Synthesis of Trihydroxylated Pyrrolizidine using 1,3-Dipolar Cycloaddition of d-Erythrose Derived Nitrone
作者:Juraj Kubáň、Andrej Kolarovič、Lubor Fišera、Volker Jäger、Otakar Humpa、Nada Prónayová
DOI:10.1055/s-2001-18783
日期:——
A route has been developed for the synthesis of enantiomerically and diastereomerically pure trihydroxylated pyrrolizidines. A chiral sugar derived nitrone undergoes diastereoselective dipolar cycloaddition with methyl acrylate to afford erythro-cis isoxazolidine a suitable cycloadduct undergoes N-O cleavage and recyclization to (1S.2R.6R.7aS)-trihydroxylated pyrrolizidine
已经开发了合成对映体和非对映体纯三羟基化吡咯里西啶的路线。手性糖衍生的硝酮与丙烯酸甲酯发生非对映选择性偶极环加成反应,得到赤型-顺式异恶唑烷,合适的环加合物发生 NO 裂解并再环化成 (1S.2R.6R.7aS)-三羟基化吡咯里西啶