反应详情

The title compound was prepared according to general method A as described above in Example 1 by reacting 2-[(R)-2-amino-1-propylthio]benzothiazole hydrochloride (prepared as described in Example 5) (0.89 g, 3.0 mmol) with 9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-6-chloro-2-methyl-9H-purine (1.07 g, 2.5 mmol) [prepared from 2-methylinosine (Journal of Organic Chemistry, 1967, 32, 3258-3260) by standard acylation and chlorination steps]. Deacylation of the purified 2',3',5'-tri-O-acetyl-N-[(R)-1-(2-benzothiazolyl)thio-2-propyl]-2-methyladenosine using sodium methoxide in methanol to provide the desired N-[(R)-1-(2-benzothiazolyl)thio-2-propyl]-2-methyladenosine (0.28 g, 11%) (following column chromatography), 1H NMR (DMSO-d6) δ1.40 (3H, d, --CHCH3), 2.30 (3H, s, --CH3), 3.50-3.77 (4H, m, H-5'a and H-5'b and --CH2 --), 3.98 (1H, d, H-4'), 4.13 (1H, d, H-3'), 4.63 (1H, q, H-2'), 4.86 (1H, br, --CHCH3), 5.19, 5.42 (2H, 2d, 2'- and 3'-OH), 5.70 (1H, t, 5'-OH), 5.85 (1H, d, H-1'), 7.36, 7.47 (2H, 2t, Ar--H), 7.80-7.96 (2H, m, Ar--H), 8.0 (1H, s, N--H), 8.26 (1H, s, H-8), 8.52 (1H, s, N--H). HPLC retention time 22.4 min [gradient elution, 20-80% acetonitrile/water (containing 0.1% TFA)].

1. customThe title compound was prepared