2-methylsulfanyl-4,5-dihydro-1H-imidazole;hydroiodide

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

Procedure: C-(6-Benzenesulfonyl-1,2,3,4-tetrahydro-naphthalen-1-yl)-methylamine (100 mg, 0.31 mmol) and 2-methylsulfanyl-4,5-dihydro-1H-imidazole hydroiodide (76 mg, 0.31 mmol) were added to 2 mL CH2Cl2, and the reaction mixture was heated to gentle reflux until all of the solvent was evaporated. The reaction mixture was heated to 150° C. for 30 minutes and then cooled. The crude mixture was basified by dropwise addition of aqueous NaOH solution, and then purified by preparative liquid chromatography (CH2Cl2/MeOH 90:10) on a short silica gel column. Removal of the solvent afforded 57 mg (47%) of (6-Benzenesulfonyl-1,2,3,4-tetrahydro-naphthalen-1-ylmethyl)-(4,5-dihydro-1H-imidazol-2-yl)-amine. MS: 370 (M+H)+. the reaction mixture was heated to gentle reflux until all of the solvent was evaporated cooled The crude mixture was basified by dropwise addition of aqueous NaOH solution purified by preparative liquid chromatography (CH2Cl2/MeOH 90:10) on a short silica gel column Removal of the solvent

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

Procedure: Triethylamine (0.59 g) and 2-methylthio-2-imidazoline hydroiodide (1.4 g) were added to a solution of 4-amino-N-((1-(5-aminopentyl)-piperidin-4-yl)methyl)-5-chloro-2-methoxybenzamide (1.5 g) in methanol (20 ml), and the mixture was stirred at refluxing temperature for 4 hr. A 10% aqueous sodium hydroxide solution was added to the reaction mixture, and the mixture was extracted with chloroform. The extract was washed with brine and dried. The solvent was evaporated under reduced pressure, and the obtained residue was purified by silica gel column chromatography to give 0.84 g of 4-amino-5-chloro-N-((1-(5-(imidazolin-2-ylamino)pentyl)piperidin-4-yl)methyl)-2-methoxybenzamide. at refluxing temperature for 4 hr the mixture was extracted with chloroform The extract was washed with brine dried The solvent was evaporated under reduced pressure the obtained residue was purified by silica gel column chromatography

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

Procedure: C-(6-Benzenesulfonyl-1,2,3,4-tetrahydro-naphthalen-1-yl)-methylamine (100 mg, 0.31 mmol) and 2-methylsulfanyl-4,5-dihydro-1H-imidazole hydroiodide (76 mg, 0.31 mmol) were added to 2 mL CH2Cl2, and the reaction mixture was heated to gentle reflux until all of the solvent was evaporated. The reaction mixture was heated to 150° C. for 30 minutes and then cooled. The crude mixture was basified by dropwise addition of aqueous NaOH solution, and then purified by preparative liquid chromatography (CH2Cl2/MeOH 90:10) on a short silica gel column. Removal of the solvent afforded 57 mg (47%) of (6-Benzenesulfonyl-1,2,3,4-tetrahydro-naphthalen-1-ylmethyl)-(4,5-dihydro-1H-imidazol-2-yl)-amine. MS: 370 (M+H)+. the reaction mixture was heated to gentle reflux until all of the solvent was evaporated cooled The crude mixture was basified by dropwise addition of aqueous NaOH solution purified by preparative liquid chromatography (CH2Cl2/MeOH 90:10) on a short silica gel column Removal of the solvent

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

Procedure: 1.04 grams (0.005 mole) of 5H-dibenzo[a,d]cyclohepten-5-ylamine, 1.22 grams (0.005 mole) of 2-methylmercapto-4,5-dihydroimidazole hydroiodide, and 1.5 milliliters of triethylamine were mixed together in 20 milliliters of ethanol and heated at reflux temperature for 16 hours. Thereafter most of the ethanol was evaporated, some n-butanol added and the resulting mixture heated under reflux for 15 hours. At the end of this period, the solvent was removed under reduced pressure, and residue obtained to which was added first, aqueous sodium bicarbonate, then ether and the resulting mixture stirred and decanted to recover the non-dissolving solid as residue. The solid was stirred overnight with ether, filtered and crystallized from ethanol. It was purified by chromatographing on a silica gel column employing 6 percent methanol in chloroform as eluant to obtain the desired N-(2-imidazolidinylidene)-5H-dibenzo[a,d]cyclohepten-5-amine hydroiodide product. Elemental analyses were as follows: heated at reflux temperature for 16 hours Thereafter most of the ethanol was evaporated some n-butanol added the resulting mixture heated under reflux for 15 hours At the end of this period, the solvent was removed under reduced pressure, and residue obtained to which was added first decanted to recover the non-dissolving solid as residue filtered crystallized from ethanol It was purified by chromatographing on a silica gel column

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

Procedure: 1.04 grams (0.005 mole) of 5H-dibenzo[a,d]cyclohepten-5-ylamine, 1.22 grams (0.005 mole) of 2-methylmercapto-4,5-dihydroimidazole hydroiodide, and 1.5 milliliters of triethylamine were mixed together in 20 milliliters of ethanol and heated at reflux temperature for 16 hours. Thereafter most of the ethanol was evaporated, some n-butanol added and the resulting mixture heated under reflux for 15 hours. At the end of this period, the solvent was removed under reduced pressure, and residue obtained to which was added first, aqueous sodium bicarbonate, then ether and the resulting mixture stirred and decanted to recover the non-dissolving solid as residue. The solid was stirred overnight with ether, filtered and crystallized from ethanol. It was purified by chromatographing on a silica gel column employing 6 percent methanol in chloroform as eluant to obtain the desired N-(2-imidazolidinylidene)-5H-dibenzo[a,d]cyclohepten-5-amine hydroiodide product. Elemental analyses were as follows: heated at reflux temperature for 16 hours Thereafter most of the ethanol was evaporated some n-butanol added the resulting mixture heated under reflux for 15 hours At the end of this period, the solvent was removed under reduced pressure, and residue obtained to which was added first decanted to recover the non-dissolving solid as residue filtered crystallized from ethanol It was purified by chromatographing on a silica gel column

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

Procedure: 6.90 grams (0.024 mole) of 3-bromo-5H-dibenzo[a,d]cycloheptene-5-ylamine, 2.95 grams (0.012 mole) of 2-methylmercapto-4,5-dihydroimidazole hydroiodide, and 65 milliliters of absolute ethanol were stirred together and refluxed for 28 hours. At the end of this period, the solvent was evaporated under reduced pressure and the residue triturated with five 100 milliliter portions of diethyl ether to obtain a purified residue. The purified residue was dissolved in 20 milliliters of absolute ethanol and 300 milliliters of ether added thereto whereupon a solid precipitated. The mixture was stirred thoroughly, the solvent decanted to obtain a residue which was placed on a Still-silica column and eluted with 5 percent methanol in chloroform. The eluted fractions were examined by thin layer chromatography (TLC), the homogeneous TLC fractions combined, and the solvent then vaporized to obtain the desired N-(2-imidazolidinylidene)-3-bromo-5H-dibenzo[a,d]cyclohepten-5-amine hydroiodide product as residue. The product was crystallized from chloroform to obtain purified product, m.p. 240°-241° C. (dec.). Elemental analyses were as follows: Calc'd for C18H17BrIN3 : C, 44.84; H, 3.55; N, 8.72. Found: C, 44.75; H, 3.48; N, 8.46. refluxed for 28 hours At the end of this period, the solvent was evaporated under reduced pressure the residue triturated with five 100 milliliter portions of diethyl ether to obtain a purified residue whereupon a solid precipitated the solvent decanted to obtain a residue which eluted with 5 percent methanol in chloroform

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

Procedure: 6.90 grams (0.024 mole) of 3-bromo-5H-dibenzo[a,d]cycloheptene-5-ylamine, 2.95 grams (0.012 mole) of 2-methylmercapto-4,5-dihydroimidazole hydroiodide, and 65 milliliters of absolute ethanol were stirred together and refluxed for 28 hours. At the end of this period, the solvent was evaporated under reduced pressure and the residue triturated with five 100 milliliter portions of diethyl ether to obtain a purified residue. The purified residue was dissolved in 20 milliliters of absolute ethanol and 300 milliliters of ether added thereto whereupon a solid precipitated. The mixture was stirred thoroughly, the solvent decanted to obtain a residue which was placed on a Still-silica column and eluted with 5 percent methanol in chloroform. The eluted fractions were examined by thin layer chromatography (TLC), the homogeneous TLC fractions combined, and the solvent then vaporized to obtain the desired N-(2-imidazolidinylidene)-3-bromo-5H-dibenzo[a,d]cyclohepten-5-amine hydroiodide product as residue. The product was crystallized from chloroform to obtain purified product, m.p. 240°-241° C. (dec.). Elemental analyses were as follows: Calc'd for C18H17BrIN3 : C, 44.84; H, 3.55; N, 8.72. Found: C, 44.75; H, 3.48; N, 8.46. refluxed for 28 hours At the end of this period, the solvent was evaporated under reduced pressure the residue triturated with five 100 milliliter portions of diethyl ether to obtain a purified residue whereupon a solid precipitated the solvent decanted to obtain a residue which eluted with 5 percent methanol in chloroform

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

Procedure: Procedure 1 is repeated with substitution of 2-(methylthio)-3,4,5,6-tetrahydropyrimidine hydroiodide for the 2-(methylthio)-2-imidazoline hydroiodide specified. The resulting 8-amino-3,4-dihydro-9-[(4-chlorophenyl)methyl]-7-nitroso-2H,5H-pyrimido(1,2-a)pyrimidin-6(9H)-one is converted to the corresponding 7-formylamino compound according to the method of Procedure 2, and the latter is then cyclized to the desired product by the method of Procedure 4.

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

Procedure: Procedure 1 is repeated with substitution of 4,5-dimethyl-2-(methylthio)-2-imidazoline hydroiodide for the 2-(methylthio)-2-imidazoline hydroiodide specified. The resulting 7-amino-2,3-dihydro-2,3-dimethyl-8-[(4-chlorphenyl)methyl]-6-nitrosoimidazo[1,2-a]pyrimidin-5(8H)-one is converted to the corresponding 6-formylamino compound by the method of Procedure 2 and the latter is converted to the desired product by the method of Procedure 4.

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

Procedure: A mixture of 29.25 g. (0.40 mole) isobutylamine and 48.82 g. (0.20 mole) 2-(methylthio)-2-imidazoline hydroiodide in 250 ml. abs. EtOH were refluxed for 2 hr. The mixture was concentrated in vacuo to a viscous oil, which was dissolved in 100 ml. abs. EtOH and added to a solution of 18.40 g. (0.80 mole) sodium and 22.62 g. (0.20 mole) ethyl cyanoacetate in 1200 ml. abs. EtOH. The mixture was refluxed for 3 hr., then concentrated in vacuo to a viscous oil. Water (400 ml.) was added and a white solid slowly crystallized. The solid was filtered and air-dried to yield 35.43 g. (86%), mp 235°-238° (two crops). Recrystallization from CH3CN gave white crystals, mp 230.5°-232.5° (corr.). A mixture of 29.25 g The mixture was concentrated in vacuo to a viscous oil, which was dissolved in 100 ml EtOH and added to a solution of 18.40 g The mixture was refluxed for 3 hr , then concentrated in vacuo to a viscous oil Water (400 ml.) was added a white solid slowly crystallized The solid was filtered air-dried to yield 35.43 g Recrystallization from CH3CN gave white crystals, mp 230.5°-232.5° (corr.)

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

Procedure: To a solution of 62.30 g. 0.44 mol) of 4-chlorobenzylamine in 500 ml absolute EtOH (dried over 4A molecular sieve aluminosilicate desiccant) is added 107.40 g (0.44 mol) 2-(methylthio)-2-imidazoline hydroiodide. The mixture is heated to boiling on a steam bath in an open flask and about 150 ml of the ethanol is allowed to slowly boil off over 2 hr. This solution is added while still hot to 1.76 mole of sodium ethoxide in 1650 ml absolute EtOH. To the resulting stirred, basic solution of 2-[(4-chlorophenyl)methyl]amino-2-imidazoline is then added 61.85 g (0.44 mol) crystalline (mp 129°-131°) ethyl oximinocyanoacetate in portions. The bright yellow solution is refluxed for 3 hr and then cooled to room temperature. The yellow precipitate is collected, washed with i-PrOH, and partially air-dried. The damp sodium salt is dissolved in 2000 ml H2O and acidified with glacial HOAc. The bright pink precipitate is filtered and aid-dried overnight, then oven-dried in vacuo at 100° to yield 103.05 g (77%) of pink powder, mp 238°-241°d. Recrystallization of this material from DMF-EtOH gives red crystals, mp 241°d. The mixture is heated to boiling on a steam bath in an open flask The bright yellow solution is refluxed for 3 hr The yellow precipitate is collected washed with i-PrOH partially air-dried The damp sodium salt is dissolved in 2000 ml H2O The bright pink precipitate is filtered aid-dried overnight oven-dried in vacuo at 100°

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

Procedure: 3-Azaspiro[5,5]undecane (0.38 g, 2 mmol) and 2-methylthio-2-imidazoline hydroiodide (0.44 g, 1.8 mmol) was refluxing in CH3OH overnight, concentrated in vacuo and purified by flash chromatography to give yellow oil (0.26 g, 65% yield). 1H NMR (360 MHz, CDCl3) δ 8.27 (br s, 2H), 3.72 (s, 4H), 3.39 (t, J=5.83 Hz, 4H), 1.50 (t, J=5.94 Hz, 4H), 1.47-1.44 (m, 10H); 13C NMR (90 MHz, CDCl3) δ 159.48, 43.39, 42.73, 36.02, 35.26, 30.83, 26.65, 21.61. 21.49; ESI-MS: Calculated for C13H24IN3 (M−I)+ 222.3, Found: 222.5. concentrated in vacuo purified by flash chromatography