Deprotection of pinacolyl boronate esters by transesterification with polystyrene–boronic acid
摘要:
Mild deprotection of pinacolyl boronate esters to the corresponding boronic acids was achieved in the presence of excess polystyrene-boronic acid via a transesterification process. The procedure allows for the cleavage of pinacolyl boronate esters in the presence of sensitive functional groups. Crown Copyright (C) 2004 Published by Elsevier Ltd. All rights reserved.
boron-masking strategy, new divalent cross-coupling modules have been designed for the efficient synthesis of boron-substituted oligoarenes. The modules, i.e., monoprotected o-, m-, and p-benzenediboronic acid derivatives, undergo highly selective Suzuki-Miyaura coupling with sp2 iodides, bromides, chlorides, and triflates, affording coupling products in which the protected boronyl groups are left intact
The present invention pertains generally to the field of therapeutic compounds, and more specifically to certain lipopeptide compounds comprising a cyclic peptide bearing a lipid side chain (for convenience, collectively referred to herein as “LP compounds”), which, inter alia, are antimicrobial, particularly antibacterial. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both in vitro and in vivo, to provide an antimicrobial function, particularly an antibacterial function, and in the treatment of diseases and conditions that are mediated by microbes, particularly bacteria, that are ameliorated by the antimicrobial function, particularly an antibacterial function, including bacterial diseases, optionally in combination with another agent, for example, another antibacterial agent.
To provide a novel oxyiminoalkanoic acid derivative which has excellent hypoglycemic and hypolipidemic actions and which is used for the prevention or treatment of diabetes mellitus, hyperlipemia, insulin insensitivity, insulin resistance and impaired glucose tolerance.
A compound represented by the formula:
1
wherein R
1
is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; X is a bond, —CO—, —CH(OH)— or a group represented by —NR
6
— wherein R
6
is a hydrogen atom or an optionally substituted alkyl group; n is an integer of 1 to 3; Y is an oxygen atom, a sulfur atom, —SO—, —SO
2
— or a group represented by —NR
7
— wherein R
7
is a hydrogen atom or an optionally alkyl group; ring A is a benzene ring optionally having additional one to three substituents; p is an integer of 1 to 8; R
2
is a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; q is an integer of 0 to 6; m is 0 or 1; R
3
is a hydroxy group, OR
8
(R
8
is an optionally substituted hydrocarbon group.) or NR
9
R
10
(R
9
and R
10
are the same or different groups which are selected from a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group or an optionally substituted acyl group or R
9
and R
10
combine together to form a ring); R
4
and R
5
are the same or different groups which are selected from a hydrogen atom or an optionally substituted hydrocarbon group wherein R
4
may form a ring with R
2
; provided that when R
1
is a ethoxymethyl, a C
1-3
alkyl, phenyl or p-methoxyphenyl and q=m=0, R
3
is NR
9
R
10
; and provided that O-[2-chloro-4-(2-quinolylmethoxy)phenylmethyl]oxime and a methylpyruvate of [2-chloro-4-(2-quinolylmethoxy)phenylmethyl]-2-iminoxypropionic acid are excluded; or a salt thereof.
Oxyiminoalkanoic acid derivatives with hypoglycemic and hypolipidemic activity
申请人:Takeda Chemical Industries, Ltd.
公开号:US06251926B1
公开(公告)日:2001-06-26
This invention provides a novel oxyiminoalkanoic acid derivative which has excellent hypoglycemic and hypolipidemic actions and which is used for the treatment of diabetes mellitus, hyperlipemia, insulin insensitivity, insulin resistance and impaired glucose tolerance.
Pyranone, Thiopyranone, and Pyridone Inhibitors of Phosphatidylinositol 3-Kinase Related Kinases. Structure−Activity Relationships for DNA-Dependent Protein Kinase Inhibition, and Identification of the First Potent and Selective Inhibitor of the Ataxia Telangiectasia Mutated Kinase
作者:Jonathan J. Hollick、Laurent J. M. Rigoreau、Celine Cano-Soumillac、Xiaoling Cockcroft、Nicola J. Curtin、Mark Frigerio、Bernard T. Golding、Sophie Guiard、Ian R. Hardcastle、Ian Hickson、Marc G. Hummersone、Keith A. Menear、Niall M. B. Martin、Ian Matthews、David R. Newell、Rachel Ord、Caroline J. Richardson、Graeme C. M. Smith、Roger J. Griffin
DOI:10.1021/jm061121y
日期:2007.4.1
Structure-activity relationships have been investigated for inhibition of DNA-dependent protein kinase (DNA-PK) and ATM kinase by a series of pyran-2-ones, pyran-4-ones, thiopyran-4-ones, and pyridin-4-ones. A wide range of IC50 values were observed for pyranones and thiopyranones substituted at the 6-position, with the 3- and 5-positions proving intolerant to substitution. Related pyran-2-ones, pyran-4-ones, and thiopyran-4-ones showed similar IC50 values against DNA-PK, whereas the pyridin-4-one system proved, in general, ineffective at inhibiting DNA-PK. Extended libraries exploring the 6-position of 2-morpholino-pyran-4-ones and 2-morpholino-thiopyrano-4-ones identified the first highly potent and selective ATM inhibitor 2-morpholin-4-yl-6-thianthren-1-yl-pyran-4-one (151C; ATM; IC50 = 13 nM) and revealed constrained SARs for ATM inhibition compared with DNA-PK. One of the most potent DNA-PK inhibitors identified, 2-(4-methoxyphenyl)-6-(morpholin-4-yl)pyran-4-one (16; DNA-PK; IC50 = 220 nM) effectively sensitized HeLa cells to the topoisomerase II inhibitor etoposide in vitro.