(2R)-3-aminopropane-1,2-diol → (R)-2-(1,2-dihydroxypropan-3-ylamino)-8-isopropyl-4-[4-(pyridin-2-yl)benzylamino]pyrazolo[1,5-a]-1,3,5-triazine

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Reaction Steps

According to the same conditions resulting in the preparation of the compound 2, the compound 10 is prepared from IIa.2 by oxidation reaction of the sulfur atom and then introduction of commercial (R)-3-amino-1,2-propanediol. Yield=35%. Oil. 1H NMR (300 MHz, CDCl3): δ 8.69 (d, 1H, J=4.5 Hz, Harom), 7.98 (d, 2H, J=8.3 Hz, Harom), 7.79-7.70 (m, 2H, Harom) 7.66 (s, 1H, Harom), 7.45 (d, 2H, J=8.3 Hz, Harom), 7.27.28-7.22 (m, 1H, Harom), 6.80 (bs, 1H, NB), 4.78 (d, 2H, J=5.8 Hz, CH2), 3.83-3.79 (m, 1H, CH), 3.65-3-3.55 (m, 4H, 2 CH2), 3.03 (hept, 1H, J=7.0 Hz, CH), 1.28 (d, 6H, J=7.0 Hz, 2 CH3). MS (BSI): m/z 434 (MH+).

Provenance & Evidence