 High molecular weight colloids which control bleed |
| What Is claimed Is: 1. A process for controlling color bleed in inks employed in thermal ink-jet ... |
|
| Reusable hidden indicia printed sheet |
| I claim: 1. A reusable hidden indicia printed sheet comprising a paper containing a first color-... |
|
| Smoking compositions containing a flavorant-release additive |
| What is claimed is: 1. A smoking composition comprising an admixture of (1) combustible filler ... |
|
| Thermally developable light-sensitive layers containing photobleachable sensitizers |
| OF THE INVENTION Thermally developable imaging systems described in U.S. Pat. Nos. 4,460,677 and 4,... |
|
| Chromatographic stationary supports |
| This invention therefore relates to a polyhydroxylated material comprising an organic or inorganic ... |
|
| Aqueous ink jet inks containing ester diol and amide diol cosolvents |
| OF THE INVENTION The invention relates to an ink jet ink composition which is particularly suited ... |
|
| Sulfur-containing penetrants for ink jet inks |
| OF THE INVENTION The invention relates to aqueous ink jet ink compositions which are particularly ... |
|
| Nitrogen-containing organic cosolvents for aqueous ink jet inks |
| OF THE INVENTION The ink jet ink compositions of this invention are particularly suited for use in ... |
|
| Reusable facsimile transmittal sheet and method |
| OF AN EMBODIMENT OF THE INVENTION Referring to the drawing the present reusable facsimile ... |
|
| Light- and heat-sensitive composition, and recording material |
| OF THE INVENTION The term "photo-hardenable composition" as used herein means a photo-hardenable ... |
|
|
Chalcone derivatives and process for producing the same
| Details |
Inventors: Takagaki, Hidetsugu; Nakanishi, Shigenori; Abe, Masayoshi; Ohki, Hiromi; Sano, Yoshiyuki;
Assignee: Dainippon Ink and Chemicals, Inc. (Tokyo, JP)
Primary Examiner: Chan; Nicky
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt
Chalcone derivatives having at least one tetrahydropyranyloxy group is disclosed. Typically, the compounds are represented by general formula (I) ##STR1## wherein X and X' each represent a tetrahydropyranyl group, R and R', which are then same or different, each represent an alkyl group or a hydrogen atom, n and n' each are an integer of from 0 to 5, m and m' each are integers of from 0 to 5, provided that n+n' is 1 or more, and that n+m is an integer of from 0 to 5 and n'+m' is an integer of from 0 to 5. Also, disclosed are processes for producing the chalcone derivatives starting from acetophenone or its derivative and benzaldehyde or its derivative at least one of which has at least one tetrahydropyranyloxy group. Further, disclosed is 2,3,4,2',4'-pentahydroxychalcone. |
|
DETAILED DESCRIPTION OF THE INVENTION The novel chalcone derivatives having at least one tetrahydropyranyloxy group which the present invention provides, for example, those compounds in which at least one hydroxyl group in the hydroxychalcone is substituted with a tetrahydropyranyloxy group, include compounds represented by general formula (I) below.
##STR3## wherein X and X' each represent a tetrahydropyranyl group, R and R', which are the same or different, each represent an alkyl group or a hydrogen atom, n and n' each are an integer of from 0 to 5, m and m' each are integers of from 0 to 5, provided that n+n' is 1 or more, and that n+m is an integer of from 0 to 5 and n'+m' is an integer of from 0 to 5.
Preferred examples of the chalcone compounds are those in which n, n', m, and m' each are an integer of from 1 to 3, provided that n+m and n'+m' each are an integer of from 1 to 3.
In this case, combinations of n and n' being an integer of from 1 to 3 and m and m' each being 0 may also be possible.
As specific compounds included in the above-described preferred examples, there can be cited, for example, the following compounds.
##STR4## Also, compounds can be used which have a hydroxyl group at the 2-position of acetophenone skeleton and are represented by general formula (II) below.
##STR5## wherein X and X' each represent a tetrahydropyranyl group, R and R', which are the same or different, each represent an alkyl group or a hydrogen atom, n is an integer of from 0 to 2, n' is an integer of from 0 to 3, m is an integer of from 0 to 2, and m' is an integer of from 0 to 3, provided that n+n' is 1 or more, and that n+m is an integer of from 0 to 3 and n'+m' is an integer of from 1 to 3.
Specific compounds embraced by general formula (II) include the following compounds.
##STR6## In the present invention, in order to produce chalcone derivatives having at least one tetrahydropyranyloxy group in the chalcone skeleton, acetophenone having at least one tetrahydropyranyloxy group or its derivative is reacted by Claisen condensation with benzaldehyde or its derivative, or alternatively acetophenone or its derivative is reacted by Claisen condensation with benzaldehyde having at least one tetrahydropyranyloxy group or its derivative
|
| Related patents |
|
|
Recording materials for ink-jet printing
What is claimed is: 1. A recording material for ink jet printing comprising a carrier having a surface which can be printed on or a carrier coated on one side with a ...
|
|
|
Dyeing of polyamide substrates with an organic N-nitroso-hydroxylamine as light stabilizer
We claim: 1. A process for dyeing a polyamide substrate from an aqueous bath with a suitable dye and with a copper complex as light stabilizer for the dyed polyamide, ...
|
|
|
Radiation-sensitive mixture and use thereof
We claim: 1. A radiation-sensitive mixture which is suitable for preparing a polyimide, a polyisoindoloquinazolinedione, a polyoxazinedione, a polyquinazolinedione or a ...
|
|
|
Novel bis-onium salts and the use thereof as photoinitiators
What is claimed is: 1. A composition of matter comprising a material curable by a Bronsted acid, and a bis-sulfonium, -selenonium, -arsonium, -ammonium, or -phosphonium ...
|
|
|
Light-stabilized ink compositions
What is claimed is: 1. A method of stabilizing an ink jet print against the deleterious effects of light which comprises preparing an aqueous solution containing at ...
|
|
|
Inks, particularly for ink printing
What is claimed is: 1. An ink containing as stabilizer at least one compound of formula I ##STR28## in which R.sub.1 and R.sub.2 independently of one another are C.sub.1 ...
|
|
|
Photosensitive elements based on polymeric matrices of diacetylenes and spiropyrans and the use thereof as coatings to prevent document reproduction
These and other objectives are addressed by this invention with a photosensitive member fabricated by crosslinking diacetylene monomers utilizing spiropyrans as ...
|
|
|
Waterfast inks via cyclodextrin inclusion complex
What is claimed is: 1. A liquid ink suitable for ink-jet printing, comprising, by weight: (a) a vehicle comprising about 90 to 98 wt. % water and the balance at least ...
|
|
|
Light-sensitive positive working composition containing a pisolfone compound
What is claimed is: 1. A positive working light-sensitive composition which comprises: (a) 10 to 95% by weight of a compound which has at least one acid-decomposable ...
|
|
|
Light-stabilized ink composition
What is claimed is: 1. A method of stabilizing an ink jet print against the deleterious effects of light which comprises preparing an aqueous solution containing at ...
|
|
|
Quantum Computing 
