The Heck-Matsuda arylation of chiral 2-(S)-hydroxymethyl dihydrofurans (endocyclic enolethers) and its derivatives, employing arenediazonium tetrafluoroborates, was developed into a highly efficient, practical and diastereoselective synthetic process. This methodology was applied to the total synthesis of the styryllactone (-)-isoaltholactone in seven steps with an overall yield of Ë25%, from the readily available chiral 2-hydroxymethyldihydrofuran. The strategy permits the synthesis of several other aromatic analogues of isoaltholactone.
使用芳基
二氮烯四
氟硼酸盐,高效、实用且具有立体选择性地开发了手性2-(S)-羟甲基二氢
呋喃(内环烯醚)及其衍
生物的Heck-Matsuda芳基化反应。这一方法被应用于从易于获得的2-羟甲基二氢
呋喃出发,在七步内完成酯状烯烃(-)-isoaltholactone的全合成,总产率超过25%。该策略还允许合成几种isoaltholactone的芳香类似物。