Photocatalytic enantioselective Minisci reaction of β-carbolines and application to natural product synthesis
作者:Mu-Peng Luo、Yi-Jie Gu、Shou-Guo Wang
DOI:10.1039/d2sc05313f
日期:——
A highly efficient enantioselective direct C–H functionalization of β-carbolines via a Minisci-type radical process under a photo-redox and chiral phosphoric acid cooperative catalytic system has been disclosed. Through this protocol, a wide range of C1 aminoalkylated β-carbolines were constructed directly with high levels of enantioselectivities from readily available β-carbolines and alanine-derived
β-咔啉的高效对映选择性直接 C-H 官能化已经公开了在光氧化还原和手性磷酸协同催化体系下的Minisci型自由基过程。通过该协议,从现成的 β-咔啉和丙氨酸衍生的氧化还原活性酯中直接构建了具有高水平对映选择性的各种 C1 氨基烷基化 β-咔啉。这种转化可以直接获得非常有价值的富含对映体的 β-咔啉,这是有价值的天然产物和合成生物活性化合物中一个有趣的结构基序。该协议已被用作海洋生物碱 eudistomin X、(+)-eudistomidin B 和 (+)-eudistomidin I 的简洁不对称全合成的高效合成策略。
Establishment of the absolute configuration of the bioactive marine alkaloid eudistomin X by stereospecific synthesis
作者:Rhys Finlayson、Amira Brackovic、Annabel Simon-Levert、Bernard Banaigs、Ronan F. O’Toole、Christopher H. Miller、Brent R. Copp
DOI:10.1016/j.tetlet.2010.12.052
日期:2011.2
A stereospecificsynthesis of both enantiomers of the marine alkaloid eudistomin X using the amino acid chiral pool is achieved. Comparison of 1H and 13C NMR chemical shifts of the synthetic product as either the free base, mono-salt or disalt with those reported for the natural product established that the ascidian metabolite was originally characterised as a mono-salt and that the absolute configuration
使用氨基酸手性库实现了海洋生物碱eudistomin X的两个对映异构体的立体定向合成。将合成产物以游离碱,单盐或二盐形式进行的1 H和13 C NMR化学位移与天然产物的报道进行比较,确定了海鞘代谢物最初被表征为单盐,并且其绝对构型是(10 R)。