作者:Zhengtao Li、Yingxiang Gao、Yefeng Tang、Mingji Dai、Guoxin Wang、Zhigang Wang、Zhen Yang
DOI:10.1021/ol800977n
日期:2008.7.17
Stereoselective total synthesis of natural product crisamicin A (1) was accomplished for the first time via the Pd/TMTU-catalyzed alkoxycarbonylative annulation to generate a unique cis-pyran-fused lactone, an intermolecular Diels-Alder reaction to construct the pyranonaphthoquinone unit, and a novel Pd-thiourea pincer complex-catalyzed homocoupling of functionalized naphthoquinones.
Stereoselective Total Synthesis of the Dimeric Naphthoquinonopyrano-γ-lactone (−)-Crisamicin A: Introducing the Dimerization Site by a Late-Stage Hartwig Borylation
作者:Julia Kopp、Reinhard Brückner
DOI:10.1021/acs.orglett.0c01078
日期:2020.5.1
stereoselective totalsynthesis of the dimeric naphthoquinonopyrano-γ-lactone (-)-crisamicin A was realized (13 steps, 5% overall yield). 1,4,5-Trimethoxynaphthalene, reached in five known steps, was brominated at C-3 to install a but-3-enoic ester by an ensuing Heck coupling. An asymmetric Sharpless dihydroxylation followed and gave a β-hydroxy-γ-lactone with >99.9% ee. Its OH substituent and acetaldehyde