(1R,2S,3R,5S)-3-(6-{[Bis-(4-methoxy-phenyl)-methyl]-amino}-2-chloro-purin-9-yl)-5-(di-Boc-amino)-cyclopentane-1,2-diol → {(1S,2R,3S,4R)-4-[2-Chloro-6-(1-ethyl-propylamino)-purin-9-yl]-2,3-dihydroxy-cyclopentyl}-propionyl-carbamic acid tert-butyl ester

Participants

Reaction Steps

The title compound is prepared from {(1S,4R)-4-[2-chloro-6-(1-ethyl-propylamino)-purin-9-yl]-cyclopent-2-enyl}-propionyl-carbamic acid tert-butyl ester using a procedure analogous to that of (1R,2S,3R,5S)-3-(6-{[bis-(4-methoxy-phenyl)-methyl]-amino}-2-chloro-purin-9-yl)-5-(di-Boc-amino)-cyclopentane-1,2-diol (see Example 1). Purification by reverse phase column chromatography (Isolute™ C18, 0-100% acetonitrile in water—0.1% TFA). 1H nmr (MeOD, 400 MHz); 8.10(s, 1H), 4.80(m, 1H), 4.65(m, 1H), 4.35(m, 1H), 4.20(m, 1H), 2.85(m, 2H), 2.60(m, 1H), 2.35(m, 1H), 1.70(m, 2H), 1.65(s, 9H), 1.60(m, 2H), 1.15(t, 3H), 0.95(t, 6H).

Provenance & Evidence