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    PRODUCTION OF HALOGEN-SUBSTITUTED ETHER COMPOUND
    162.
    发明专利
    PRODUCTION OF HALOGEN-SUBSTITUTED ETHER COMPOUND 失效

    公开(公告)号：JPS60136530A

    公开(公告)日：1985-07-20

    申请号：JP24215583

    申请日：1983-12-23

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： ITOU HIROSHI ,  NITSUTA ATSUHIKO ,  TANAKA TOMIO

    IPC: C07C41/01 ,  C07C41/00 ,  C07C41/16 ,  C07C43/12 ,  C07C43/17 ,  C07C43/192 ,  C07C43/225 ,  C07C67/00 ,  C07C201/00 ,  C07C201/14 ,  C07C205/37 ,  C07C205/38

    Abstract: PURPOSE:To produce a variety of the titled compounds in the same reactor, in one step, efficiently and economically, by using an OH-substituted compound as a raw material, and reacting with a dihalogen-substituted compound in the presence of a suspension of a strongly basic substance. CONSTITUTION:The reaction of an OH-substituted compound such as n-butyl alcohol with a dihalogen-substituted compound of formula (X is halogen; n is 3-20) is started in an aprotic polar solvent in the presence of a suspension of a strongly basic substance such as NaOH flakes, etc., at -20-+100 deg.C. The objective compound such as 1-bromo-4-n-butoxybutane, etc. can be produced by the reaction within 20hr. The OH-substituted compound is a compound having aliphatic hydrocarbon group, carbon ring or heterocyclic group substituted with OH group. EFFECT:Suitable for the production of a variety of products in small quantities. USE:When the objective compound is bonded with a functional group, it is useful as an intermediate raw material to introduce said functional group to an amide compound, an amine, an OH-substituted compound, etc.

    Bromination
    170.
    发明授权
    Bromination 失效
    烧伤

    公开(公告)号：US5092971A

    公开(公告)日：1992-03-03

    申请号：US326109

    申请日：1989-03-20

    Applicant: Philip J. Turner ,  Martin Jeff

    Inventor： Philip J. Turner ,  Martin Jeff

    IPC: B01J19/12 ,  C07B39/00 ,  C07C17/00 ,  C07C17/14 ,  C07C22/04 ,  C07C25/02 ,  C07C25/13 ,  C07C67/00 ,  C07C201/00 ,  C07C201/12 ,  C07C201/14 ,  C07C205/11 ,  C07C205/12 ,  C07C303/22 ,  C07C309/30

    CPC classification number: C07B39/00 ,  C07C201/12

    Abstract: Selective bromination of alkylarenes to the alpha monobrominated derivative is desirable as a precursor for the selective production of, for example, the corresponding alcohols. The product can be obtained by a photolytic reaction between the substrate, hydrogen peroxide and hydrogen bromide in approximately equimolar ratios in an organic solvent, but improvement in the yield of the product coupled with similar or improved selectivity in its production was either not achieved or was actually impaired by a range of variations in the ratios and by omitting the solvent.The invention employs mole ratios of H.sub.2 O.sub.2 :substrate of 0.1:1 to 0.4:1, preferably 0.2:1 to 0.33:1 and of H.sub.2 O.sub.2 :bromide of 1:1.2 to 1:2, preferably about 1:1.3 to 1:1.8 and progressive introduction of the H.sub.2 O.sub.2, either in the presence or absence of the solvent, while irradiating with light preferably having principal emissions in the range of 250 to 600 nm, and the process thereby achieves either or both of improved yield and improved selectivity of the alpha monobrominated product. The reaction mixture is preferably maintained at 50.degree. to 70.degree. C. The process is especially suitable for deactivated alkylarenes, such as o-nitrotoluene.

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