This diagram depicts the chemical structure of pyrimidine, a six-membered aromatic ring with two nitrogen atoms at positions 1 and 3 (highlighted in blue). The remaining positions are occupied by ...

These compounds, which are characterized by a six-membered aromatic ring with two carbonyl groups, exhibit a range of biological activities, making them valuable in medicinal chemistry.

First, the chemists used a [3 + 2] cycloaddition between distibene and diazoolefins to make diazadistiboylidenes—five-membered rings that contain two antimony atoms, two nitrogen atoms ...