The stereoselective synthesis of cis-3-amino-4-(1-hydroxyalkyl)azetidin-2-ones from L-aspartic acid is described. The thermodynamically less stable isomers with 3, 4-cis stereochemistry, key intermediates for the synthesis of various substitutes monobactams, were obtained by hydrogenation of the 3-oxyimino-azetidin-2-ones prepared from azetidin-2-ones and isoamyl nitrite. Furthermore, some simple analogues of monobactams were synthesized.
描述了从
L-天冬氨酸立体选择性合成顺-3-
氨基-4-(1-羟烷基)氮杂
环丁烷-2-酮。由氮杂
环丁烷-2-酮和
亚硝酸异戊酯制备的3-氧亚
氨基-氮杂
环丁烷-2-酮通过氢化获得具有3, 4-顺式立体
化学的热力学不稳定异构体,是合成各种替代品单环内酰胺的关键中间体。此外,还合成了一些简单的单环内酰胺类似物。