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題名 | The Regioselectivity of (Dimethylvinylidene)carbene Directed by Aromatic Ring upon the Addition into Aryl Alkenes in the Presence of Other Olefins= |
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作者 | 許志宏; 閰靜芬; 黃嘉文; |
期刊 | Journal of the Chinese Chemical Society |
出版日期 | 19930200 |
卷期 | 40:1 1993.02[民82.02] |
頁次 | 頁59-65 |
分類號 | 340 |
語文 | eng |
關鍵詞 | |
英文摘要 | Regioselective cycloaddition of (dimethylvinylidene) carbene (1) into aryl alkenes in the presence of other olefins is reported. The reaction is presumably controlled by the phenyl group, which forms an aromatic π -complex with the carbon C-3 orbital, followed by the selective addition of 1 to the closest phenyl-substituted double bond. Also, this selectivity is assumed to be attributed to delocalization of aromatic π electrons, which increases the electron density of the conjugated carbon-carbon double bond, thus leading to the facile addition of vinylidenecarbene. |
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