Diisopropylethylamine → 2-[({9-[(2R,3R,4S,5R)-3,4-Dihydroxy-5-(methoxymethyl)tetrahydro-2-furanyl]-6-[(2,2-diphenylethyl)amino]-9H-purin-2-yl}methyl)amino]-N,N-diisopropylacetamide

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The title compound was prepared by a similar method to example 40 using {9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(methoxymethyl)tetrahydro-2-furanyl]-6-[(2,2-diphenylethyl)amino]-9H-purin-2-yl}methyl methanesulfonate (preparation 25) (374 mg, 0.66 mmol), 2-amino-N,N-diisopropylacetamide (520 mg, 3.3 mmol) (preparation 22) and N-ethyl-N-isopropyl-2-propanamine (170 mg, 1.32 mmol). The compound was purified by column chromatography on silica gel eluting with a solvent gradient of dichloromethane:methanol:ammonia (95:5:0.5) increasing in polarity to (90:10:1). The solvent was removed under reduced pressure to give a residue which was triturated with diethyl ether to give the title compound (47 mg) as a solid. MS: 632 (MH+).

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