作者:Florian Clausen、Armido Studer
DOI:10.1021/acs.orglett.0c02294
日期:2020.9.4
The total synthesis of (+)-galbulin was achieved in 15% yield and 99% ee over eight steps from commercially available 4-veratraldehyde. The key steps include Meyer’s asymmetric tandem addition to a chiral 2-oxazoline-substituted naphthalene, a Pd-catalyzed stereospecific decarboxylative γ-arylation, and a formal anti-Markovnikov hydromethylation. In addition, five unnatural lignans were synthesized
(+)-球蛋白的总合成是在8个步骤中以15%的收率和99%ee的价格完成的,由市售的4-藜芦醛制成。关键步骤包括在手性2-恶唑啉取代的萘中进行Meyer不对称串联反应,Pd催化的立体特异性脱羧γ-芳基化反应和形式上的反马氏化学加氢甲基化反应。另外,使用相同的合成策略合成了五个非天然木酚素。