Water → HCID 57940470, compound

Participants

Reaction Steps

9-allyl-2-chloro-8,9-dihydro-5,7,7-trimethyl-5H-pyrimido[4,5-b][1,4]diazepin-6(7H)-one (1.21 g, 4.34 mmol, prepared by method C) and dichloro(2,7-dimethyl-octa-2,6-diene-1,8-yl) ruthenium (IV) (0.26 g, 0.43 mmol, prepared following Tetrahedron Letters, 1965, 47, 4187) were suspended in dioxane (10 mL) and water (30 mL) in a pressure tube. The resultant suspension was stirred at 100° C. over two nights. The reaction was allowed to cool to room temperature and filtered through celite. The celite was washed copiously with water and DCM. The combined filtrates were concentrated under reduced pressure and partitioned between brine and DCM. The aqueous layer was extracted with dichloromethane (5×20 mL) and the combined organics were dried over sodium sulfate, filtered and concentrated under reduced pressure to give a brown gum. This gum was purified by column chromatography (50% EtOAc in hexanes, loaded on silica, ˜100 mL silica) to give a white solid, which was triturated with diethyl ether. The solid was collected by filtration and washed with diethyl ether (1×2 mL) and pentane (3×2 mL) to give a cream powder (351 mg, 34% yield). NMR DMSO D6 1.09 (6H, s), 3.22 (3H, s), 3.25 (2H, d), 8.08 (1H, s), 8.48 (1H, br d); MS (ES+) 241.

Provenance & Evidence