作者:Julia Becker、Lena Butt、Valeska von Kiedrowski、Elisabeth Mischler、Florian Quentin、Martin Hiersemann
DOI:10.1021/ol4028418
日期:2013.12.6
two different strategies is reported. The catalytic asymmetric Claisen rearrangement of Gosteli-type allyl vinyl ethers delivered elaborated α-keto ester building blocks. Ring-closing metatheses, including a notable diastereotopos-differentiating variant, a B-alkyl Suzuki–Miyaura cross-coupling reaction and a regio- and diastereoselective last-step epoxidation are key contributors.
据报道,通过两种不同的策略可以合成(-)-ecklonialactone B以及9,10-dihydro衍生物。Gosteli型烯丙基乙烯基醚的催化不对称Claisen重排提供了精心设计的α-酮酯结构单元。闭环复分解反应,包括一个显着的非对映体-分化变体,B-烷基铃木-宫浦交叉偶联反应以及区域和非对映体选择性的最后一步环氧化是关键的贡献者。