6,7,8,9-tetrahydro-5H-benzo[7]annulen-5-ol

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

Procedure: To a solution of 1.6 g (10 mmol) of 6,7,8,9-Tetrahydro-5H-benzocyclohepten-5-ol in 75 mL of benzene was added p-toluene sulfonic acid (19 mg, 0.1 mmol). The mixture was refluxed overnight using Dean-Stark equipment. After removal of the solvent, the residue was repartitioned between ethyl acetate and water. The organic layers was washed with saturated sodium bicarbonate solution, water and brine and dried over sodium sulfate. Removal of the solvent gave 1.3 g (88%) of 6,7-Dihydro-5H-benzocycloheptene(compound 23,scheme 11). The mixture was refluxed overnight After removal of the solvent The organic layers was washed with saturated sodium bicarbonate solution, water and brine dried over sodium sulfate Removal of the solvent

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

Procedure: To a solution of isopropyl 4-imidazolecarboxylate (601 mg, 3.9 mmol) in THF (30 mL) is added 6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ol (CAS#35550-94-8, 487 mg, 3.0 mmol), which can be prepared as described in Ollivier, R.; et al. Journal of Medicinal Chemistry, 1997, 40, 952-960, followed by triphenylphosphine (1.02 g, 3.9 mmol). The reaction is cooled to 0° C. and diisopropyl azodicarboxylate (755 μL, 3.9 mmol) is added. The reaction is permitted to warm to room temperature and stirred until LC-MS analysis indicates complete consumption of 6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ol. The reaction mixture is diluted with saturated aqueous NaHCO3 and ethyl acetate. The layers are separated and the organic layer is dried with Na2SO4, filtered, and concentrated. The resulting residue is purified by silica gel flash chromatography (ethyl acetate-dichloromethane, 0:1 to 1:1) to provide 3-(6,7,8,9-tetrahydro-5H-benzocyclohepten-5-yl)-3H-imidazole-4-carboxylic acid isopropyl ester; HRMS: (ESI) m/z 299.1775 [(M+H)+; calcd for C18H23N2O2: 299.1760]; 1H NMR (400 MHz, CDCl3) δ ppm 1.18 (d, J=6.3 Hz, 3 H), 1.23 (d, J=6.3 Hz, 3 H), 1.36-1.50 (m, 1 H), 1.87-2.24 (m, 4 H), 2.37-2.49 (m, 1 H), 2.85-2.95 (m, 1 H), 2.97-3.09 (m, 1 H), 4.99-5.14 (m, 1 H), 5.94 (d, J=7.8 Hz, 1 H), 6.44 (d, J=10.6 Hz, 1 H), 6.97-7.08 (m, 1 H), 7.08-7.21 (m, 2 H), 7.82-7.93 (m, 2 H). The HCl salt of the title compound can be prepared by dissolution in diethyl ether, followed by treatment with an excess of 1N HCl in diethyl ether. The resulting heterogeneous solution is concentrated to furnish the HCl salt of 3-(6,7,8,9-tetrahydro-5H-benzocyclohepten-5-yl)-3H-imidazole-4-carboxylic acid isopropyl ester. can be prepared to warm to room temperature consumption of 6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ol The reaction mixture is diluted with saturated aqueous NaHCO3 and ethyl acetate The layers are separated the organic layer is dried with Na2SO4 filtered concentrated The resulting residue is purified by silica gel flash chromatography (ethyl acetate-dichloromethane, 0:1 to 1:1)

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

Procedure: With stirring and ice cooling, 111 g of triethylamine was added to a mixture of 120 g of methacrylic acid chloride, 240 g of 6,7,8,9-tetrahydro-5H-benzocyclohepten-5-ol, and 1500 g of toluene. The mixture was stirred at room temperature for 16 hours. By standard aqueous work-up and solvent distillation, a crude product was obtained. It was purified by column chromatography, yielding the target compound, 6,7,8,9-tetrahydro-5H-benzocyclohepten-5-yl methacrylate. The mixture was stirred at room temperature for 16 hours By standard aqueous work-up and solvent distillation a crude product was obtained It was purified by column chromatography