FR2228767A1 - Nitration of haloaromatic cpds. in presence of phosphorus cpd. - to control ortho: para substn. ratio, pref. using sulphuric acid - Google Patents

Nitration of haloaromatic cpds. in presence of phosphorus cpd. - to control ortho: para substn. ratio, pref. using sulphuric acid

Info

Publication number
FR2228767A1
FR2228767A1 FR7415926A FR7415926A FR2228767A1 FR 2228767 A1 FR2228767 A1 FR 2228767A1 FR 7415926 A FR7415926 A FR 7415926A FR 7415926 A FR7415926 A FR 7415926A FR 2228767 A1 FR2228767 A1 FR 2228767A1
Authority
FR
France
Prior art keywords
cpd
pref
cpds
ortho
haloaromatic
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.)
Granted
Application number
FR7415926A
Other languages
French (fr)
Other versions
FR2228767B1 (en
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.)
Monsanto Co
Original Assignee
Monsanto Co
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
Priority claimed from US358366A external-priority patent/US3864027A/en
Application filed by Monsanto Co filed Critical Monsanto Co
Publication of FR2228767A1 publication Critical patent/FR2228767A1/en
Application granted granted Critical
Publication of FR2228767B1 publication Critical patent/FR2228767B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/08—Preparation of nitro compounds by substitution of hydrogen atoms by nitro groups

Abstract

Nitro-halo-aromatic cpds. are prepd. by treating a halo-aromatic cpd. with a nitrating agent in the presence of a P cpd. The haloaromatic cpd. is pref. a monohalobenzene, e.g. monochlorobenzene or the corresp. Br, I or F derivs., halonaphthalenes, e.g. Cl-, Br- or I-naphthalenes, dihalo-benzenes, e.g. di Cl- di Br-, Cl Br-, di F- benzenes. Suitable P cpds. are phosphoric and phosphorus acids and phosphoric esters, being added to produce an ortho-orientation effect. The halo-cpd. is pref. treated with conc. HNO3 at 0-130 degrees C in the presence of phosphoric acid opt. with H2SO4, esp. at 50-125 degrees C. Other suitable nitration agents are NO, N2O4 and ethyl nitrate. Prods. are valuable inters in prodn. of dyes, photographic developers and antioxidants and stabilisers for rubber. Improved yields are obtd. with controlled distribution of ortho:para ratio.
FR7415926A 1973-05-08 1974-05-08 Nitration of haloaromatic cpds. in presence of phosphorus cpd. - to control ortho: para substn. ratio, pref. using sulphuric acid Granted FR2228767A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US358366A US3864027A (en) 1972-05-10 1973-05-08 Telephoto lens system having small overall length

Publications (2)

Publication Number Publication Date
FR2228767A1 true FR2228767A1 (en) 1974-12-06
FR2228767B1 FR2228767B1 (en) 1977-10-21

Family

ID=23409381

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7415926A Granted FR2228767A1 (en) 1973-05-08 1974-05-08 Nitration of haloaromatic cpds. in presence of phosphorus cpd. - to control ortho: para substn. ratio, pref. using sulphuric acid

Country Status (1)

Country Link
FR (1) FR2228767A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517299A1 (en) * 1981-12-01 1983-06-03 Mitsui Toatsu Chemicals PROCESS FOR THE PREPARATION OF MONONITROCHLOROBENZENE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517299A1 (en) * 1981-12-01 1983-06-03 Mitsui Toatsu Chemicals PROCESS FOR THE PREPARATION OF MONONITROCHLOROBENZENE

Also Published As

Publication number Publication date
FR2228767B1 (en) 1977-10-21

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