Direct Observation and Analysis of the Halo-Amino-Nitro Alkane Functional Group
作者:Michael S. Crocker、Hayden Foy、Kazuyuki Tokumaru、Travis Dudding、Maren Pink、Jeffrey N. Johnston
DOI:10.1016/j.chempr.2019.03.001
日期:2019.5
amide synthesis is a mainstay in discipline-spanning applications, and it is a reaction type that historically developed as a singular paradigm when considering the carbon-nitrogen bond-forming step. Umpolung amide synthesis (UmAS) exploits the unique properties of an α-halo nitroalkane in itsreaction with an amine to produce an amide. The “umpolung” moniker reflects its paradigm-breaking C–N bond
The Henry (nitroaldol) reaction of fluorinated nitro compounds with various aromatic aldehydes and a fluorinated aliphatic aldehyde to give β-fluoro-β-nitroalcohols which bearing a fluorinated quaternary carbon center was reported. The relative configuration of the major diastereoisomer of 2-fluoro-2-nitro-1-(4-nitrophenyl)-3-phenylpropanol (5bf) was determined by X-ray single crystal analysis.
Enantioselective Synthesis of β-Fluoro Amines via β-Amino α-Fluoro Nitroalkanes and a Traceless Activating Group Strategy
作者:Brandon A. Vara、Jeffrey N. Johnston
DOI:10.1021/jacs.6b07731
日期:2016.10.26
Preparation of a range of enantioenriched β-fluoro amines (α,β-disubstituted) is described in which the nitrogen and fluorine atoms are attached to sp3-hybridized carbons. The key finding is a chiral bifunctional Brønsted acid/base catalyst that can deliver β-amino-α-fluoro nitroalkanes with high enantio- and diastereoselection. A denitration step renders the nitro group "traceless" and delivers secondary
[EN] INDAZOLE DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM<br/>[FR] DERIVES D'INDAZOLE ET COMPOSITIONS PHARMACEUTIQUES RENFERMANT CEUX-CI
申请人:HOFFMANN LA ROCHE
公开号:WO2005085206A1
公开(公告)日:2005-09-15
Compounds of Formula (I), or pharmaceutically acceptable salts, solvates or prodrugs thereof, wherein m, k, B, R1, R2 and R3 are those defined herein, and compositions comprising the same. Also provided are methods for preparing compounds of formula (I) and using the same in treating p38 mediated disorders in a patient.
The Michael addition reactions of fluorinated nitro compounds with electron deficient olefins to give γ‐fluoro‐γ‐nitro‐esters, nitriles and ketones which bear a fluorinated quaternary carbon center were reported. The reactions were promoted by TMG, affording the desired adducts in acceptable to good yields.