(+)-(1R,4S)-4-(6-Amino-9H-purin-9-yl)-2-cyclopentene-1-methanol (1R,4S)-4-(6-Chloro-9H-purin-9-yl)-2-cyclopentene-1-methanol → [(1R,4S)-4-(6-aminopurin-9-yl)cyclopent-2-en-1-yl]methanol

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Reaction Steps

(+)-(1R,4S)-4-(6-Amino-9H-purin-9-yl)-2-cyclopentene-1-methanol (1R,4S)-4-(6-Chloro-9H-purin-9-yl)-2-cyclopentene-1-methanol (from part e of this example, 2.00 g, 7.98 mmol) was stirred in liquid ammonia (50 mL) in a Parr bomb at 25° C. for 18 hours. Evaporation of volatiles and crystallization of the residual solid from methanol-acetonitrile gave title compound as white prisms (1.61 g, 87%), m.p. 195-200° C.; 1H-NMR (DMSO-d6) δ: 8.15 (s, 1H), 8.06 (s, 1H), 7.21 (br s, 2H), 6.15 and 5.95 (two m, 2H), 5.61 (m, 1H), 4.76 (t, J=5.4 Hz, 1H), 3.48 (t, J=5.5 Hz, 2H), 2.92 (m, 1H), 2.71 (m, 1H), 1.67 (m, 1H ); [α]589+4.5° (c 0.5, methanol).

Provenance & Evidence