HCID 58739083, compound → HCID 58739067, compound

Participants

Reaction Steps

A solution of 2-(1,1-dioxo-1λ6-[1,2]thiazinan-2-yl)-5-benzyloxy-1-methyl-6-oxo-1,6-dihydro-pyrimidine-4-carboxylic acid ethyl ester (4.05 g, 9.61 mmol) in a mixture of ethanol (250 ml) and ethyl acetate (250 ml) was hydrogenated over 10% palladium on activated carbon (0.9 g) and under 1 atmosphere of hydrogen for 1 h. The catalyst was then filtered and the solvent was evaporated under reduced pressure. Recrystallization of the residue from ethyl acetate gave 2.63 g (82% yield) of the title ester as white crystals; mp 186–189° C. 1HNMR 400 MHz (CDCl3) δ (ppm): 1.42 (3H, t, J=7.0 Hz, CH3), 1.6–1.63 (1H, m, CH), 2.3–2.6 (3H, m, CH2 and CH), 3.2 (1H, m, CH), 3.55–3.75 (2H, m, CH2), 3.65 (3H, s, NCH3), 3.95–4.05 (1H, m, CH), 4.44 (2H, q, J=7.0 Hz, OCH2). HRMS (FAB POS) calculated for C12H18N3O6S [M+H+]: 332.091632. found: 332.092342.

Provenance & Evidence