On December 31, 2021, Wang, Weijin; Li, Xinyao; Yang, Xiaoxue; Ai, Lingsheng; Gong, Zhiwen; Jiao, Ning; Song, Song published an article.Application In Synthesis of 2-Methoxynaphthalene The title of the article was Oxoammonium salts are catalysing efficient and selective halogenation of olefins, alkynes and aromatics. And the article contained the following:
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. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Application In Synthesis of 2-Methoxynaphthalene
The Article related to dibromoolefin preparation, olefin halogenation tetramethylpiperidine nitroxide catalyst, dibromoalkyne preparation, alkyne halogenation tetramethylpiperidine nitroxide catalyst, haloarene preparation regioselective, aromatic halogenation tetramethylpiperidine nitroxide catalyst and other aspects.Application In Synthesis of 2-Methoxynaphthalene
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