The present invention provides an asymmetric hydrogenation process for the preparation of chiral cycloalkanoindole DP receptor antagonists in high enantiomeric excess.
本发明提供了一种不对称加氢过程,用于制备手性环烷基吲哚DP受体拮抗剂,其手性过量度高。
Base-Catalyzed Intramolecular Defluorination/O-Arylation Reaction for the Synthesis of 3-Fluoro-1,4-oxathiine 4,4-Dioxide
作者:Jinlong Qian、Gaoxi Jiang、Lei Kang、Jinlong Zhang、Huameng Yang
DOI:10.1055/a-1387-8862
日期:2021.5
A novel process involving base-catalyzed intramolecular defluorination/O-arylation of readily available α-fluoro-β-one-sulfones was realized and provided a series of 3-fluoro-1,4-oxathiine 4,4-dioxide derivatives in good to excellent yields. Unlike traditional defluorination reactions with stoichiometric base as the deacid reagent, this process is triggered by a catalytic amount of base (TMG: tetramethylguanidine)
An efficientmethod is reported to synthesize sulfonamides on DNA from sulfinic acids or sodium sulfinates and amines in the presence of iodine under mild conditions. This method demonstrates a major expansion of scope of sulfonamide formation on DNA through the utilization of a novel sodium carbonate-sodium sulfinate bifunctional reagent class.