4-Imino-2,7-dimethyl-5,6,7,8-tetra­hydro-4H-1-benzothieno[2,3-d]pyrimidin-3-amine

In the title compound, C₁₂H₁₆N₄S, the fused benzothio­phene and the pyrimidine rings are coplanar [dihedral angle = 1.61 (6)°]. Three C atoms of the cyclohexene ring (at positions 3, 6 and 7) are disordered over two sites with an occupancy ratio of 0.702 (8):0.298 (8). The cyclo­hexene ring in both the major and minor components adopts a half-chair conformation. The crystal structure is stabilized by N—H...N and C—H...N inter­actions, resulting in the formation of inversion dimers with R₂²(10) and R₂²(12) graph-set motifs.

2-Amino-4-methyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonitrile

In the title compound, C₁₀H₁₂N₂S, the thio­phene ring is essentially planar (r.m.s. deviation = 0.0290 Å). The two C atoms of the cyclo­hexene ring (at positions 6 and 7) are disordered over two sets of sites in a 0.810 (5):0.190 (5) ratio. The cyclo­hexene rings in both the major and minor occupancy conformers adopt a half-chair conformation. In the crystal, there are two types of N—H...N inter­action. One of these results in centrosymmetric head-to-head dimers corresponding to an R₂²(12) graph-set motif and the other forms a 20-membered macrocyclic ring involving six mol­ecules.