Alkylation of Ketoxime with Dichloromethane Using Bases under Phase-transfer Conditions. Formation of Methylene Dioxime and Novel Heteromacrocyclic Compounds
作者:Takahiro Hosokawa、Toshiyuki Ohta、Yoshihiro Okamoto、Shun-Ichi Murahashi
DOI:10.1246/bcsj.58.194
日期:1985.1
former system the reactivity is supposed to be controlled by nucleophilicity of the oximate anion coordinated to palladium(II). Application of the present reaction to (E,E)-1,2-diketone dioxime such as dimethylglyoxime leads to the formation of novel 21-membered ring heteromacrocyclic compounds in which oxime units are sequentially linked by methylene bridge.
在二氯甲烷中的二-μ-氯双(2-甲基烯丙基)二钯(II)(每钯0.1当量)存在下用KO2(1当量)处理酮肟时,以中等产率得到亚甲基二肟。在相转移催化剂(如 18-crown-6)存在下使用碳酸钾也可以促进酮肟与 CH2Cl2 的这种烷基化反应。对这些反应中一系列酮肟的反应性研究表明,碱夺取质子是后一反应的关键步骤。相比之下,在前一个系统中,反应性应该由与钯 (II) 配位的肟酸阴离子的亲核性控制。本反应对(E,E)-1的应用,