4-Methyl-6-(piperidin-1-yl)pyrimidin-2-amine.

The title compound, C(10)H(16)N(4), crystalizes with two mol-ecules (A and B) in the asymmetric unit in which the dihedral angles between the piperidine and pyrimidine rings are 47.5 (1) and 10.3 (1)°. The four C atoms of the pyrimidine ring in one of the mol-ecules are disordered over two sets of sites with occupancy factors 0.508 (11):0.492 (11). In the crystal, the A mol-ecules are linked to one another through N-H⋯N hydrogen bonds, generating R(2) (2)(8) ring patterns and forming inversion dimers. These dimers are further connected on either side to a B molecule through pairs of N-H⋯N hydrogen bonds, resulting in a tetra-meric unit.

Ethyl 5-bromo-naphtho-[2,1-b]furan-2-carboxyl-ate.

In the title compound, C(15)H(11)BrO(3), the dihedral angle between the naphtho-furan ring system (r.m.s. deviation = 0.022 Å) and the side chain is 4.50 (2)°. In the crystal, short Br⋯Br [3.4435 (7) Å] contacts propagating along [010] in a zigzag manner and weak π-π inter-actions [shortest centroid-centroid separation = 3.573 (2) Å] directedalong [100] are observed.