作者:John W. Banks、Andrei S. Batsanov、Judith A. K. Howard、David O’Hagan、Henry S. Rzepa、Sonsoles Martin-Santamaria
DOI:10.1039/a907452j
日期:——
X-Ray structures of two α-fluoroamide derivatives show the OCâCâF moiety tending towards a trans planar conformation, for which ab initio calculations suggest a deep (up to 8 kcal molâ1) potential minimum.
An Unusual Conformation of α-Haloamides Due to Cooperative Binding with Zincated Porphyrins
作者:Marina Tanasova、Qifei Yang、Courtney C. Olmsted、Chrysoula Vasileiou、Xiaoyong Li、Mercy Anyika、Babak Borhan
DOI:10.1002/ejoc.200900089
日期:2009.9
with a zinc porphyrin leads to an unprecedented conformation for the determination of the absolute stereochemistry of α-haloamides (α-halocarboxylic acids derivatized with 1,4-phenylenediamine) through the use of exciton-coupled circular dichroism (ECCD). With the use of chiral lactams, whose rotomeric contributions are minimized, both ECCD and NMR spectroscopy demonstrate that the porphyrin favors binding
Synthesis and Conformation of Fluorinated β-Peptidic Compounds
作者:Victoria Peddie、Raymond J. Butcher、Ward T. Robinson、Matthew C. J. Wilce、Daouda A. K. Traore、Andrew D. Abell
DOI:10.1002/chem.201200313
日期:2012.5.21
that, for α‐fluoroamides, the FCC(O)N(H) moiety adopts an antiperiplanar conformation. In addition, a gauche conformation is favoured between the vicinal CF and CN(CO) bonds in N‐β‐fluoroethylamides. This study details the synthesis of a series of fluorinated β‐peptides (1–8) designed to use these stereoelectronic effects to control the conformation of β‐peptide bonds. X‐ray crystal structures of
[EN] PROCESS FOR PREPARING 2-FLUOROPROPIONALDEHYDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 2-FLUOROPROPIONALDÉHYDE
申请人:SANDOZ AG
公开号:WO2016016446A1
公开(公告)日:2016-02-04
A process comprising (i) providing a 2-fluoropropionic acid halide; (ii) hydrogenating the 2-fluoropropionic acid halide by contacting it with a heterogeneous hydrogenation catalyst in an atmosphere comprising hydrogen, obtaining a mixture comprising 2-fluoropropionic aldehyde.