GB689430A - Improvements in or relating to the preparation of 2:4:5-trichlorbenzylchloride - Google Patents

Improvements in or relating to the preparation of 2:4:5-trichlorbenzylchloride

Info

Publication number
GB689430A
GB689430A GB8677/51A GB867751A GB689430A GB 689430 A GB689430 A GB 689430A GB 8677/51 A GB8677/51 A GB 8677/51A GB 867751 A GB867751 A GB 867751A GB 689430 A GB689430 A GB 689430A
Authority
GB
United Kingdom
Prior art keywords
chloromethyl
sulphuric acid
chloromethyl ether
acid
excess
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
GB8677/51A
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.)
ILSE LIEBRECHT
JULIUS LIEBRECHT
Original Assignee
ILSE LIEBRECHT
JULIUS LIEBRECHT
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 ILSE LIEBRECHT, JULIUS LIEBRECHT filed Critical ILSE LIEBRECHT
Publication of GB689430A publication Critical patent/GB689430A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
    • C07C17/32—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by introduction of halogenated alkyl groups into ring compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

2,4,5 - Trichlorobenzylchloride is prepared by reacting 1,2,4-trichlorobenzene in a molecular excess of fuming sulphuric acid with chloromethyl ether at a temperature not substantially exceeding the boiling-point of chloromethyl ether (c.a. 59 DEG C.), e.g. within the range of from -5 DEG to 20 DEG C., or from -20 DEG to 40 DEG C. The acid may be used in a 2 to 10 fold excess over the molar proportion, but it is preferred to use an excess of from 5 to 7 mols. over the molar proportion. One example is given. The Specification also refers to the introduction of the chloromethyl group into aromatic compounds by means of chloromethyl ether and stannous chloride, or by means of formaldehyde and concentrated hydrochloric acid. Aromatic hydrocarbons containing negative substituents may be reacted with sulphuric acid, sodium chloride and paraformaldehyde or trioxymethylene to introduce chloromethyl groups. A chloromethyl group is introduced into 4-nitrotoluene with bis-chloromethyl ether and fuming sulphuric acid.
GB8677/51A 1950-04-20 1951-04-13 Improvements in or relating to the preparation of 2:4:5-trichlorbenzylchloride Expired GB689430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE689430X 1950-04-20

Publications (1)

Publication Number Publication Date
GB689430A true GB689430A (en) 1953-03-25

Family

ID=6598702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8677/51A Expired GB689430A (en) 1950-04-20 1951-04-13 Improvements in or relating to the preparation of 2:4:5-trichlorbenzylchloride

Country Status (1)

Country Link
GB (1) GB689430A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369728A1 (en) * 1988-11-14 1990-05-23 Ethyl Corporation Haloalkylation of aromatic compounds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369728A1 (en) * 1988-11-14 1990-05-23 Ethyl Corporation Haloalkylation of aromatic compounds

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