Synthesis of Termini-Differentiated 6-Carbon Stereotetrads: An Alkylative Oxidation Strategy for Preparation of the C21−C26 Segment of Apoptolidin<sup>1</sup>
作者:Yuzhong Chen、Jerry B. Evarts、Eduardo Torres、Philip L. Fuchs
DOI:10.1021/ol026377m
日期:2002.10.1
an enantiospecific catalytic Jacobsen epoxidation of 1a and is five operations shorter. The second sequence features an oxygen-directed alkylative oxidation reaction that re-establishes the dienyl sulfone functionality with concomitant 1,3-transposition of the sulfone moiety.
[反应:见正文]已开发出两种合成环氧化物36的方法。第一种方法使用(+)-pulegone 25作为对映体纯原料,并在12次操作中引入了靶标22所需的复杂性。第二种方法采用1a的对映特异性催化Jacobsen环氧化,操作时间短了五个。第二个序列的特征是氧导向的烷基化氧化反应,该反应可重建二烯基砜官能团,并伴有砜部分的1,3-转移。