Table 1.

Reductive amination of 3: synthesis of the 2,3-diaminopropanol intermediates.

Reagent	Product	2,3-Diaminopropanol Structure	Yield (%) 1
	4		92
	5		90
	6		90
	7		91
	8		89
	9		82
	10		85

¹ Yields in final products obtained after chromatography.