Two directional electroorganic synthesis—electrochemical oxidation and application of a C2-symmetric building block
作者:Marc Zelgert、Martin Nieger、Michael Lennartz、Eberhard Steckhan
DOI:10.1016/s0040-4020(02)00147-3
日期:2002.3
The C2-symmetric building block 1,2:5,6-di-N,O-carbonyl-1,6-diamino-3,4-O-isopropylidene-d-mannitol can be synthesized from d-mannitol in four steps using a nucleophilic substitution with cyanate and a subsequent cyclization in the final key step. The direct electrochemical oxidation of the resulting dioxazolidinone at 40 mA/cm2 in methanol at graphite electrodes with sodium benzene sulfonate as supporting
的c ^ 2 -对称积木1,2:5,6-二- ñ,ö羰基-1,6-二氨基-3,4- ö异亚丙基d甘露醇可以从d-甘露醇在四个步骤来合成在最后的关键步骤中,用氰酸酯进行亲核取代,然后进行环化。在石墨电极上用苯磺酸钠作为支持电解质,在甲醇中在甲醇中以40 mA / cm 2的浓度对二恶唑烷酮进行直接电化学氧化,生成二甲氧基化产物,该产物可用于各种非对映选择性的酰胺基烷基化反应。在所有情况下,观察到双反立体选择性。