Oxoammonium salts are catalysing efficient and selective halogenation of olefins, alkynes and aromatics was written by Wang, Weijin;Li, Xinyao;Yang, Xiaoxue;Ai, Lingsheng;Gong, Zhiwen;Jiao, Ning;Song, Song. And the article was included in Nature Communications in 2021.Category: ethers-buliding-blocks The following contents are mentioned in the article:
Herein, TEMPO (2,2,6,6-tetramethylpiperidine nitroxide) and its derivatives are disclosed as active catalysts for electrophilic halogenation of olefins e.., prop-1-en-1-ylbenzene, alkynes R1CCR2 (R1 = octyl, Ph; R2 = H, Me, n-Bu, Ph), and aromatics R3H (R3 = 3-(carboxymethyl)-4-methoxybenzen-1-yl, 2-[ethoxy(oxo)methane]-1H-indol-3-yl, 5-phenylthiophen-2-yl, etc.). These catalysts are stable, readily available, and reactive enough to activate haleniums including Br+, I+ and even Cl+ reagents. This catalytic system is applicable to various halogenations including haloarylation of olefins or dibromination of alkynes, which were rarely realized in previous Lewis base catalysis or Lewis acid catalysis. The high catalytic ability is attributed to a synergistic activation model of electrophilic halogenating reagents, where the carbonyl group and the halogen atom are both activated by present TEMPO catalysis. This study involved multiple reactions and reactants, such as 4-Benzyloxyphenol (cas: 103-16-2Category: ethers-buliding-blocks).
4-Benzyloxyphenol (cas: 103-16-2) belongs to ethers. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Category: ethers-buliding-blocks
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem