2-cyanocyclopropane-1,1-dicarboxylate de diethyle;diethyl 2-cyanocyclopropane-1,1-dicarboxylate;2-cyano-1,1-bis(ethoxycarbonyl)cyclopropane;1-cyano-2,2-diethoxycarbonylcyclopropane;(+/-)-2-Cyan-cyclopropan-1,1-dicarbonsaeure-diaethylester;1.1-Diethoxycarbonyl-2-cyan-cyclopropan;Diethyl 2-cyano-1,1-cyclopropanedicarboxylate
A New Synthetic Route to Electrophilic Cyclopropane Derivatives from Olefins
作者:Nariyoshi Kawabata、Shinji Yano、Jiro Hashimoto、Jun-ichi Yoshida
DOI:10.1246/bcsj.54.2539
日期:1981.8
1-Bis(alkoxycarbonyl)-, 1-alkoxycarbonyl-1-cyano-, and 1,1-dicyanocyclopropane derivatives were obtained in 10–99% yields by the reaction of Br2C(COOR)2, Br2C(CN)(COOR), and KBr[Br2C(CN)2]4, respectively, with olefins and Cu2Br2 in dimethyl sulfoxide (DMSO).
Dibutyl telluride assists cyclopropanation of α,β-unsaturated ketone, ester, and nitrile with dibromomalonic esters without solvent at room temperature. In addition, it effects alkylidenation of aldehydes including α,β-unsaturated aldehyde with the same reagent.
Abstract Cyclopropane were obtained from electron deficient olefins and acid carbon compounds by oxidation by iodine in the presence of KF on alumina. The reaction allows the synthesis of cyclopropanediyldiphosphonates.
Copper(II) Halide Catalyzed Cyclopropanation of Olefins Involving Dehydrobromination of Bromomalonic Ester by Amine
作者:Nariyoshi Kawabata、Shinji Yanao、Jun-ichi Yoshida
DOI:10.1246/bcsj.55.2687
日期:1982.8
The reaction of olefins with bromomalonic ester and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) proceeded in the presence of a catalytic amount of copper(II) halide to give 1,1-bis(alkoxycarbonyl)cyclopropane derivatives. DBU was converted into DBU-hydrobromide during the reaction. The reaction was electrophilic and proceeded nonstereospecifically.
烯烃与溴丙二酸酯和 1,8-二氮杂双环 [5.4.0] 十一碳-7-烯 (DBU) 的反应在催化量的卤化铜 (II) 存在下进行,得到 1,1-双(烷氧基羰基)环丙烷衍生物。DBU在反应过程中转化为DBU-氢溴酸盐。该反应是亲电子的并且非立体定向地进行。
Synthesis of gem-dialkoxycarbonylcyclopropane derivatives from olefins by the reaction with dibromomalonic esters and copper in dimethyl sulphoxide
作者:Nariyoshi Kawabata、Masami Tanimoto
DOI:10.1016/0040-4020(80)88047-1
日期:1980.1
A novel method for the synthesis of gem-dialkoxycarbonylcyclopropane derivatives is reported which involves the reaction of olefins with dibromomalonic esters and Cu in dimethyl sulphoxide. The reaction was applicable to a wide range of olefins and proceeded smoothly at moderate temperature to give the cyclopropane derivatives often in good yields. Cu was converted to Cu(II) bromide during the reaction