In 1998,Organic Reactions (Hoboken, NJ, United States) included an article by Rickborn, Bruce. Product Details of 5952-93-2. The article was titled 《The retro-Diels-Alder reaction. Part II. Dienophiles with one or more heteroatom》. The information in the text is summarized as follows:
A review of the article The retro-Diels-Alder reaction. Part II. Dienophiles with one or more heteroatom. In the experiment, the researchers used many compounds, for example, Methyl 1-methyl-1H-pyrazole-4-carboxylate(cas: 5952-93-2Product Details of 5952-93-2)
Methyl 1-methyl-1H-pyrazole-4-carboxylate(cas: 5952-93-2) belongs to pyrazoles. Pyrazoles and their related multiring analogs are common elements of a wide variety of bioactive compounds. These ring structures are rare in nature. A consequence of this is that they have previously been thought to be poor moieties to include in potential new drugs. Product Details of 5952-93-2
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics