3-methoxy-2-methylpropane-1,2-diamine

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

Procedure: 180 mg (0.57 mmol) of 8-[(2,6-difluorobenzyl)oxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylic acid Example 3A, 237 mg (0.62 mmol) of HATU and 0.30 ml (1.70 mmol) of N,N-diisopropylethylamine were initially charged in 3.6 ml of DMF, and the mixture was stirred at RT for 20 min. 74 mg (0.62 mmol) of rac-3-methoxy-2-methylpropane-1,2-diamine were then added and the reaction mixture was stirred at RT overnight. The reaction solution was diluted with water/TFA and purified by preparative RP-HPLC (acetonitrile/water gradient with addition of 0.1% TFA). The product fraction was concentrated. The residue was taken up in dichloromethane and washed twice with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted twice with dichloromethane and the combined organic phases were dried over sodium sulphate, filtered and concentrated. This gave 136 mg (56% of theory, purity 98%) of the title compound. the reaction mixture was stirred at RT overnight purified by preparative RP-HPLC (acetonitrile/water gradient with addition of 0.1% TFA) The product fraction was concentrated washed twice with saturated aqueous sodium bicarbonate solution The aqueous phase was extracted twice with dichloromethane the combined organic phases were dried over sodium sulphate filtered concentrated

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

Procedure: 180 mg (0.57 mmol) of 8-[(2,6-difluorobenzyl)oxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylic acid Example 3A, 237 mg (0.62 mmol) of HATU and 0.30 ml (1.70 mmol) of N,N-diisopropylethylamine were initially charged in 3.6 ml of DMF, and the mixture was stirred at RT for 20 min. 74 mg (0.62 mmol) of rac-3-methoxy-2-methylpropane-1,2-diamine were then added and the reaction mixture was stirred at RT overnight. The reaction solution was diluted with water/TFA and purified by preparative RP-HPLC (acetonitrile/water gradient with addition of 0.1% TFA). The product fraction was concentrated. The residue was taken up in dichloromethane and washed twice with saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted twice with dichloromethane and the combined organic phases were dried over sodium sulphate, filtered and concentrated. This gave 136 mg (56% of theory, purity 98%) of the title compound. the reaction mixture was stirred at RT overnight purified by preparative RP-HPLC (acetonitrile/water gradient with addition of 0.1% TFA) The product fraction was concentrated washed twice with saturated aqueous sodium bicarbonate solution The aqueous phase was extracted twice with dichloromethane the combined organic phases were dried over sodium sulphate filtered concentrated