頁籤選單縮合
題 名 | Palladium-Catalyzed Chemoselective Intramolecular Cyclization of 2-Bromoaryl Alkenenitriles |
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作 者 | 鄧瑞惠; 戴火木; 楊朝成; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 47:2 2000.04[民89.04] |
頁 次 | 頁327-341 |
分類號 | 346 |
關鍵詞 | Palladium-catalyzed; Intramolecular cyclization; Alkenenitriles; |
語 文 | 英文(English) |
英文摘要 | The chemoselectivity in the palladium-catalyzed intramolecular cyclization of 2-(o-bromoaryl)-alkenenitriles depends on the nature of ���{substitutents. 2-(o-Bromoanilino)alkenenitriles attacked the cyano group, followed by the cyano group transposition and hydrolysis, to give o-(methylamino)benzonitrile. 2-(o-Bromobenzyl)alkenenitriles, 2-(o-bromophenylthio)alkenenitriles and 2-(o-bromophenoxy)-alkenenitriles attacked the olefinic double bonds and led to 1-vinyl-2-indancecarbonitrile, 1,2,3,4-tetrahydronaphthalene-2-carbonitriles, 3,4-dihydro-2H-benzo[b]thiine-2-carbonitriles, and 3,4-dihydro-2H-benzo[b]oxine-2-carbonitriles. A general mechanism for the palladium-catalyzed arylations is proposed. |
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