A Practical Asymmetric Synthesis of the Antiviral Agent Lobucavir, BMS-180194
摘要:
A practical synthesis of the antiviral agent lobucavir, [1R(1 alpha,2 beta,3 alpha)] -2-amino-9-[2,3-bis(hydroxymethyl)cyclobutyl]-6H-purin-6-one (BMS-180194), is described. The key chiral intermediate, [1S-(1 alpha,2 beta,3 alpha)]-3-hydroxy-1,2-cyclobutanedimethanol, dihenzoate ester, was made by an asymmetric [2 + 2] cycloaddition of dimenthyl fumarate with ketene dimethyl acetal followed by sequential diester reduction, benzoylation, deketalization, and stereoselective ketone reduction. Regioselective N9-alkylation of the tetra-n-butylammonium salt of 2-amino-6-iodopurine with the derived cyclobutyltriflate furnished the purinecyclobutyl dibenzoate. Methanolysis followed by acid hydrolysis produced lobucavir in a 35% overall yield with an ee, 99%.
cyclobutyl]adenine(4d) were prepared from the corresponding cyclobutylamine derivatives (1a, 1b and 1d). Guanine congeners (9a, cis- and trans-9b and 9d) and carbocyclicoxetanocin G (1',2'-trans-9f) were also prepared. Carbocyclicoxetanocin A(1',2'-trans-4f), the preparation of which we have already published, and G were found to be active against herpes simplex virus (type 1 and 2) in vitro, while
CYCLOBUTYL PURINE DERIVATIVE, ANGIOGENESIS PROMOTING AGENT, LUMEN FORMATION PROMOTING AGENT, NEUROCYTE GROWTH PROMOTING AGENT, AND DRUG
申请人:Tsukamoto Ikuko
公开号:US20110230659A1
公开(公告)日:2011-09-22
Provided is a compound having at least one selected from the group consisting of cell growth promoting activity, angiogenesis promoting activity, lumen formation promoting activity, cell migration promoting activity, and neurocyte growth promoting activity, which is a chemically stable low-molecular-weight substance that has high absorbability and can be supplied stably at a low cost because of its low molecular weight. A cyclobutyl purine derivative, a tautomer or stereoisomer thereof, or a salt, solvate, or hydrate thereof according to the present invention is a cyclobutyl purine derivative represented by the following general formula (1), a tautomer or stereoisomer thereof, or a salt, solvate, or hydrate thereof.
CYCLOBUTYL PURINE DERIVATIVE, ANGIOGENESIS PROMOTING AGENT, LUMENIZATION PROMOTING AGENT, NEUROCYTE GROWTH PROMOTING AGENT, AND DRUG
申请人:National University Corporation Kagawa University
公开号:EP2377865A1
公开(公告)日:2011-10-19
Provided is a compound having at least one selected from the group consisting of cell growth promoting activity, angiogenesis promoting activity, lumen formation promoting activity, cell migration promoting activity, and neurocyte growth promoting activity, which is a chemically stable low-molecular-weight substance that has high absorbability and can be supplied stably at a low cost because of its low molecular weight. A cyclobutyl purine derivative, a tautomer or stereoisomer thereof, or a salt, solvate, or hydrate thereof according to the present invention is a cyclobutyl purine derivative represented by the following general formula (1), a tautomer or stereoisomer thereof, or a salt, solvate, or hydrate thereof.