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 Stereoselective Synthesis of Cyclohepta[b]indoles by Visible-Light-Induced [2+2]-Cycloaddition/retro-Mannich-type Reactions, published in 2021-05-17, which mentions a compound: 7524-52-9, mainly applied to pyrrolocycloheptaindole stereoselective preparation; iridium photocatalyst tandem cycloaddition retro Mannich reaction indolylalkyl enaminone; stereoselective photochem cycloaddition retro Mannich reaction indolylalkyl enaminone; [2+2]/retro-Mannich-type cycloaddition; amine radical cation; cyclohepta[b]indole; photoredox catalysis, Synthetic Route of C12H15ClN2O2.
A novel method for the concise synthesis of cyclohepta[b]indoles in high yields was developed. The method involves a visible-light-induced, photocatalyzed [2+2]-cycloaddition/ retro-Mannich-type reaction of enaminones such as I to yield cycloheptaindoles such as II. Exptl. and computational studies suggested that the reaction is a photoredox process initiated by single-electron oxidation of enaminones, which undergo subsequent cyclobutane formation and rapid fragmentation of the intermediate radical cations to form cyclohepta[b]indoles.
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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem