Synthetic studies on the key component of the new generation of quinolonecarboxylic acid, DU-6859. 2.
作者:Toshifumi Akiba、Osamu Tamura、Masaru Hashimoto、Yuko Kobayashi、Tadashi Katoh、Kazuhiko Nakatani、Masahiro Kamada、Isao Hayakawa、Shiro Terashima
DOI:10.1016/s0040-4020(01)89666-6
日期:1994.3
The title synthesis was achieved by featuring diastereoface-selective cyclopropanation of (4R,5S)-4,5-diphenyl-3-vinyl-2-oxazolidinone and its related compounds, the chiral conformationally rigid N-vinylcarbamates, with zinc-monofluorocarbenoid, followed by hydrogenolysis of the major addition products. The diastereoface-selectivity of the cyclopropanation could be explained by the most stable conformation
通过以(4R,5S)-4,5-二苯基-3-乙烯基-2-恶唑烷酮及其相关化合物的非对映体选择性环丙烷化及其手性构象刚性的N-乙烯基氨基甲酸酯和锌-单氟碳烯基化合物来实现标题合成通过氢解主要的加成产物。环丙烷化的非对映体选择性可以用3-乙烯基-2-恶唑烷酮衍生物的最稳定构象和受到构象受阻较少的表面的攻击来解释。