Preparation, hydrolysis, and oral absorption of .alpha.-carboxy esters of carbenicillin
                                
                                    
                                        作者:J. Peter Clayton、Martin Cole、Stephen W. Elson、Kenneth D. Hardy、Linda W. Mizen、Robert Sutherland                                    
                                    
                                        DOI:10.1021/jm00236a013
                                    
                                    
                                        日期:1975.2
                                    
                                    Twelve alpha-carboxy esters of carbenicillin, a parenteral broad spectrum semisynthetic penicillin, were synthesized and examined as potential oral carbenicillin derivatives. The rates at which the esters were hydrolyzed in vitro to carbenicillin by animal and human tissues were compared and the carbenicillin serum levels arising after oral administration of the esters were measured in squirrel monkeys and human volunteer subjects. The alpha-carboxyphenyl ester of carbenicillin [carfecillin (British Pharmacopoeia approved name), BRL 3475] WAS SELECTED FOR FURTHER STUDY AND IS PRESENTLY UNDERGOING CLInical trial.