The phrase "aryl rings" is correct and usable in written English.
It is typically used in the context of chemistry to refer to aromatic rings that contain one or more aromatic substituents.
Example: "The compound was analyzed for the presence of aryl rings, which are known to influence its reactivity."
Alternatives: "aromatic rings" or "phenyl groups".
The modest selectivity for the arylation of the electron-rich aryl rings is similar to that observed with Pd-catalyzed arylation using aryl halides involving a CMD electrophilic palladation step.
As such, we explored the arylation of the amine substrate 27- OMs bearing two electronically differentiated aryl rings that could undergo C H functionalization.
Phthalic anhydride and phenol react to give phenolphthalein, which is similar in structure to fluorescein but lacks the oxygen linking two of the aryl rings.
The chemistry involved in these reactions was unclear until 1866, when Kekulé proposed correctly that the products have aryl rings linked through a −N=N− unit, called an azo group; hence, the dyes containing this functional group are termed the azo dyes.
In fused systems containing chelate and aryl rings, the aryl rings prefer to stack with the chelate rather than with other aryl rings.
The orientation of aryl rings in relation to isoxazole heterocycle was confirmed by X-ray crystallography.
If the aryl ring for arylation was electron-rich, such as in N- 4- methoxypheN- 4pyridin-2-amethoxyphenyl pyridin-2-aminenerally found (entries 6–10).
Malachite green differs from crystal violet by having one unsubstituted aryl ring.
When the hydroxyl group is joined to an aryl ring, a phenol results (shown above).
In two analogues (34 and 36), the methoxy substitution pattern in the fused aryl ring varied, while in another derivative (35) the phenolic moiety was translocated from the pendant 2-aryl ring to position-7 of the fused aryl ring.
In the majority of examples, the pendant 2-aryl ring contained a 3-hydroxy-4-methoxy substitution pattern, and the fused aryl ring featured a 6-methoxy group.
