SYNTHESIS OF FLUORO HEMIACETALS VIA TRANSITION METAL-CATALYZED FLUORO ESTER AND CARBOXAMIDE HYDROGENATION
申请人:Triad National Security, LLC
公开号:US20200308089A1
公开(公告)日:2020-10-01
This application is directed to use of transition metal-ligand complexes to hydrogenate fluorinated esters and carboxamides into fluorinated hemiacetals. Methods for synthesis of certain ligands are also provided.
Practical Selective Hydrogenation of α-Fluorinated Esters with Bifunctional Pincer-Type Ruthenium(II) Catalysts Leading to Fluorinated Alcohols or Fluoral Hemiacetals
作者:Takashi Otsuka、Akihiro Ishii、Pavel A. Dub、Takao Ikariya
DOI:10.1021/ja403852e
日期:2013.7.3
Selective hydrogenation of fluorinatedesters with pincer-type bifunctional catalysts RuHCl(CO)(dpa) 1a, trans-RuH2(CO)(dpa) 1b, and trans-RuCl2(CO)(dpa) 1c under mild conditions proceeds rapidly to give the corresponding fluorinatedalcohols or hemiacetals in good to excellent yields. Under the optimized conditions, the hydrogenation of chiral (R)-2-fluoropropionate proceeds smoothly to give the corresponding
The present disclosure provides processes for the preparation of a compound of formula I:
which is useful as an antiviral agent. The disclosure also provides compounds and processes for the preparation of the compounds that are synthetic intermediates to the compound of formula I.
Chiral Brønsted Acid‐Mediated Enantioselective Organocatalytic Three‐Component Reaction for the Construction of Trifluoromethyl‐Containing Molecules
作者:Guang‐Wu Zhang、Lian Wang、Jing Nie、Jun‐An Ma
DOI:10.1002/adsc.200800239
日期:2008.7.7
combination with the advantages of organocatalysis, we have developed a highly enantioselective Friedel–Crafts aminoalkylation of indoles with imines generated in situ from trifluoroacetaldehyde methyl hemiacetal and aniline. Novel chiral trifluoromethyl-containing compounds were obtained in high yields with excellent enantioselectivities. This methodology was further extended to difluoroacetaldehyde methyl