Versatile Configuration-Encoded Strategy for Rapid Synthesis of 1,5-Polyol Stereoisomers
作者:Gregory K. Friestad、Gopeekrishnan Sreenilayam
DOI:10.1021/ol1021417
日期:2010.11.5
The isolated stereogenic centers of 1,5-polyol-containing natural products present challenges to synthesis and structure determination. To address this problem, a configuration-encoded strategy defines each configuration within a simple 4-(arylsulfonyl)butyronitrile building block, a repeat unit that is reliably and efficiently coupled in iterative fashion to afford 1,5-polyols of defined stereochemistry. For example, the C27-C40 subunit of tetrafibricin is prepared in five steps and 42% yield. This strategy is amenable to rapid and unambiguous preparation of all configurational permutations of 1,5-polyols with equal facility.
Unified Strategy for 1,5,9- and 1,5,7-Triols via Configuration-Encoded 1,5-Polyol Synthesis: Enantioselective Preparation of γ-Sulfonyl-α-silyloxyaldehydes and Iterative Julia–Kocienski Coupling
作者:Ryan M. Friedrich、Gopeekrishnan Sreenilayam、Jacob Hackbarth、Gregory K. Friestad
DOI:10.1021/acs.joc.8b02033
日期:2018.11.16
targeted synthetic strategies to access all stereoisomers of a 1,5-polyol family from cheap and easily accessible reagents while avoiding the need to determine configurations at each alcohol stereocenter. Here, we address these problems via design and implementation of an iterative configuration-encoded strategy to access 1,5-polyols with unambiguous stereocontrol; the coupling event exploits Julia–Kocienski