6-fluoro-5-methoxy-1H-indole

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

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10-20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63-69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10-20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63-69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10–20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63–69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered

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

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10–20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63–69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered

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

Procedure: A solution of sodium ethoxide (formed by dissolving NaH 11.45 g, 60% in oil, 286.2 mmol, 4 eq.) in ethanol was poured into an EtOH solution of (5-fluoro-4-methoxy-2-trimethylsilanylethynyl-phenyl)-carbamic acid ethyl ester (22.14 g, 71.55 mmol) in EtOH (250 mL). The reaction was allowed to stir at room temperature for 2 hours and heated to 75° C. overnight. The EtOH was removed in vacuo and the residue diluted with water. The aqueous suspension was extracted 2×300 mL with Et2O. The organics were combined and washed with brine. The organic layer was collected, dried over MgSO4, filtered, and the solvent removed in vacuo leaving a dark red oil. The oil was purified by silica gel flash column chromatography using 15% EtOAc in hexanes as the mobile phase. Removal of the solvent in vacuo from the fractions containing the product left a golden yellow oil which solidified on standing: 1H NMR (300 MHz, CDCl3): 3.93 (s, 3H), 6.48 (m, 1H), 7.15 (m, 3H), 8.11 (bs, 1H); MS(ES+): m/z 166 (M+H)+; MS(ES−): m/z 164 (M−H)−; Calculated for C9H8FNO: C, 65.45; H, 4.88; N, 8.48; found: C, 65.17; H, 4.97; N, 8.70. heated to 75° C. overnight The EtOH was removed in vacuo the residue diluted with water The aqueous suspension was extracted 2×300 mL with Et2O washed with brine The organic layer was collected dried over MgSO4 filtered the solvent removed in vacuo leaving a dark red oil The oil was purified by silica gel flash column chromatography Removal of the solvent in vacuo from the fractions containing the product left a golden yellow oil which

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10–20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63–69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10-20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63-69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered

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

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: POCl3 (10.9 ml, 71 mmol) is added dropwise to 21 ml of dimethylformamide under N2 at 10–20° C., is stirred 15 minutes, then a 13 ml dimethylformamide solution of 5-methoxy-6-fluoro-indole (J. Med. Chem., 22:63–69, 1979; 10.7 g, 64.7 mmol) is added at a rate to keep the reaction temperature between 10 and 20° C. After the addition is complete, the mixture is stirred for 1 hour. Crushed ice and aqeuous NaOH (12.5 g/50 ml H2O) is added to reaction. The resulting mixture is heated to reflux with a heat gun for 1 minute, cooled to 10° C., and is filtered to give 11.8 g of 6-fluoro-5-methoxy-1H-indole-3-carbaldehyde (95%). the reaction temperature between 10 and 20° C After the addition the mixture is stirred for 1 hour The resulting mixture is heated to reflux with a heat gun for 1 minute is filtered