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 Synthesis and Study of Some New Histidine Derivatives, published in 2014-04-30, which mentions a compound: 542-58-5, mainly applied to Schiff base imidazole oxazole preparation, Synthetic Route of C4H7ClO2.
The oxazole I was prepared by reaction of histidine with acetic anhydride, which on treatment with thiosemicarbazide afforded ((4-(1H-imidazol-4-ylmethyl)-2-methyl-4,5-dihydro-1,3-oxazol-5-ylidene)amino)thiourea (Schiff base) . The desired histidine derivatives, e.g., II, were synthesized from Schiff base and oxazole I via various organic reactions.
Although many compounds look similar to this compound(542-58-5)Synthetic Route of C4H7ClO2, numerous studies have shown that this compound(SMILES:CC(OCCCl)=O), has unique advantages. If you want to know more about similar compounds, you can read my other articles.