Direct Access to β-Oxodiazo Compounds by Copper(II)-Catalyzed Oxidative Rearrangement of Stabilized Vinyl Diazo Derivatives
作者:José Barluenga、Giacomo Lonzi、Lorena Riesgo、Miguel Tomás、Luis A. López
DOI:10.1021/ja208965b
日期:2011.11.16
The copper(II)-catalyzed reaction of alkenyldiazo compounds with iodosylbenzene leading to β-oxodiazo derivatives is reported. This process occurs via an unprecedented 1,2-shift of the diazoacetate function. A selection of the synthetic applications of a representative member of this new class of functionalized diazo derivatives in the regioselective synthesis of substituted 1,4-dicarbonyl compounds
报道了烯基重氮化合物与碘代苯在铜 (II) 催化下反应生成 β-氧代重氮衍生物。这个过程是通过重氮乙酸酯功能前所未有的 1,2-转变发生的。还报道了这类新型官能化重氮衍生物的代表性成员在取代 1,4-二羰基化合物的区域选择性合成中的合成应用选择。
Practical Synthesis of Diethyl Phenylsuccinate by Mg-promoted Carboxylation of Ethyl Cinnamate
Mg-promotedreduction of ethyl cinnamate (1a) in the presence of carbon dioxide gave a mixture of β-carboxylated compound 2a and α,β-dicarboxylated compound 3a. Similar reductive carboxylation of 1...
Tetrahydropyranyl protecting group. II. 3-Bromo-2-(tetrahydropyran-2-yloxy)propene, a masked acetonyl bromide
作者:D. E. Horning、G. Kavadias、J. M. Muchowski
DOI:10.1139/v70-160
日期:1970.3.15
It is shown that the sodium hydride (in dimethyl formamide) induced elimination of hydrogen bromide from 1,3-dibromo-2-(tetrahydropyran-2-yloxy)propane (3) can be considered to result in the in situ formation of 3-bromo-2-(tetrahydropyran-2-yloxy)propene (4). When generated in this manner, 4 was shown to function as a masked acetonyl bromide of considerable utility. Under similar conditions, 1,3-d