Concurrent Anodic Cyanation and Methoxylation of Methylated Furans. Oxidation Potential and Reactivity, and Stereochemical Control of Addition
作者:Kunihisa Yoshida、Takayuki Fueno
DOI:10.1246/bcsj.60.229
日期:1987.1
The potentiostatic electrooxidation of a series of methyl-substituted furans was performed in MeOH that contains NaCN at a Pt anode in a divided cell. In all instances, the 1,4-additions of cyano and/or methoxyl group(s) across the furan ring were achieved. Replacement of an aromatic hydrogen by a cyano group occurred concurrently in some cases. The relative rates of cation radicals toward two different
一系列甲基取代的呋喃的恒电位电氧化在含有 NaCN 的 MeOH 中进行,位于 Pt 阳极的分隔电池中。在所有情况下,都实现了氰基和/或甲氧基在呋喃环上的 1,4-加成。在某些情况下,芳族氢被氰基取代是同时发生的。在电极表面,阳离子自由基对两种不同亲核试剂(CN- 离子和溶剂 MeOH(或 MeO- 离子作为 CN- 离子和溶剂 MeOH 之间的平衡))的相对速率由以下的产率确定产品通过使用竞争反应的速率表达式。呋喃的相对反应性(以对数为单位)与其氧化电位之间存在线性相关性。电氧化形成的立体异构体的比例为 2,