrs. Water (750 mL) was added and the mixture was extracted with DCM (4×300 mL). The combined organic phase was washed with brine, dried and concentrated under reduced pressure. The residue was washed with mixed solvent (PE:EA=50:1) to give the desired compound (95.7 g, 97.8%) as an off-white solid. ESI-MS m/z: 333.15 [M+NH4]+. |
In pyridine; at 50℃; for 1h;Product distribution / selectivity; | Step 1. Preparation of (+/-) 1- (Toluene-4-sulfonyl)-1, 2,3, 4-tetrahydro-benzo [b] azepin-5- one. To a solution of 1, 2,3, 4-Tetrahydro-benzo [b] azepin-5-one (500 mg, 3.1 mmol) in pyridine (2 ml) is added p-toluenesulfonyl chloride (650 mg, 3.4 mmol), and the mixture is heated at 50 C for 1 hour. The reaction mixture is poured into IN HCl (100 ml) and extracted with ethyl acetate (3x20 ml). The combined organic extracts are washed with brine, dried (Na2SO4), and concentrated to a solid. The solid is purified by silica gel column chromatography (eluent, 30 % ethyl acetate in hexanes) to give the title compound as a solid. Mass spectrum (ES+): 316 (M+H). |
18.9 g | With pyridine; at 20℃; for 12h;Cooling with ice; | Reference Example 12 1-tosyl-3,4-dihydro-1H-benzo[b]azepine-5(2H)-one 3,4-dihydro-1H-benzo[b]azepine-5(2H)-one (10.0 g) was dissolved into pyridine (30 mL), thereto was added p-toluenesulfonyl chloride (13.6 g) under an ice bath and the reaction mixture was stirred at room temperature for 12 hours. The reaction solution was added with water (60 mL) and then stirred at room temperature for 40 minutes. The obtained crystal was collected by filtration and washed with water, and then dried to thus obtain the title compound (18.9 g) as a light yellow white solid. 1H-NMR (400 MHz, CDCl3) delta7.71 (ddd, J=7.8, 1.7, 0.4 Hz, 1H), 7.59 (d, J=8.3 Hz, 2H), 7.55-7.46 (m, 2H), 7.41-7.35 (m, 1H), 7.23-7.30 (m, 2H), 3.86 (t, J=6.6 Hz, 2H), 2.45-2.39 (m, 5H), 2.00-1.91 (m, 2H). ESI/MS (m/z) 316 (M+H)+. |
18.9 g | With pyridine; at 20℃; for 12h;Cooling with ice; | 3,4-Dihydro-1H-benzo[b]azepine-5(2H)-one (10.0g)Dissolved in pyridine (30 mL),Toluenesulfonium chloride (13.6 g) was added under ice bath, and stirred at room temperature for 12 hours. Water (60 mL) was added to the reaction mixture, and the mixture was stirred at room temperature for 40 minutes. The obtained crystals were collected by filtration, washed with water, and dried to give the title compound (18.9 g) as pale yellow white solid. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
79% | With PPA; at 100℃; for 1.5h; | Polyphosphoric acid (25g) was heated at 100C under nitrogen until it could be stirred. 1-(Toluene-4-sulfonyl)-1,2,3,4-tetrahydro-benzo[b]azepin-5-one from Example E5.4 (2.6g, 8.2 6mmol) was added portionwise and the reaction mixture was heated at 100C for 1.5h. It was poured into ice and basified with 2M NaOH(aq). The aqueous layer was extracted twice with dichloromethane. The organic extracts were combined, washed with brine, dried and reduced in vacuo. The residue was purified by flash chromatography on silica gel (eluant; 40% EtOAc: 60% hexane) to yield the title compound (1.05g, 79%). |
Step 5. Preparation of 1, 2,3, 4-Tetrahydro-benzo [b] azepin-5-one. To preheated polyphosphoric acid (PPA, 220 g) at 70-80 C was added 1- (Toluene-4-sulfonyl)-1, 2,3, 4-tetrahydro-benzo [b] azepin-5-one (50.0 g, 0.16 mol). The mixture was stirred for 3.0 h at the same temperature and then poured into ice water. After the pH was adjusted to about 8-9 by adding aq NaOH, the mixture was extracted with ethyl acetate. The organic layer was separated, dried over MgS04, and concentrated. The residue was purified by silica gel column chromatography (eluent, 3: 1 n-hexanes: ethyl acetate) to give 1, 2,3, 4-Tetrahydro-benzo [b] azepin-5-one (22g). |
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