Thienopyrimidines

Thienopyrimidine scaffolds combine a sulfur-containing aromatic unit with a fused diazine-like core, creating a compact privileged motif for kinase-oriented chemistry. They are frequently used when a programme needs a fused heteroaromatic scaffold that differs from quinazolines while preserving strong medicinal chemistry relevance. This category supports lead-generation work, heterocycle synthesis, and scaffold replacement strategies.