Examples of 'pyridine ring' in a sentence
Meaning of "pyridine ring"
In organic chemistry, a pyridine ring refers to the specific structure or molecular moiety associated with the compound pyridine. It is a heteroaromatic ring system composed of six carbon atoms and one nitrogen atom, which gives pyridine its distinctive properties and reactivity. Pyridine rings are commonly found in various organic compounds and pharmaceutical drugs
How to use "pyridine ring" in a sentence
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pyridine ring
The pyridine ring should remain unsubstituted.
The second one used functionalization of the pyridine ring.
Reduction of a pyridine ring to a piperidine ring.
This provides a bicyclic ring system containing a pyridine ring.
It consists of a pyridine ring substituted with three methyl groups.
Pyridylsilanes syntheses have been achieved by regioselective metallation reactions of the pyridine ring.
Preferred pyridine ring systems of formula IVc are shown below.
Such an alkyl group may be situated in any position of the pyridine ring.
Preferred pyridine ring systems of formula IVa are shown below.
The pyridodiazepinones prepared in this manner have in common a bromine substitution in the pyridine ring.
Hydrogenation of the pyridine ring of XX affords a substituted piperidine product.
A compound of any one of the preceding claims wherein Y represents a pyridine ring.
At physiological pH, the aromatic pyridine ring is uncharged and hydrophobic.
PAF antagonistic acitvity is also very dependent on the substitution of the pyridine ring.
Compounds containing an unfused pyridine ring ( whether or not hydrogenated ) in the structure.
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Suitable examples of B include trivalent groups derived from a benzene ring and a pyridine ring.
The group at the 4 - position of the pyridine ring is preferably an electron withdrawing group.
Most preferred C ring is a phenyl ring or a pyridine ring.
One substitutent at C3 of the pyridine ring can be an hydroxyalkyl group.
This method is particularly advantageous when the ring A is a pyridine ring.
One substituted at C3 of the pyridine ring can be an hydroxyalkyl group.
Particularly preferred are those compounds wherein Ring Q represents a benzene or pyridine ring.
A substituted pyridinesulfonamide compound of this invention has a pyridine ring with an N-substituted aminocarbonyl group.
Isoquinoline and quinoline are benzopyridines, which are composed of a benzene ring fused to a pyridine ring.
One substituent at C3 of the pyridine ring can be an hydroxyalkyl group.
Preferable site is the 3-position relative to the nitrogen atom on the pyridine ring.
The pyridine ring is part of two B vitamins, niacin and pyridoxine.
For certain of these embodiments, the fused pyridine ring is unsubstituted.
Ar2 is pyridine ring substituted with none, one or more halogen.
Metabolic pathways of vismodegib in humans include oxidation, glucuronidation, and an uncommon pyridine ring cleavage.
Ar2 is pyridine ring substituted with none, one or more fluorine.
Substitution can occur at the ortho, meta or para positions relative to the pyridine ring.
It is also critical that the pyridine ring be joined directly to the 17-carbon atom.
These patents describe compounds with a methoxy group in the 4-position of the pyridine ring.
Chemically it is based on a pyridine ring structure, with hydroxyl, methyl, aminomethyl, and hydroxymethyl substituents.
Among these, suitable examples can include a benzene ring, a pyridine ring and a triazine ring.
The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins.
Examples of the above hetero ring include thiophene ring, furan ring and pyridine ring.
In certain of these embodiments, the fused pyridine ring is substituted by one -O-R3 group.
Nicotine contains an N-methylpyrrolidine ring linked to a pyridine ring.
Furthermore, the N-atom of the pyridine ring can be present as an N-oxide group.
Oxides are understood as meaning the N-oxide derivatives of the pyridine ring.
The ring " A " is more preferably a pyridine ring or a pyrazine ring, particularly preferably a pyridine ring.
And pharmaceutically acceptable salts and N-oxides on the pyridine ring thereof.
Is a pyridine ring which can have one or more substituent ( s ) ;.
The invention further involves the corresponding N-oxides on the pyridine ring.
Is a pyridine ring which can have one or more substituent ( s ) ; is hydrogen ;.
The “ aromatic monocyclic heterocyclic group ” represented by the ring C is particularly preferably a pyridine ring.
In the formula ( I ), the bonding site of methylene and pyridine ring is not particularly limited.
In these cases, the metal-halogen exchange occurred exclusively at the 5 position of the pyridine ring.
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Examples of using Pyridine
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Typical bases include pyridine and triethylamine
Pyridine is also used as a base in condensation reactions
Related to these are pyridine and its derivatives
Examples of using Ring
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And place a ring upon her hand
Ring tones will not hold up in court
I had to go into the ring to finish it myself
