Reference of 6287-82-7, Chemical Research Letters, May 2021. As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. In a article, 6287-82-7, molcular formula is C8H4Br2S, introducing its new discovery.
A new methodology involving 1,7-dipolar cyclizations of conjugated dipoles followed by a multistep rearrangement affording ring-contracted products has been employed for the synthesis of various examples of the title compounds.Under different thermolysis conditions the annulated alkynyl nitrones 15-19, 45, and 46 are converted into isoannulated pyrroles and alpha-pyridones, respectively, with yields up to 90percent (general reaction A –> B + C).The product distribution is strongly influenced by the nature of the thermal substituent R, hence supporting a mechanism with oxo carbenes as central intermediates which undergo either 6-? cyclization to the pyrrole systems or Wolff rearrangement leading to conjugated ketenes, the precursors of the observed alpha-pyridones (see Scheme 1).Diels-Alder reactions were performed with benzofuropyridone 40a, naphthopyridone 62 as well as with the corresponding dihydronaphtho compounds 64a, b.Whereas the tert-butyl derivatives 22b, 23b and 41b are rather unreactive against dienophiles, they are easily transformed into the cyclic imides 31, 32 and 52, respectively, under the influence of oxygen anf light suggesting the formation and subsequent <4 + 2> cycloaddition of 1O2 as important steps. – Key Words: Pyrroles, heteroannulated / alpha-Pyridones, heteroannulated / Pentalenes, dihetero- / Nitrones / Heterocyclizations, 1,7-dipolar / Diels-Alder reactions / Singlet oxygen
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Reference of 6287-82-7. In my other articles, you can also check out more blogs about 6287-82-7
Reference:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem