作者:Yongfeng Tao、Keighley N. Reisenauer、Marco Masi、Antonio Evidente、Joseph H. Taube、Daniel Romo
DOI:10.1021/acs.orglett.0c02938
日期:2020.11.6
Pharmacophore-directed retrosynthesis applied to ophiobolin A led to bicyclic derivatives that were synthesized and display anticancer activity. Key features of the ultimate defensive synthetic strategy include a Michael addition/facially selective protonation sequence to set the critical C6 stereocenter and a ring-closing metathesis to form the cyclooctene. Cytotoxicity assays toward a breast cancer cell line (MDA-MB-231) confirm the anticipated importance of structural complexity for selectivity (vs MCF10A cells) while C3 variations modulate stability.
An Enantioselective Approach to 4-<i>O</i>-Protected-2-cyclopentene-l,4-diol Derivatives via a Rhodium-Catalyzed Redox-Isomerization Reaction
Kinetic resolution of a series of cyclopentene-1,4-diol derivatives has been successfully achieved with enantiomeric excess up to 99.4% and a kf/ks ratio of 55 by a rhodium-catalyzed redox-isomerization reaction in a noncoordinating solvent.
在非配位溶剂中,通过铑催化的氧化还原异构化反应,已成功实现了一系列环戊烯-1,4-二醇衍生物的动力学拆分,对映体过量高达99.4%,k f / k s比为55。