The Cobalt Way to Angucyclinones: Asymmetric Total Synthesis of the Antibiotics (+)-Rubiginone B2, (−)-Tetrangomycin, and (−)-8-O-Methyltetrangomycin
作者:Christian Kesenheimer、Aris Kalogerakis、Anja Meißner、Ulrich Groth
DOI:10.1002/chem.201000804
日期:2010.8.2
A cobalt(I)‐mediated convergent and asymmetric total synthesis of angucyclinones with an aromatic B ring has been developed. In the course of our research, we synthesized three naturally occurring anguclinone derivatives, namely, (+)‐rubiginone B2 (1), (−)‐8‐O‐methyltetrangomycin (2), and (−)‐tetrangomycin (3). By combining 3‐hydroxybenzoic acid, 3‐methoxybenzoic acid, citronellal, and geraniol as
已经开发了钴(I)介导的具有芳香族B环的古环素酮的收敛和不对称全合成。在我们的研究过程中,我们合成了三种天然存在的Anguclinone衍生物,分别是(+)-rubiginone B 2(1),(-)-8- O-甲基丁香霉素(2)和(-)-丁香霉素(3) 。通过以收敛方式结合3-羟基苯甲酸,3-甲氧基苯甲酸,香茅醛和香叶醇作为起始原料,我们能够合成手性三炔链,并被[CpCo(C 2 H 4)2环化分子内[2 + 2 + 2]环加成到相应的四氢苯并[ a ]蒽上来合成](Cp =环戊二烯基)。导致上述的天然产物连续氧化和脱保护步骤1 - 3。