Examples of 'chromene' in a sentence
Meaning of "chromene"
Chromene is a chemical compound belonging to the group of compounds known as benzo-fused heterocycles. It is commonly found in various natural products and pharmaceuticals
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- Synonym of 1-benzopyran
How to use "chromene" in a sentence
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chromene
The chromene compound has a chromene skeleton.
In the experimental examples a chromene is also used.
This chromene compound exhibits a largefading rate.
Illustrative examples of the chromene compound are given below.
Chromene compound and articles comprising the same.
The following chromene compounds were used.
The preferred photochromic compounds are spirroxazine and chromene compounds.
Preferred chromene compounds of the present invention are exemplified below.
These fulgide compounds and chromene compounds are well known.
Such chromene compounds can be shown by the following general formula.
A photochromic lens containing a chromene compound according to any preceding claim.
The chromene compound of the present invention exhibits an excellent effect.
A photochromic optical or other material comprising a chromene compound of any preceding claim.
The following chromene compounds are particularly preferably used in this invention.
The ratio is determined for each combination of a chromene compound and an aromatic compound.
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The crude chromene was purified by chromatography on silica gel with dichloromethane.
The photochromic component may also comprise a further photochromic compound such as a chromene compound.
The chromene compound of the present invention can be synthesized by a variety of methods.
It was thus found that they were chromene compounds which rarely experienced initial coloration.
A chromene compound and a spirooxazine compound have also been known as photochromic compounds.
The present invention relates to novel chromene compounds and the use of the chromene compounds.
The chromene compound of the present invention may be produced by any synthesis process.
The invention further provides a photochromic material containing the above chromene compound of the present invention.
The present invention relates to chromene derivatives having an antihypertensive and antiarrythmic activity.
Chromene compound obtained in Example.
Particularly preferred examples of the chromene compound in the present invention include the following compounds.
The chromene compound having specific substituents introduced into the specific positions has been unknown.
In this situation, the chromene derivative is prochiral.
The chromene compound of the present invention has high durability when Y is a sulfur atom.
A photochromic material containing a chromene compound of claim 1.
The chromene compound of the present invention has little initial coloration when X is a sulfur atom.
A photochromic material containing a chromene compound of any one of claims 1 to 3.
Chromene derivatives substituted by alkoxide as inhibitors of the TCR-Nck interaction.
Concrete examples of the most preferred chromene compounds are as follows,.
That is, the chromene compound usually develops orange to yellowish color tone.
A photochromic polymerizable composition containing a chromene compound of claim 1 and a polymerizable monomer.
The chromene compound of the invention exhibits, by itself, excellent photochromic properties.
Therefore, it was found that the chromene compounds rarely experienced initial coloration.
Examples of the photochromic compound include fulgide, fulgimide, spirooxazine and chromene.
Any known compound having a chromene skeleton and photochromism may be used as the chromene compound.
Third, the method is effective with a wide variety of substituted chromene derivatives.
Chromene compounds, a process for their preparation and pharmaceutical compositions containing them.
According to the present invention, the chromane or chromene derivative is advantageously a flavonoid.
In such a case, a chromene compound can be favorably used as the other photochromic compound.
The term " initial coloration " is connected with two properties of the chromene compound.
Therefore, this chromene compound has room for the improvement of this point.
The central bicyclic ring system of the compound of formula ( IIIb ) is a chromene ring.
However, a chromene compound with a relatively slow color fading speed is particularly suitably used.
A photochromic polymerizable composition containing a chromene compound of any one of claims 1 to 3 and a polymerizable monomer.
Known examples of the photochromic compound are fulgimide compound, spirooxazine compound and chromene compound.
