US3917604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of disperse methine dye compounds
Assignee: Novartis Corp
•
Filing: 1973-03-14
•
Granted: 1975-11-04
•
Expires: 1993-03-14
Abstract
Abstract Process for the preparation of a disperse methine dye compound having the formula which comprises contacting a preformed anhydrous solution of an intermediate compound, formed by contacting an amine having the formula H-R or H-R1-R1-H with POCl3 and a di-lower alkylformamide, with an active methylene compound having the formula NC-CH2-R2, preferably in the presence of an acid acceptor, wherein R is a monovalent and R1 is a divalent residue of an aniline, 1,2,3,4-tetrahydroquinoline or benzomorpholine component of a disperse methine dye compound attached to the group -CH C(CN)R2 by an aromatic carbon atom in the position para to the nitrogen atom of the aniline, tetrahydroquinoline and benzomorpholine nucleus; and R2 is cyano, lower alkoxycarbonyl, lower alkanoyl, aroyl, lower akylsulfonyl, arylsulfonyl, carbamoyl, N-lower-alkylcarbamoyl or N,N-di-lower-alkylcarbamoyl.
Inventors
- 👤 Vinton A Hoyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:46
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0008; C09B23/0033; C09B23/0025; C09B23/005; C09B23/0058; C09B23/14; C09B23/143
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
13 words
PROCESS FOR THE PREPARARION OF A DISPERSE METHINE DYE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
PROCESS FOR THE PREPARARION OF A DISPERSE METHINE DYE COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
39 words
Process according to claim 1 wherein the process is carried out in the presence of an acid acceptor at a temperature of 0* to 125*C. and the aniline or tetrahydroquinoline residue of the methine dye compound has the formula
Claim 4
Dependent Claim
36 words
Process according to claim 1 wherein the process is carried out in the presence of an acid acceptor at a temperature of 0* to 125*C. and the methine compound of a -R1-R1- residue having the formula
Claim 5
Dependent Claim
18 words
A process according to claim 1 for the preparation of a disperse methine dye compound having the formula
Claim 6
Dependent Claim
18 words
A process according to claim 1 for the preparation of a disperse methine dye compound having the formula
Claim 7
Dependent Claim
60 words
A process according to claim 5 in which the anhydrous solution of the intermediate compound is added to a solutionslurry of the active methylene compound and the acid acceptor in a water-miscible solvent and the reaction mixture is maintained at a temperature of 20* to 80*C. until essentially all of the intermediate compound has reacted with the active methylene compound.
Claim 8
Dependent Claim
77 words
A process according to claim 6 in which the acid acceptor is sodium or potassium acetate, and the amount of acid acceptor used is at least 4 moles per mole of POCl3 used in the synthesis of the intermediate compound, and the water-miscible solvent is a lower alkanol and in which the methine compound is precipitated by the addition of water to the reaction mixture, is isolated by filtration and is purified by washing with hot water.
Claim 9
Dependent Claim
18 words
A process according to claim 1 for the preparation of a disperse methine dye compound having the formula
Claim 10
Dependent Claim
18 words
A process according to claim 1 for the preparation of a disperse methine dye compound having the formula
Claim 11
Dependent Claim
57 words
A process according to claim 9 in which the anhydrous solution of the intermediate compound is added to a solution-slurry of the active methylene compound and the acid acceptor in a water-miscible solvent and the reaction mixture is maintained at a temperature of 20* to 80*C. until the intermediate compound has reacted with the active methylene compound.
Claim 12
Dependent Claim
77 words
A process according to claim 10 in which the acid acceptor is sodium or potassium acetate, and the amount of acid acceptor used is at least four moles per mole of POCl3 used in the synthesis of the intermediate compound, and the water-miscible solvent is a lower alkanol and in which the methine compound is precipitated by the addition of water to the reaction mixture, is isolated by filtration and is purified by washing with hot water.
Claim 13
Dependent Claim
18 words
A process according to claim 1 for the preparation of a disperse methine dye compound having the formula
Claim 14
Dependent Claim
18 words
A process according to claim 1 for the preparation of a disperse methine dye compound having the formula
Claim 15
Dependent Claim
57 words
A process according to claim 13 in which the anhydrous solution of the intermediate compound is added to a solution-slurry of the active methylene compound and the acid acceptor in a water-miscible solvent and the reaction mixture is maintained at a temperature of 20* to 80*C. until the intermediate compound has reacted with the active methylene compound.
Claim 16
Dependent Claim
77 words
A process according to claim 14 in which the acid acceptor is sodium or potassium acetate, and the amount of acid acceptor used is at least four moles per mole of POCl3 used in the synthesis of the intermediate compound, and the water-miscible solvent is a lower alkanol and in which the methine compound is precipitated by the addition of water to the reaction mixture, is isolated by filtration and is purified by washing with hot water.
References Cited (Backward Citations)
US3240783A
Cited
US3453270A
Cited
US3398152A
Cited
US3453280A
Cited
US3595863A
Cited
US3855215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |