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 Visible-Light-Induced Radical Carbo-Cyclization/gem-Diborylation through Triplet Energy Transfer between a Gold Catalyst and Aryl Iodides, published in 2020-06-10, which mentions a compound: 16400-32-1, mainly applied to photochem cyclization diboration propargyl ether thioether amine preparation heterocycle; benzofuran benzothiophene indole diboronate preparation photochem diboration propargylic compound; gold diphosphine photocatalyst cyclization diboration propargyl ether thioether amine, Formula: C5H7Br.
Gem-Diboronates I (X = O, S, NBoc; R1 = H, halo, MeCO, MeO2C, tBu, CF3, MeSO2NH; R2 = H, Me, Et; R3 = H, Me, iPr, Bu) were prepared by photochem. diboration of propargylic substrates 2-I-R1C6H3XCHR3CCR2 with B2pin2 catalyzed by gold complex [Au2(μ-dppm)2(OTf)2] with up to 90% yields. Geminal diboronates have attracted significant attention because of their unique structures and reactivity. However, benzofuran-, indole- and benzothiophene-based benzylic gem-diboronates, building blocks for biol. relevant compounds, are unknown. A promising protocol using visible light and aryl iodides for constructing valuable building blocks, including benzofuran-, indole- and benzothiophene-based benzylic gem-diboronates, via radical carbo-cyclization/gem-diborylation of alkynes with a high functional group tolerance is presented. The utility of these gem-diboronates has been demonstrated by a ten gram scale conversion, by versatile transformations, by including the synthesis of approved drug scaffolds and two approved drugs, and even by polymer synthesis. The mechanistic investigation indicates that the merging of the dinuclear gold catalyst (photoexcitation by 315-400 nm UVA light) with Na2CO3 is directly responsible for photosensitization of aryl iodides (photoexcitation by 254 nm UV light) with blue LEDs light (410-490 nm, λmax = 465 nm) through an energy transfer (EnT) process, followed by homolytic cleavage of the C-I bond in the aryl iodide substrates.
I hope my short article helps more people learn about this compound(1-Bromo-2-pentyne)Formula: C5H7Br. Apart from the compound(16400-32-1), you can read my other articles to know other related compounds.
Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics