6-chloro-2-N,4-N-dipropyl-1,3,5-triazine-2,4-diamine → 6-[1,2]oxazinan-2-yl-N,N'-dipropyl-[1,3,5]triazine-2,4-diamine

Participants

Reaction Conditions

Reaction Steps

An ACE® pressure tube was charged with 2-chloro-N-(4,6-bis-(n-propylamino)-[1,3,5]triazine (XXXIV) (1.50 g, 6.53 mmol), N-ethyldiisopropylamine (19.59 mmol), 1,2-oxazinane hydrochloride (1.61 g, 13.06 mmol) and tetrahydrofuran. The reaction mixture was heated at 100° C. for 2 h, then cooled and poured into saturated NaHCO3 solution (50 mL). The suspension was extracted with EtOAc (3×25 mL). The combined organic extracts were washed with water (50 mL), brine (50 mL) and dried over Na2SO4. The solvent was removed under reduced pressure and the crude product was purified by flash column chromatography using gradient elution from CH2Cl2/EtOH (99:1) to CH2Cl2/EtOH (95:5) to yield 6-[1,2]oxazinan-2-yl-N,N′-dipropyl-[1,3,5]triazine-2,4-diamine (LVII) (1.63 g, 89%). ESI-MS (m/z): 281 [M+H]+.

Provenance & Evidence