Crystal structure of methyl 4-(4-hy­droxy­phen­yl)-6-methyl-2-oxo-1,2,3,4-tetra­hydro­pyrimidine-5-carboxyl­ate monohydrate

The title hydrate, C(13)H(14)N(2)O(4)·H(2)O, crystallizes with two formula units in the asymmetric unit (Z′ = 2). The dihedral angles between the planes of the tetra­hydro­pyrimidine ring and the 4-hy­droxy­phenyl ring and ester group are 86.78 (4) and 6.81 (6)°, respectively, for one mol­ecule and 89.35 (4) and 3.02 (4)° for the other. In the crystal, the organic mol­ecules form a dimer, linked by a pair of N—H⋯O hydrogen bonds. The hydroxy groups of the organic mol­ecules donate O—H⋯O hydrogen bonds to water mol­ecules. Further, the hy­droxy group accepts N—H⋯O hydrogen bonds from amides whereas the water mol­ecules donate O—H⋯O hydrogen bonds to the both the amide and ester carbonyl groups. Other weak inter­actions, including C—H⋯O, C—H⋯π and π–π, further consolidate the packing, generating a three-dimensional network.