作者:Bruce P. McKillican、Jeffrey W. Perine、Dana P. Simmons、Timothy E. Wilson
DOI:10.1002/jlcr.892
日期:2005.1
The natural products avemectin B1a 1a and B1b 1b were each site-specifically 14C labelled at carbon 23 in a convergent synthesis for metabolism, residue, and environmental studies. The 12-step radiosynthesis involved a stereoselective aldol condensation and later a coupling to a protected avermectin degradate 2 in a one-pot Wittig condensation/spiroketalization to reconstitute the dioxaspirane configuration found in the natural products. Copyright © 2004 John Wiley & Sons, Ltd.
在一个用于代谢、残留和环境研究的聚合合成过程中,天然产物阿维菌素 B1a 1a 和 B1b 1b 分别在碳 23 处进行了位点特异性 14C 标记。12 步放射合成包括立体选择性醛醇缩合,然后通过一锅威蒂格缩合/螺酮化反应与受保护的阿维菌素降解物 2 偶联,以重建天然产物中的二氧杂环戊烷构型。Copyright © 2004 John Wiley & Sons, Ltd. All Rights Reserved.