Studies on the Synthesis of Landomycin A. Synthesis of the Originally Assigned Structure of the Aglycone, Landomycinone, and Revision of Structure
作者:William R. Roush、R. Jeffrey Neitz
DOI:10.1021/jo049426c
日期:2004.7.1
aglycone of landomycin A, has been synthesized and shown to be nonidentical to the naturally derived landomycin A aglycone. The synthesis of 2 features the Dötz benzannulation reaction of chromium carbene 5 and alkyne 6, and the intramolecular Michael-type cyclization reaction of the phenolic naphthoquinone 20. It is proposed that natural landomycinone possesses the alternative structure 3, but attempts
已经合成了最初提出的土地霉素的结构(2),即土地霉素A的糖苷配基,并且显示出与天然来源的土地霉素A的糖苷配基不同。2的合成具有铬卡宾5和炔烃6的Dötz苯环化反应,以及酚类萘醌20的分子内Michael型环化反应。提出天然兰霉素具有替代结构3,但是尝试通过异构酚酚萘醌38的迈克尔型环化来接近该结构是不成功的。