73604-40-7Relevant academic research and scientific papers
Structure-Activity Studies on Benzhydrol-Containing Nipecotic Acid and Guvacine Derivatives as Potent, Orally-Active Inhibitors of GABA Uptake
Pavia, Michael R.,Lobbestael, Sandra J.,Nugiel, David,Mayhugh, Daniel R.,Gregor, Vlad E.,et al.
, p. 4238 - 4248 (2007/10/02)
The introduction of lipophilic groups onto the ring nitrogen of nipecotic acid and guvacine, two known GABA uptake inhibitors, afforded potent, orally-active anticonvulsant drugs.A series of compounds is reported which explores the structure-activity relationships (SAR) in this series.Among the areas explored: side-chain SAR (aromatic-, heterocyclic-, and tricyclic-containing side chains) and modifications to the tetrahydropyridine ring.The benzhydrol ether-containing side chains afforded the most potent compounds with several exhibiting in vitro IC50 values for GABA uptake of 1 μM (including 5, Table I; 37, 43, Table IV; and 44, Table V).Compound 44 was selected for extensive evaluation and subsequently progressed to Phase 1 clinical trials with severe adverse effects seen after single dose administration to humans.
Vinyl Cation Formation by Decomposition of Vinyl-lead Triacetates. The Reactions of Vinylmercury and Vinyltin Compounds with Lead Tetra-acetate
Moloney, Mark G.,Pinhey, John T.,Stoermer, Martin J.
, p. 2645 - 2655 (2007/10/02)
Vinylmercury compounds and vinylstannanes undergo rapid metal-metal exchange with lead tetra-acetate in chloroform to generate vinyl-lead triacetates, unstable compounds which undergo a thermodynamically favourable reductive elimination of lead(II) acetate.In the presence of mercury(II) salts, vinyl-lead triacetates collapse to the corresponding enol acetate, but in the absence of mercury(II) they yield either the enol acetate or an acetylene depending on the substitution at the double bond.Evidence for the formation of vinyl cations in the collapse of a number of vinyl-lead triacetates has been obtained.Strong support for such intermediates comes from the decomposition of (E)-o-methoxystyryl-lead triacetate, where the nature of the participation by the neighbouring methoxy group excluded the possibility of involvement of an alkylidenecarbene.Attempted trapping of an alkylidenecarbene by cyclohexane in the decomposition of 2-methylprop-1-enyl-lead triacetate was also unsuccessful, indicating the absence of such an intermediate.
REACTION OF DILITHIUM BENZOPHENONE, DILITHIUM 9-FLUORENONE AND THE LITHIUM SALT OF BENZOPHENONE KETYL WITH CHLORIDES AND ANHYDRIDES OF CARBOXYLIC ACIDS
Honzl, J.,Metalova, M.
, p. 297 - 306 (2007/10/02)
The reaction of dilithium benzophenone and the lithium salt of benzophenone ketyl with anhydrides and chlorides of benzoic and acetic acid and the reaction of dilithium 9-fluorenone with acetic anhydride were investigated.In addition to the expected products Ar2C(COR)OCOR, products of the type Ar2C=CR(OCOR) were also obtained, and in the case of reactions with acetyl chloride and acetic anhydride, products of the type Ar2CH(OCOR).ESR studies showed that ketyl is formed in the reaction of dilithium benzophenone with acetic anhydride, and the ClDNP method revealed thatbenzhydryl acetate is formed, at least in part, by hydrogen transfer to a free radical produced by O-acetylation of the ketyl.The results suggest a competition between addition and electron transfer reactions.
