366006-09-9Relevant articles and documents
Diastereoselective synthesis of conformationally restricted KOR agonists
Ilari, Denise,Maskri, Sarah,Schepmann, Dirk,K?hler, Jens,Daniliuc, Constantin G.,Koch, Oliver,Wünsch, Bernhard
, p. 4082 - 4099 (2021/05/19)
In order to analyze the bioactive conformation of flexible KOR agonists the ethylenediamine KOR pharmacophore was conformationally constrained by incorporation into a bicyclic system. For this purpose, 2-azabicyclo[3.2.1.]octan-7-amines were designed, synthesized and pharmacologically evaluated. The primary amine 14 as first key intermediate was prepared in a six-step synthesis starting with methyl cyclopent-3-enecarboxylate 9. Whereas phenylacetamides failed to provide bicyclic compounds, the intramolecular nucleophilic substitution of the sulfonamide 25 was initiated by deprotonation with NaH affording the bicyclic compound 26 in 72% yield. The three-step introduction of the pharmacophoric pyrrolidine ring started with nucleophilic substitution of exo-configured tosylate 26 with NaN3, which unexpectedly occurred under retention of configuration leading to exo-configured azide 31. The final KOR agonists 35 and 36 with exo-configured amino moieties were obtained by removal of the N-tosyl moiety of 33 and introduction of the second pharmacophoric element by acylation with dihalophenylacetyl chlorides. The KOR affinity of the pyrrolidine 35a is in the high nanomolar range (Ki = 862 nM). The low KOR affinity is explained by a non-appropriate dihedral angle of 137°/141° of the N(pyrrolidine)-C-C-N(acyl) system. As observed for stereoisomers of potent KOR agonists, phenylacetamide 35a and more importantly sulfonamides 33a and 33b show moderate affinity at σ1 receptors (Ki = 109-208 nM). This journal is
ANTIBACTERIAL BIAROMATIC DERIVATIVES
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Page/Page column 103, (2014/11/11)
The invention relates to antibacterial compounds of formula I (I) wherein R is H, cyano, alkoxy, cyanomethoxy, cycloalkylmethoxy, hydroxyalkoxy, alkoxyalkoxy, alkoxycarbonyl, 2-ethoxy-2-oxoethoxy, 2-(methylamino)-2-oxoethoxy, (l-cyanocyclobutyl)methoxy, 3-hydroxy-pyrrolidin-l-yl or 3,4-dihydroxycyclopentyl)methoxy; U1 is N or CR1, U2 is N or CR2, U3 is N or CR3 and U4 is N or CR4, it being understood that at most three of U1, U2, U3 and U4 can be N at the same time; V1 is N or CR5, V2 is N or CR6, V3 is N or CR7 and V4 is N or CH, it being understood that at most two of V1, V2, V3 and V4 can be N at the same time; R1 is H, cyano, hydroxy or alkoxy; R2 is H, hydroxy or alkoxy; R3 is H, cyano, hydroxy, alkoxy or carboxamido; R4 is H or alkoxy; R5 is H, hydroxy or halogen; R6 is H, hydroxy or halogen; R7 is H; the dotted line "_____ " represents a bond or is absent; W represents CH or N when the dotted line "_____ " is a bond, or W represents CH2 when the dotted line "_____ " is absent; X represents CH or N; and Q represents O or S; and salts thereof.
NITROOXY CYCLOALKANE DERIVATIVES
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Page/Page column 19-20, (2010/06/17)
A compound having the structure wherein Y is selected from the group consisting of –C(O)OR2, -C(O)NHR8, -C(CH2)1-2OR3, OH, and or a pharmaceutically acceptable salt thereof, and methods of using the compounds for treating hypertension.
