Regio-selective hydroxylation of gem-difluorinated octanes by alkane hydroxylase (AlkB)
摘要:
gem-Difluoromethylene substituted molecules constitute a distinct class of fluorinated compounds. In this study, special chemistry has been developed for their preparation based on the highly selective terminal hydroxylation of these gem-difluorinated octanes by AlkB (alkane hydroxylase) from Pseudomonas putida Gpo1 to form gem-difluorinated octan-1-ols. The hydroxylation reaction is performed by whole-cell catalysis. Identification of the distal- and proximal-hydroxylation products was made by H-1, C-13, and F-19 NMR; GC and GC/MSD; and/or by comparison with authentic standards in GC. To the best of our knowledge, we have obtained the first synthesis of 2,2-, 3,3- and 4,4-difluorooctan-1-ols, from simple and inexpensive starting materials. (C) 2011 Elsevier Ltd. All rights reserved.
Tuning the Regio- and Stereoselectivity of CH Activation in n-Octanes by Cytochrome P450 BM-3 with Fluorine Substituents: Evidence for Interactions Between a CF Bond and Aromatic π Systems
n‐octane oxidation. In addition, the alanine at residue 328 was replaced with a phenylalanine to introduce an aromatic residue into the hydrophobic pocket to examine whether or not van der Waals interactions between a CF substituent in the substrate and the polarizable π system of the phenylalanine may be used to steer the positioning of the substrate within the active‐site pocket of the enzyme and control
The disclosure provides compounds of formula I, including pharmaceutically acceptable salts, as well as compositions and methods of using the compounds. The compounds have activity against hepatitis C virus (HCV) and may be useful in treating those infected with HCV.
ANTIMICROBIAL POLYMYXINS FOR TREATMENT OF BACTERIAL INFECTIONS
申请人:MICURX PHARMACEUTICALS, INC.
公开号:US20160185823A1
公开(公告)日:2016-06-30
The present invention provides antimicrobial polymyxin compounds of the following formula I:
or pharmaceutically acceptable salts, hydrates, or solvates thereof that are antibacterial agents, pharmaceutical compositions containing them, methods for their use, and methods for preparing these compounds.
D-amino acid derivative-modified peptidoglycan and methods of use thereof
申请人:The Regents of the University of California
公开号:US10016498B2
公开(公告)日:2018-07-10
The present disclosure provides modified bacteria and modified peptidoglycan comprising modified D-amino acids; compositions comprising the modified bacteria or peptidoglycan; and methods of using the modified bacteria or peptidoglycan. The modified D-amino acids include a bioorthogonal functional group such as an azide, an alkyne or a norbornene group. Also provided are modified peptidoglycans conjugated to a molecule of interest via a linker.
Compounds of Formula I:
wherein:
R1 and R2 are hydrogen or C1 to C12 linear or branched alkyl; R3 is hydrogen, C1 to C12 linear or branched alkyl, or nitrogen protecting groups; X is oxygen or nitrogen; and when X is oxygen, R4 is absent; and when X is nitrogen, R4 is C1 to C12 linear or branched alkyl or nitrogen protecting groups. The compounds are useful as reagents in 1,3-cycloaddition reactions.
式 I 的化合物:
其中
R1 和 R2 是氢或 C1 至 C12 直链或支链烷基;R3 是氢、C1 至 C12 直链或支链烷基或氮保护基团;X 是氧或氮;当 X 是氧时,R4 不存在;当 X 是氮时,R4 是 C1 至 C12 直链或支链烷基或氮保护基团。这些化合物可用作 1,3-氰基加成反应的试剂。