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公开(公告)号:US06399835B1
公开(公告)日:2002-06-04
申请号:US09543791
申请日:2000-04-06
申请人: Ariel Ewenson , David Itzhak , Miriam Freiberg Bergstein , Asher Shushan , Bertha Croitoru , David Beneish , Naim Faza
发明人: Ariel Ewenson , David Itzhak , Miriam Freiberg Bergstein , Asher Shushan , Bertha Croitoru , David Beneish , Naim Faza
IPC分类号: C07C4561
CPC分类号: C07C201/12 , B01J27/08 , C07B37/04 , C07B39/00 , C07B41/06 , C07C2/70 , C07C41/22 , C07C45/46 , C07C45/63 , C07C2527/08 , C07C2527/138 , C07C2527/173 , Y02P20/582 , C07C49/84 , C07C47/55 , C07C205/12 , C07C43/225
摘要: Processes for the electrophilic substitution of aromatic compounds, such as alkylation, with a desired substituent are disclosed. The processes include contacting the aromatic compound, a precursor of the desired substituent and an aqueous reagent containing zinc halide at elevated temperatures such as above 50° C.
摘要翻译: 公开了芳族化合物的亲电取代,例如烷基化的所需取代基的方法。 这些方法包括使芳族化合物,所需取代基的前体和含有卤化锌的水性试剂在高于50℃的高温下接触。
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公开(公告)号:US5243109A
公开(公告)日:1993-09-07
申请号:US926475
申请日:1992-08-06
申请人: Nurit Kornberg , David Beneish , Michael Peled
发明人: Nurit Kornberg , David Beneish , Michael Peled
摘要: Tribromostyrene (TBS) is produced by the preparation of a TBS precursor, which is .beta.-bromoethyl-tribromobenzene (.beta.-BrBr.sub.3), and the successive elimination of hydrogen bromide from said precursor. The precursor is prepared by selective bromination of phenethyl bromide (.beta.-Br), wherein the molar ratio of bromine to phenethyl bromide is comprised between 2.5 and 3.5, and preferably between 3.1 and 3.3 included; and by adding bromine, after an initial addition, at a controlled molar rate.
摘要翻译: 三溴苯乙烯(TBS)是通过制备TBS前体制备的,其是β-溴乙基 - 三溴苯(β-BrBr 3),以及从所述前体中连续消除溴化氢。 通过选择性溴化苯乙基溴(β-Br)制备前体,其中溴与苯乙基溴的摩尔比在2.5和3.5之间,优选在3.1和3.3之间; 并在初始加入后以受控的摩尔比加入溴。
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