1-(isocyanatomethyl)-4-methylbenzene

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

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

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 4-phenyl-1-pyrrolidin-3-yl-piperidine dihydrochloride (preparation #7) (0.050 g, 0.165 mmol) and triethylamine (0.092 mL, 0.66 mmol) in dichloromethane (1 mL) was added 1-isocyanatomethyl-4-methyl-benzene (0.024 g, 0.165 mmol) and the reaction mixture was stirred at ambient temperature for about 16 h. The reaction mixture was concentrated in vacuo and the residue was purified by flash chromatography on silica gel using 5% MeOH/EtOAc as the mobile phase to give 3-(4-phenyl-piperidin-1-yl)-pyrrolidine-1-carboxylic acid 4-methyl-benzylamide (0.042 g, 68%). RP-HPLC (Table 1, Method b) Rt 1.72 min; m/z: (M+H)+ 378. The reaction mixture was concentrated in vacuo the residue was purified by flash chromatography on silica gel using 5% MeOH/EtOAc as the mobile phase

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

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

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

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

Procedure: Following the synthetic procedure of 6a as described in Example 1, compound 61 (54% yield) was synthesized from benzo[d]isothiazol-3-one and 4-methylbenzyl isocyanate as a white solid. mp 171-173° C.; IR(KBr) 3281, 1711, 1650, 1538 cm−1; 1H-NMR (DMSO-d6) δ2.27 (s, 3H), 4.48 (d, J=5.8 Hz, 2H), 7.14 (d, J=8.2 Hz, 2H), 7.24 (d, J=8.2 Hz, 2H), 7.48 (t, J=7.8 Hz, 1H), 7.78 (t, J=8.2 Hz, 1H), 7.93 (d, J=7.8 Hz, 1H), 8.01 (d, J=8.2 Hz, 1H), 9.22 (br t, J=5.8 Hz, 1H); ESIMS m/e 299 (M++1).

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

Procedure: Reagents: Benzylisothiocyanate (6.5 mmol, 0.85 mL), 4-methylbenzyl-isocyanate (6.5 mmol, 0.90 mL) and SO2Cl2 (6.5 mmol, 0.52 mL) in diethyl ether (25 mL). Isolation: filtration of reaction mixture. Purification: recrystallization from MeOH. Isolation: filtration of reaction mixture Purification recrystallization from MeOH

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

Procedure: To a solution of 4-phenyl-1-pyrrolidin-3-yl-piperidine dihydrochloride (preparation #7) (0.050 g, 0.165 mmol) and triethylamine (0.092 mL, 0.66 mmol) in dichloromethane (1 mL) was added 1-isocyanatomethyl-4-methyl-benzene (0.024 g, 0.165 mmol) and the reaction mixture was stirred at ambient temperature for about 16 h. The reaction mixture was concentrated in vacuo and the residue was purified by flash chromatography on silica gel using 5% MeOH/EtOAc as the mobile phase to give 3-(4-phenyl-piperidin-1-yl)-pyrrolidine-1-carboxylic acid 4-methyl-benzylamide (0.042 g, 68%). RP-HPLC (Table 1, Method b) Rt 1.72 min; m/z: (M+H)+ 378. The reaction mixture was concentrated in vacuo the residue was purified by flash chromatography on silica gel using 5% MeOH/EtOAc as the mobile phase

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

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

Procedure: A 0° C. slurry of α-amino-γ-butyrolactone hydrobromide (25 g, 0.137 mol) in THF (200 mL) was combined with 1-isocyanatomethyl-4-methyl-benzene (20.6 g, 0.139 mol) and then treated dropwise with N,N-diisopropylethylamine (19.5 g, 0.151 mol). The reaction mixture was stirred for at room temperature for 2 h. The solvent was removed in vacuo to give 48.5 g crude 1-(4-methyl-benzyl)-3-(2-oxo-tetrahydro-furan-3-yl)-urea that was utilized directly in the next reaction without purification. MS (ES30 ) Calc'd for C13H17N2O3 (M+1) 249. Found m/z 249 (100%). 1H NMR. The solvent was removed in vacuo