In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Rapid Generation of Privileged Substructure-Based Compound Libraries with Structural Diversity and Drug-Likeness, published in 2014-04-14, which mentions a compound: 21778-81-4, mainly applied to indolecarboxaldehyde amine carboxylic acid isonitrile Ugi intramol arylation cyclization; heterocyclic compound library preparation structural diversity drug likeness, Category: pyridazine.
A library of privileged-substructure-based, heterocyclic compounds was constructed by a sequence of Ugi four-component reactions incorporating the indole motif and microwave-assisted cyclizations in branched pathways. Cheminformatic anal. confirmed that the library exhibited a high degree of structural diversity and good drug-likeness.
Compounds in my other articles are similar to this one(5-Methoxy-1H-indole-2-carbaldehyde)Category: pyridazine, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem