The Meerwein arylation is an organic reaction involving the addition of an aryl diazonium salt (ArN2X) to an electron-poor alkene usually supported by a metal salt. The reaction product is an alkylated arene compound. The reaction is named after Hans Meerwein, one of its inventors who first published it in 1939. In a general scope a Meerwein arylation is any reaction between an aryl radical and an alkene. The initial intermediate is an aryl enthenyl radical which can react with many trapping reagents such as hydrogen or halogens or with those based on nitrogen or sulfur.
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| - Meerwein-Arylierung (de)
- Meerwein arylation (en)
- Реакція Меєрвейна (uk)
- Meerwein芳基化反应 (zh)
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| - Die Meerwein-Arylierung – auch Meerwein-Reaktion genannt – ist eine Namensreaktion der organischen Chemie, die auf den deutschen Chemiker Hans Meerwein (1879–1965) zurückgeht. Die Reaktion wurde erstmals 1939 veröffentlicht. (de)
- Meerwein芳基化反应（Meerwein arylation），由 Hans Meerwein 在1939年报道。 芳基重氮盐在金属盐类存在下对缺电子烯烃的加成反应。产物为取代芳香族化合物。 烯烃上的吸电子基团降低了烯烃双键的电子密度。 (zh)
- Реакцiя Меєрвейна (англ. Meerwein reaction) — конденсацiя α,β-ненасичених карбонiльних сполук зi солями арилдіазонiю (каталiзується солями мiдi), яку ведуть у водi або органiчних розчинниках, що змішуються з водою (пр., ацетон, пiридин). RCH=CHR' + ArN2X → RCH=C(Ar)CR' (або R(Ar)C=CHR') Інше спрямування реакції — галогенарилювання по кратних зв'язках. RCH=CHR' + ArN2X → RCHX–C(Ar)CR' (або R(Ar)C–CHR') (uk)
- The Meerwein arylation is an organic reaction involving the addition of an aryl diazonium salt (ArN2X) to an electron-poor alkene usually supported by a metal salt. The reaction product is an alkylated arene compound. The reaction is named after Hans Meerwein, one of its inventors who first published it in 1939. In a general scope a Meerwein arylation is any reaction between an aryl radical and an alkene. The initial intermediate is an aryl enthenyl radical which can react with many trapping reagents such as hydrogen or halogens or with those based on nitrogen or sulfur. (en)
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| - Die Meerwein-Arylierung – auch Meerwein-Reaktion genannt – ist eine Namensreaktion der organischen Chemie, die auf den deutschen Chemiker Hans Meerwein (1879–1965) zurückgeht. Die Reaktion wurde erstmals 1939 veröffentlicht. (de)
- The Meerwein arylation is an organic reaction involving the addition of an aryl diazonium salt (ArN2X) to an electron-poor alkene usually supported by a metal salt. The reaction product is an alkylated arene compound. The reaction is named after Hans Meerwein, one of its inventors who first published it in 1939. An electron-withdrawing group (EWG) on the alkene makes it electron deficient and although the reaction mechanism is unclear, involvement of an aryl radical is presumed after loss of nitrogen in the diazonium salt followed by a free radical addition. In the primary reaction product the intermediate alkyl radical is then captured by the diazonium counterion X which is usually a halogen or a tetrafluoroborate. In a subsequent step an elimination reaction liberates HX (for instance hydrochloric acid) and an aryl vinyl compound is formed. The reaction mechanism from the arene's view ranks as a radical-nucleophilic aromatic substitution. In a general scope a Meerwein arylation is any reaction between an aryl radical and an alkene. The initial intermediate is an aryl enthenyl radical which can react with many trapping reagents such as hydrogen or halogens or with those based on nitrogen or sulfur. (en)
- Meerwein芳基化反应（Meerwein arylation），由 Hans Meerwein 在1939年报道。 芳基重氮盐在金属盐类存在下对缺电子烯烃的加成反应。产物为取代芳香族化合物。 烯烃上的吸电子基团降低了烯烃双键的电子密度。 (zh)
- Реакцiя Меєрвейна (англ. Meerwein reaction) — конденсацiя α,β-ненасичених карбонiльних сполук зi солями арилдіазонiю (каталiзується солями мiдi), яку ведуть у водi або органiчних розчинниках, що змішуються з водою (пр., ацетон, пiридин). RCH=CHR' + ArN2X → RCH=C(Ar)CR' (або R(Ar)C=CHR') Інше спрямування реакції — галогенарилювання по кратних зв'язках. RCH=CHR' + ArN2X → RCHX–C(Ar)CR' (або R(Ar)C–CHR') (uk)
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