4-溴-萘并[1,8-De:4,5-D'e']Bis[1,3]二氧(杂)芑置于叔丁基锂,Lithium Perchlorate,乙醛,(-)-Diisopinocamphenylborane Chloride体系中,用 四氢呋喃,水,乙腈 作为反应溶剂,化学反应 17.5H,反应生成 紫草素
参考文献:Concise And Efficient Total Syntheses Of Alkannin And Shikonin
标题:Concise And Efficient Total Syntheses Of Alkannin And Shikonin
摘要:Two Enantiomic Natural Products With Wound-Healing Properties,Alkannin (1) And Shikonin (2),Are Accessible By A Short And Efficient Total Synthesis. The Success Was Achieved By A Novel Protecting System For Masking Of 5,8-Dihydroxy-1,4-Naphthoquinones (Naphthazarins) And A Highly Stereoselective Ketone Reduction.
DOI:10.1002/(Sici)1521-3773(19980403)37:6<839::Aid-Anie839>3.0.Co;2-J