US3920739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aromatic diamines
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1973-07-11
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Granted: 1975-11-18
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Expires: 1993-07-11
Abstract
Abstract wherein R1 is hydrogen atom or a straight or branched C1 - C6 alkyl group, R4 and R5 are each a C1 - C6 alkyl group unsubstituted or substituted by hydroxy group, a lower alkoxy group or a sulfonylamide group, and X is hydrogen atom, chlorine atom, bromine atom, a lower alkyl group or a lower alkoxy group, which is useful as intermediate for the production of dyes, pigments, medicines and pesticides, as well as a developing agent for a color photograph. A process for the preparation of a diamino compound of the formula (I),
Inventors
- 👤 Hideaki Suda
- 👤 Tatsuo Kanda
- 👤 Hiroshige Tomita
- 👤 Hirotoshi Nakanishi
- 👤 Hiromu Hida
- 👤 Tatsumi Nuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:10
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/4136
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
13 words
A PROCESS FOR THE PREPARATION OF A DIAMINO COMPOUND OF THE FORMULA (1).
Claim 2
Dependent Claim
13 words
A PROCESS FOR THE PREPARATION OF A DIAMINO COMPOUND OF THE FORMULA (1).
Claim 3
Dependent Claim
13 words
A process for the preparation of a diamino compound of the formula (I),
Claim 4
Dependent Claim
13 words
A process for the preparation of a diamino compound of the formula (I),
Claim 5
Dependent Claim
13 words
A process for the preparation of a diamino compound of the formula (I),
Claim 6
Dependent Claim
13 words
A process for the preparation of a diamino compound of the formula (I),
Claim 7
Dependent Claim
15 words
The process accordng to claim 1, wherein a nitroamine compound having a B-C1-C3 alkylsulfonylamidoethyl group.
Claim 8
Dependent Claim
31 words
The process according to claim 1, wherein a nitroamine compound having a C1-C3-alkylsulfonylamido-C1-C6 alkyl group as R5 in formula (II), is prepared by reacting a nitro compound of the formula (III''),
Claim 9
Dependent Claim
22 words
The process according to claim 1, wherein the reduction is carried out in the presence of an activated metal catalyst with hydrogen.
Claim 10
Dependent Claim
30 words
The process according to claim 6, wherein the activated metal catalyst is Raney nickel, stabilized Raney nickel, platinum or palladium which may be supported on a carrier, or copper chromate.
Claim 11
Dependent Claim
38 words
The process according to claim 1, wherein the reduction is carried out at a temperature within a range of from room temperature to 200*C. under a pressure within a range of from an atmospheric pressure to 100 kg./cm2.
Claim 12
Dependent Claim
40 words
The process according to claim 1, wherein the reaction between the nitroether compound (IV) and ammonia or the aliphatic primary amine is carried out at a temperature of 50* to 250*C. under a pressure of atmospheric pressure to 100 kg./cm2.
Claim 13
Dependent Claim
29 words
The process according to claim 1, wherein the alkylation is carried out at a temperature of 50 to 200 C. under a pressure of atmospheric pressure to 10 kg./cm2.
Claim 14
Dependent Claim
38 words
The process according to claim 2, wherein the reaction between the nitroether compound (IV) and the aliphatic secondary amine is carried out at a temperature of 30* to 300*C. under a pressure of atmospheric pressure to 100 kg./cm2.
Claim 15
Dependent Claim
28 words
The process according to claim 3, wherein the chloride is methyl chloride, ethyl chloride, n- or isopropyl chloride, n-, sec- or tert.-butyl chloride, n-hexyl chloride or benzyl chloride.
Claim 16
Dependent Claim
36 words
The process according to claim 3, wherein the reaction between the nitrophenol compound (V) and the chloride is carried out at a temperature of 50* to 250*C. under a pressure of atmospheric pressure to 20 kg./cm2.
Claim 17
Dependent Claim
22 words
The process according to claim 2, wherein the reduction is carried out in the presence of an activated metal catalyst with hydrogen.
Claim 18
Dependent Claim
22 words
The process according to claim 3, wherein the reduction is carried out in the presence of an activated metal catalyst with hydrogen.
Claim 19
Dependent Claim
38 words
The process according to claim 2, wherein the reduction is carried out at a temperature within a range of from room temperature to 200*C. under a pressure within a range of from an atmospheric pressure to 100 kg./cm2.
Claim 20
Dependent Claim
38 words
The process according to claim 3, wherein the reduction is carried out at a temperature within a range of from room temperature to 200*C. under a pressure within a range of from an atmospheric pressure to 100 kg./cm2.
Claim 21
Dependent Claim
40 words
The process according to claim 3, wherein the reaction between the nitroether compound (IV) and ammonia or the aliphatic primary amine is carried out at a temperature of 50* to 250*C. under a pressure of atmospheric pressure to 100 kg./cm2.
Claim 22
Dependent Claim
28 words
The process according to claim 3, wherein the alkylation is carried out at a temperature of 50* to 200*C. under a pressure of atmospheric pressure to 10 kg./cm2.
Claim 23
Dependent Claim
38 words
The process according to claim 3, wherein the reaction between the nitroether compund (IV) and the aliphatic secondary amine is carried out at a temperature of 30* to 300*C. under a pressure of atmospheric pressure to 100 kg./cm2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |