So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Li, Cally; Mellerup, Soren K.; Wang, Xiang; Wang, Suning researched the compound: 1-(2-Bromophenyl)-1H-pyrazole( cas:87488-84-4 ).Safety of 1-(2-Bromophenyl)-1H-pyrazole.They published the article 《Accessing Two-Stage Regioselective Photoisomerization in Unsymmetrical N,C-Chelate Organoboron Compounds: Reactivity of B(ppz)(Mes)Ar》 about this compound( cas:87488-84-4 ) in Organometallics. Keywords: regioselective photoisomerization uv vis fluorescence Zimmerman rearrangement organoboron; crystal structure mol optimized nitrogen carbon chelate organoboron preparation. We’ll tell you more about this compound (cas:87488-84-4).
A new family of unsym., N,C-chelate organoboron compounds B(ppz)(Mes)Ar have been synthesized and found to undergo a rare, regioselective two-stage photoisomerization, involving the Ar group only. The initial transformation is a Zimmerman rearrangement to afford yellow azaboratabisnorcaradiene isomers that are subsequently converted to unprecedented 14aH-diazaborepins via a photochem. “”walk”” rearrangement. Spectroscopic and computational studies provide insight into the formation and properties of these unique systems.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem