Internally Masked Neopentyl Sulfonyl Ester Cyclization Release Prodrugs of Acamprosate, Compositions Thereof, and Methods of Use
申请人:Li Yunxiao
公开号:US20090099253A1
公开(公告)日:2009-04-16
Internally masked neopentyl sulfonyl ester prodrugs of acamprosate, pharmaceutical compositions comprising such prodrugs, and methods of using such prodrugs and compositions thereof for treating diseases are disclosed. In particular, acamprosate prodrugs exhibiting enhanced oral bioavailability and methods of using acamprosate prodrugs to treat neurodegenerative disorders, psychotic disorders, mood disorders, anxiety disorders, somatoform disorders, movement disorders, substance abuse disorders, binge eating disorder, cortical spreading depression related disorders, tinnitus, sleeping disorders, multiple sclerosis, and pain are disclosed.
Enantioselective Desymmetrization of 1,3-Diols by a Chiral DMAP Derivative
作者:Hiroki Mandai、Kosuke Ashihara、Koichi Mitsudo、Seiji Suga
DOI:10.1246/cl.180697
日期:2018.11.5
We developed an enantioselective desymmetrization of 1,3-diols by a chiral N,N-dimethyl-4-aminopyridine (DMAP) derivative containing a 1,1′-binaphthyl with tert-alcohol units. The reactions require...
The synthesis of acetomycin and related analogs was investigated. Acetomycin was synthesized from diethyl allyl(methyl)malonate in 6.5% yield over 18 steps. The total number of steps was improved compared to our previous synthesis; i.e., four steps shorter, and the total yield was 4.5% greater than the previous synthesis. Acetomycin analogs with benzoyloxy and pivaloyloxy groups, instead of an acetoxy group at the 5-position of the γ-butyrolactone ring were designed as esterase-resistant models and prepared similarly.Although they showed a similar level of cytotoxicity as acetomycin in vitro, they were not resistant to porcine liver esterase, and lost cytotoxicity in vivo.
The structures of three metabolites isolated from the urine of rabbits and dogs admintstered with meprobamate (2-methyl-2-n-propyl-1, 3-propanediol dicarbamate) were established as keto-meprobamate [2-methyl-2-(2-oxo-propyl)-1, 3-propanediol dicarbamate], hydroxy-meprobamate [2-methyl-2-(2-hydroxypropyl)-1, 3-propanediol dicarbamate] and carboxy-meprobamate [2-methyl-2-(2-carboxyethyl)-1, 3-propanedioi dicarbamate].