2-methylidenetricyclo[9.4.0.03,8]pentadeca-1(15),3,5,7,11,13-hexaene

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

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

Procedure: In the same manner as in (2) in Example 2, hydrogen chloride gas was bubbled into the mixture of 20.6 g (0.1 mol) of 10,11-dihydro-5-methylene-5H-dibenzo[a,d]cycloheptene (4c), 41 g of acetic acid, and 4.5 g (0.15 mol) of paraformaldehyde. After reaction was conducted, the reaction product was extracted with toluene, neutralized with a saturated sodium bicarbonate solution, and washed with water. Further, this product was dried with sodium sulfate anhydride, concentrated and then recrystallized from hexane to obtain 23.4 g of the compound (5c). After reaction the reaction product was extracted with toluene washed with water Further, this product was dried with sodium sulfate anhydride concentrated recrystallized from hexane

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

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

Procedure: Dissolve 5-methylene-10,11-dihydro-5H-dibenzo[a,d]cycloheptene (10.00 g, 48.48 mmol) in CHCl3 (125 mL) and add 4-(dimethylamino)pyridinium tribromide (19.35 g, 53.32 mmol). Stir at room temperature for 2.5 h and quench with saturated aqueous Na2SO3. Separate layers, wash organics with saturated aqueous NaHCO3, then H2O. The dried organics (MgSO4) and concentrated to a yellow oil. Purify crude product by loading onto a 20 g plug of silica gel and eluting with hexanes until eluent shows no UV activity. Combine and concentrate hexane washes to afford 13.01 g (94%) of the title compound as a white solid, mp 73.6° C. HPLC shows 99% purity. quench with saturated aqueous Na2SO3 Separate layers, wash organics with saturated aqueous NaHCO3 The dried organics (MgSO4) and concentrated to a yellow oil Purify crude product eluting with hexanes until eluent shows no UV activity Combine and concentrate hexane washes

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

Procedure: Add methylmagnesium bromide (3M solution in Et2O, 48.0 mL, 144 mmol) dropwise to a cooled (0° C.) solution of dibenzosuberone (20.0 g, 96.03 mmol) in THF (140 mL) under N2 (exothermic). Let solution warm up to room temperature and continue stirring for 2 h. Cool solution to 0° C. and quench with saturated aqueous NH4Cl (exothermic, emits gas). Extract into ethyl acetate, dry organics (MgSO4) and concentrate in-vacuo. Dissolve residue in 4N HCl/dioxane (40 mL) and stir at room temperature overnight. Concentrate and dilute with H2O. Extract into ethyl acetate, dry organics (MgSO4) and concentrate to a yellow oil. Purify crude product by loading onto a 30 g plug of silica gel and eluting with hexanes until eluent shows no UV activity. Combine and concentrate hexane washes to afford 16.72 g (84%) of the title compound as a white solid, mp 65.1° C. HPLC shows 98% purity. Cool solution to 0° C. and quench with saturated aqueous NH4Cl (exothermic, emits gas) Extract into ethyl acetate, dry organics (MgSO4) concentrate in-vacuo Dissolve residue in 4N HCl/dioxane (40 mL) and stir at room temperature overnight Concentrate dilute with H2O Extract into ethyl acetate, dry organics (MgSO4) concentrate to a yellow oil Purify crude product eluting with hexanes until eluent shows no UV activity Combine and concentrate hexane washes

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

Procedure: Sparge a mixture of 5-methylene-10,11-dihydro-5H-dibenzo[a,d]cycloheptene (2.0 g, 9.7 mmol) (prepared as described in Journal of Organic Chemistry, 53 (8) 1768-1774 (1988)), 2-bromobenzonitrile ((1.77 g, 9.7 mmol), NaOAc (1 g, 12 mmol) and dimethylacetamide (100 mL) with nitrogen for 15 minutes. Add Hermann catalyst (320 mg, 0.46 mmol)(Chem. Eur. J. 1357-1364 (1997)) and heat at 150° C. for 6 days. Cool the reaction and partition between water (1 L) and EtOAc (500 mL). Wash the organic layer with water (3×1L). Dry (MgSO4) and concentrate under reduced pressure to give 3.3 g brown oil. Purify on silica gel using EtOAc/hexane 500 mg nitrile that is 81% pure by glc. Recrystallize (EtOH) to give 213 mg (7%) pale yellow plates, mp 185.4° C. 1H NMR (CDCl3) δ 3.04 (br d, 2H), 3.47 (br s, 2H), 6.82-7.34 (m, 11H), 7.62 (m, 2H); MS (ES) 308 (M+1). HPLC shows 98% purity. Sparge Cool the reaction partition between water (1 L) and EtOAc (500 mL) Wash the organic layer with water (3×1L) Dry (MgSO4) concentrate under reduced pressure

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

Procedure: Sparge a mixture of 5-methylene-10,11-dihydro-5H-dibenzo[a,d]cycloheptene (2.0 g, 9.7 mmol) (prepared as described in Journal of Organic Chemistry, 53 (8) 1768-1774 (1988)), 2-bromobenzonitrile ((1.77 g, 9.7 mmol), NaOAc (1 g, 12 mmol) and dimethylacetamide (100 mL) with nitrogen for 15 minutes. Add Hermann catalyst (320 mg, 0.46 mmol)(Chem. Eur. J. 1357-1364 (1997)) and heat at 150° C. for 6 days. Cool the reaction and partition between water (1 L) and EtOAc (500 mL). Wash the organic layer with water (3×1L). Dry (MgSO4) and concentrate under reduced pressure to give 3.3 g brown oil. Purify on silica gel using EtOAc/hexane 500 mg nitrile that is 81% pure by glc. Recrystallize (EtOH) to give 213 mg (7%) pale yellow plates, mp 185.4° C. 1H NMR (CDCl3) δ 3.04 (br d, 2H), 3.47 (br s, 2H), 6.82-7.34 (m, 11H), 7.62 (m, 2H); MS (ES) 308 (M+1). HPLC shows 98% purity. Sparge Cool the reaction partition between water (1 L) and EtOAc (500 mL) Wash the organic layer with water (3×1L) Dry (MgSO4) concentrate under reduced pressure

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

Procedure: In the same manner as in (2) in Example 2, hydrogen chloride gas was bubbled into the mixture of 20.6 g (0.1 mol) of 10,11-dihydro-5-methylene-5H-dibenzo[a,d]cycloheptene (4c), 41 g of acetic acid, and 4.5 g (0.15 mol) of paraformaldehyde. After reaction was conducted, the reaction product was extracted with toluene, neutralized with a saturated sodium bicarbonate solution, and washed with water. Further, this product was dried with sodium sulfate anhydride, concentrated and then recrystallized from hexane to obtain 23.4 g of the compound (5c). Theoretical yield, 92.0%; m.p., 103°-104° C. After reaction the reaction product was extracted with toluene washed with water Further, this product was dried with sodium sulfate anhydride concentrated recrystallized from hexane

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

Procedure: In the same manner as in (2) in Example 2, hydrogen chloride gas was bubbled into the mixture of 20.6 g (0.1 mol) of 10,11-dihydro-5-methylene-5H-dibenzo[a,d]cycloheptene (4c), 41 g of acetic acid, and 4.5 g (0.15 mol) of paraformaldehyde. After reaction was conducted, the reaction product was extracted with toluene, neutralized with a saturated sodium bicarbonate solution, and washed with water. Further, this product was dried with sodium sulfate anhydride, concentrated and then recrystallized from hexane to obtain 23.4 g of the compound (5c). After reaction the reaction product was extracted with toluene washed with water Further, this product was dried with sodium sulfate anhydride concentrated recrystallized from hexane