在此,我们报道了兰霉素 Q 和 R 以及苷元核心(即脱水兰霉素酮和相关核心类似物)的全合成。该合成采用乙酸酯辅助芳基化方法来构建核心成分中的受阻B环,并采用一锅芳构化-脱碘-去苄基化程序来简化整体功能和保护基团的操作。随后的细胞毒性和抗菌研究表明,landomycin R 是一种针对耐甲氧西林金黄色葡萄球菌的潜在抗菌剂。
A Unified Strategy for the Syntheses of Angucyclinone Antibiotics: Total Syntheses of Tetrangulol, Kanglemycin M, X-14881-E, and Anhydrolandomycinone
作者:Devendar Goud Vanga、Krishna P. Kaliappan
DOI:10.1002/ejoc.201200049
日期:2012.4
accomplish the totalsyntheses of tetrangulol, kanglemycinM, X-14881-E, and anhydrolandomycinone in moderate to good overall yields. The requisite diene was synthesized in excellent yield from a known enyne through an intramolecular enyne metathesis. The scope of this flexible and divergent strategy can be extended to the syntheses of similar scaffolds and unnatural aromatic angucyclinones.
Room-Temperature B(OAc)<sub>3</sub>-Promoted Diels–Alder Reaction of Juglone with Styrenes: Total Syntheses of Tetrangulol and Anhydrolandomycinone
作者:Day-Shin Hsu、Jiun-Yi Huang
DOI:10.1021/jo202448e
日期:2012.3.16
The Diels–Alderreaction of juglone with various styrenes in the presence of 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) was promoted by B(OAc)3 at room temperature. The reaction proceeded smoothly and gave the products in a good yield and with excellent regioselectivity. This strategy was applied to the total syntheses of tetrangulol and anhydrolandomycinone.
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 Dötzbenzannulationreaction 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
A general strategy for diverse syntheses of anhydrolandomycinone, tetrangulol, and landomycinone
作者:Cheng-Jhe Sie、Venukumar Patteti、Yi-Ru Yang、Kwok-Kong Tony Mong
DOI:10.1039/c7cc09818a
日期:——
A general synthetic strategy based on a protecting group-promoted CH arylation method was developed for total syntheses of anhydrolandomycinone (1), tetrangulol (2), and landomycinone (3) from the same set of starting materials.