A greatly improvedprocedure for the preparation of long-chain α-ketopyridazines, a class of potent inhibitors of fattyacid amide hydrolase (FAAH), is described. This optimization study shows a great dependence of the yields of desired products on the pyrididazinyl lithium/Weinreb amide ratio and offers a general approach to this kind of compound.
[EN] NUCLEOSIDE TRIPHOSPHATE AND NUCLEOSIDE TRIPHOSPHATE ANALOGUE PRODRUGS<br/>[FR] PROMÉDICAMENTS DE NUCLÉOSIDE TRIPHOSPHATE ET D'ANALOGUES DE NUCLÉOSIDE TRIPHOSPHATE
申请人:UNIV HAMBURG
公开号:WO2018100137A1
公开(公告)日:2018-06-07
The invention relates to nucleoside triphosphate and nucleoside triphosphate analogue prodrugs. It is an object of the present invention to provide improved nucleoside triphosphate or nucleoside triphosphate analogue prodrugs. To achieve the object, the present invention provides in one aspect non-symmetrically double modified nucleoside triphosphate compounds, or their analogues, wherein the modification is carried out at the terminal, i.e. the γ-phosphate, or the corresponding analogous group, and wherein the first modification is adding a moiety A being intracellular stable, and the second modification is adding an intracellular labile mask B, which is cleaved within the cell, such that a nucleoside triphosphate or analogue thereof mono-modified with the intracellularly stable moiety A is released in the cell.
Potent inhibitors of fatty acid amide hydrolase (FAAH) are constructed having K
i
's below 200 pM and activities 10
2
-10
3
times more potent than the corresponding trifluoromethyl ketones. The potent inhibitors combine several features, viz.: 1.) an α-keto heterocylic head group; 2.) a hydrocarbon linkage unit employing an optimal C12-C8 chain length; and 3.) a phenyl or other π-unsaturation corresponding to the arachidonyl Δ
8,9
/Δ
11,12
and/or oleyl Δ
9,10
positions. A preferred α-keto heterocylic head group is α-keto N4 oxazolopyridine, with incorporation of a second weakly basic nitrogen. Fatty acid amide hydrolase is an enzyme responsible for the degradation of oleamide (an endogenous sleep-inducing lipid) and anandamide (an endogenous ligand for cannabinoid receptors).
Potent inhibitors of fatty acid amide hydrolase (FAAH) are constructed having K
i
's below 200 pM and activities 10
2
-10
3
times more potent than the corresponding trifluoromethyl ketones. The potent inhibitors combine several features, viz.: 1.) an α-keto heterocylic head group; 2.) a hydrocarbon linkage unit employing an optimal C12-C8 chain length; and 3.) a phenyl or other π-unsaturation corresponding to the arachidonyl Δ
8,9
/Δ
11,12
and/or oleyl Δ
9,10
positions. A preferred α-keto heterocylic head group is α-keto N4 oxazolopyridine, with incorporation of a second weakly basic nitrogen. Fatty acid amide hydrolase is an enzyme responsible for the degradation of oleamide (an endogenous sleep-inducing lipid) and anandamide (an endogenous ligand for cannabinoid receptors).
The first example of asymmetric alkene–alkene reductive coupling is demonstrated via visible-light-fueled photoredox/cobalt dual catalysis. The desymmetrization reaction provided products (>20 examples) with up to five chiral centers in single-step operation in up to 95% yields with very high relative (>99 : 1 dr) and absolute stereochemistry (up to 98 : 2 er) control. The preliminary mechanistic investigations