Stereoselective total synthesis of (-)-spirofungin A by utilising hydrogen-bond controlled spiroketalisation.
Stereoselective total synthesis of (-)-spirofungin A by utilising hydrogen-bond controlled spiroketalisation.
复制标题
利用氢键控制的螺缩酮化立体选择性全合成 (-)-螺芬净 A。
DOI:
10.1002/chem.201002501
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
M. Rizzacasa
中科院分区:
文献类型:
--
作者:
J. Lynch;S. Zanatta;J. White;M. Rizzacasa
The stereoselective total synthesis of the spiroketal containing Streptomyces metabolite (-)-spirofungin A (1) is described. A key step involved a spiroketalisation controlled by an intramolecular H-bond which favoured the desired spiroketal 4 (13:1 ratio). The presence of the intramolecular H-bond in 4 is possibly due to a 1,5-alkyne-oxygen interaction. Other key steps include an efficient cross-metathesis to form the spiroketal precursor, a tin mediated syn-aldol reaction and a Stille cross-coupling reaction to create the C22C23 bond. A final Wittig extension followed by deprotection gave (-)-spirofungin A (1).
影响因子:
5.2
作者:
Crimmins, Michael T.;O'Bryan, Elizabeth A.
通讯作者:
O'Bryan, Elizabeth A.