Enediolates from carboxylic acids react readily with cyclic α-chloroketones to give the corresponding γ-chloro-β-alkoxycarboxylate intermediates depending on the ring size. Small ring ketones lead to γ-chloro-β-hydroxy acids in a highly stereoselective way, whereas medium ring ketones give a mixture of β,γ-epoxy acids and γ-lactones.
Reactions of halonorbornane and oxo-substituted derivatives with different anions by the electron transfer mechanism; redox catalysis in stabilized radicals
作者:Jorge G. Uranga、Ana N. Santiago
DOI:10.1039/b9nj00503j
日期:——
3-chloronorbornan-2-one and 3-bromocamphor with Me3Sn−, Ph2P− or PhS− ions were studied by an SRN1 mechanism in liquid ammonia or DMSO. The results show that substrates having a carbonyl group facilitate electrontransfer reactions, which are impeded in the absence of such a group. However, when the free radical formed is stabilized by conjugation, the coupling reaction decreases, causing a concomitant increase
Non-imidazole alkylamines as histamine H3-receptor ligands and their therapeutic applications
申请人:——
公开号:US20040220225A1
公开(公告)日:2004-11-04
Use of a compound of formula (A), wherein:
1
W is a residue which imparts antagonistic and/or agonistic activity at histamine H
3
-receptors when attached to an imidazole ring in 4(5) position; R
1
and R
2
may be identical or different and represent each independently a lower alkyl or cycloalkyl, or taken together with the nitrogen atom to which they are attached, a saturated nitrogen-containing ring (i) as defined, a non-aromatic unsaturated nitrogen-containing ring (ii) as defined, a morpholino group, or a N-substituted piperazino group as defined for preparing medicaments acting as antagonists and/or agonists at the H
3
-receptors of histamine.
Non-imidazole alkylamines as histamine H3- receptor ligands and their therapeutic applications
申请人:Schwartz Jean-Charles
公开号:US20060247223A1
公开(公告)日:2006-11-02
Use of a compound of formula (A), wherein:
W is a residue which imparts antagonistic and/or agonistic activity at histamine H
3
-receptors when attached to an imidazole ring in 4(5) position; R
1
and R
2
may be identical or different and represent each independently a lower alkyl or cycloalkyl, or taken together with the nitrogen atom to which they are attached, a saturated nitrogen-containing ring (i) as defined, a non-aromatic unsaturated nitrogen-containing ring (ii) as defined, a morpholino group, or a N-substituted piperazino group as defined for preparing medicaments acting as antagonists and/or agonists at the H
3
-receptors of histamine.
NON-IMIDAZOLE ALKYLAMINES AS HISTAMINE H3-RECEPTOR LIGANDS AND THEIR THERAPEUTIC APPLICATIONS
申请人:SCHWARTZ Jean-Charles
公开号:US20110281844A1
公开(公告)日:2011-11-17
Use of a compound of formula (A), wherein:
W is a residue which imparts antagonistic and/or agonistic activity at histamine H
3
-receptors when attached to an imidazole ring in 4(5) position; R
1
and R
2
may be identical or different and represent each independently a lower alkyl or cycloalkyl, or taken together with the nitrogen atom to which they are attached, a saturated nitrogen-containing ring (i) as defined, a non-aromatic unsaturated nitrogen-containing ring (ii) as defined, a morpholino group, or a N-substituted piperazino group as defined for preparing medicaments acting as antagonists and/or agonists at the H
3
-receptors of histamine.