GB1393428A - Process for the preparation of 4-chloro-2,5-dimethoxyaniline - Google Patents

Process for the preparation of 4-chloro-2,5-dimethoxyaniline

Info

Publication number
GB1393428A
GB1393428A GB5151772A GB5151772A GB1393428A GB 1393428 A GB1393428 A GB 1393428A GB 5151772 A GB5151772 A GB 5151772A GB 5151772 A GB5151772 A GB 5151772A GB 1393428 A GB1393428 A GB 1393428A
Authority
GB
United Kingdom
Prior art keywords
chloro
dimethoxy
nov
platinum
mol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5151772A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of GB1393428A publication Critical patent/GB1393428A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
    • C07C213/02—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions involving the formation of amino groups from compounds containing hydroxy groups or etherified or esterified hydroxy groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/42—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/18—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/20—Sulfiding

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Catalysts (AREA)

Abstract

1393428 4-chloro-2,5-dimethoxy aniline HOECHST AG 8 Nov 1972 [11 Nov 1971] 51517/72 Heading C2C The invention comprises a process for the manufacture of 4-chloro-2,5-dimethoxy-aniline wherein 4-chloro-2,5-dimethoxy-1-nitrobenzene is catalytically reduced in an aqueous reaction medium with addition of an aromatic solvent at a temperature within the range of from 80 to 100‹ C. at a pressure of from 5 to 50 atmospheres gauge in the presence of a sulphidized or sulphitized platinum-on-carbon catalyst and adding catalytic amounts of from 0À01 to 0À2 mol. (calculated on 1 mol. of nitro compound) of a buffer substance which produces a pH value of from 8 to 10 in aqueous solution. Examples of the buffer substance are disodium diborate, sodium tetraborate, sodium formate, sodium acetate and disodium hydrogen phosphate. The catalyst is used advantageously in a weight ratio of nitro compound to platinum in the range of from 10,000: 1 to 1000: 1.
GB5151772A 1971-11-11 1972-11-08 Process for the preparation of 4-chloro-2,5-dimethoxyaniline Expired GB1393428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2156051A DE2156051C3 (en) 1971-11-11 1971-11-11 Process for the preparation of 4-chloro-2,5-dimethoxy-aniline

Publications (1)

Publication Number Publication Date
GB1393428A true GB1393428A (en) 1975-05-07

Family

ID=5824830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5151772A Expired GB1393428A (en) 1971-11-11 1972-11-08 Process for the preparation of 4-chloro-2,5-dimethoxyaniline

Country Status (20)

Country Link
JP (1) JPS5644060B2 (en)
AT (1) AT331210B (en)
AU (1) AU474209B2 (en)
BE (1) BE791300A (en)
CA (1) CA995248A (en)
CH (1) CH575377A5 (en)
CS (1) CS173610B2 (en)
DD (1) DD99356A5 (en)
DE (1) DE2156051C3 (en)
ES (1) ES408273A1 (en)
FR (1) FR2160166A5 (en)
GB (1) GB1393428A (en)
HU (1) HU165205B (en)
IL (1) IL40777A (en)
IT (1) IT970356B (en)
NL (1) NL7214964A (en)
PL (1) PL85137B1 (en)
RO (1) RO62342A (en)
SU (1) SU474135A3 (en)
ZA (1) ZA727738B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5041671A (en) * 1988-06-22 1991-08-20 Hoechst Aktiengesellschaft Process for the preparation 4-chloro-2,5-dimethoxy-aniline

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455704C3 (en) * 1974-11-25 1978-06-08 Hoechst Ag, 6000 Frankfurt Process for the preparation of 4-chloro-23-dimethoxy aniline
CA1148562A (en) * 1979-02-22 1983-06-21 Alfred J. Bird Catalyst for the hydrogenation of halogen substituted aromatic nitro compounds
JPS5814756U (en) * 1981-07-21 1983-01-29 東京シ−ト株式会社 Headrest mounting device
JPS58159957U (en) * 1982-04-19 1983-10-25 日本発条株式会社 Headrest upper and lower adjustment mechanism
JPH0226367Y2 (en) * 1984-09-20 1990-07-18
US8387827B2 (en) 2008-03-24 2013-03-05 S.C. Johnson & Son, Inc. Volatile material dispenser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5041671A (en) * 1988-06-22 1991-08-20 Hoechst Aktiengesellschaft Process for the preparation 4-chloro-2,5-dimethoxy-aniline

Also Published As

Publication number Publication date
AU474209B2 (en) 1976-07-15
CH575377A5 (en) 1976-05-14
CA995248A (en) 1976-08-17
ES408273A1 (en) 1975-11-16
SU474135A3 (en) 1975-06-14
HU165205B (en) 1974-07-27
FR2160166A5 (en) 1973-06-22
DE2156051A1 (en) 1973-05-17
ATA952372A (en) 1975-11-15
PL85137B1 (en) 1976-04-30
DE2156051B2 (en) 1974-03-28
BE791300A (en) 1973-05-14
IL40777A (en) 1976-04-30
JPS4857938A (en) 1973-08-14
RO62342A (en) 1977-08-15
JPS5644060B2 (en) 1981-10-16
IL40777A0 (en) 1973-01-30
DD99356A5 (en) 1973-08-05
IT970356B (en) 1974-04-10
CS173610B2 (en) 1977-02-28
ZA727738B (en) 1973-09-26
AT331210B (en) 1976-08-10
DE2156051C3 (en) 1974-10-31
AU4858372A (en) 1974-05-09
NL7214964A (en) 1973-05-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years