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 The oxidation of N-alkyl-3(5)-methyl-4-formylpyrazoles under phase-transfer catalysis, published in 2012, which mentions a compound: 890652-02-5, mainly applied to formylpyrazole derivative oxidation phase transfer catalysis, Application of 890652-02-5.
We have proposed a method of oxidation of pyrazole-4-carboxaldehydes to the corresponding carboxylic acids under phase-transfer catalysis at low temperature (20-30 °C) and with high yields (70-75%). Under these conditions, oxidation proceeds slowly but chemoselectively without oxidation of the Me group.
Although many compounds look similar to this compound(890652-02-5)Application of 890652-02-5, numerous studies have shown that this compound(SMILES:O=CC1=C(C)N(CCC)N=C1), has unique advantages. If you want to know more about similar compounds, you can read my other articles.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method