Abstract: A novel process is provided for the efficient preparation of an asymmetric compound of structural formula I: employing dynamic kinetic resolution (DKR). The DKR process involves an enzymatic enantioselective amination reaction catalyzed by transaminases. The process can be used to manufacture key intermediates in the preparation of poly (ADP-ribose) polymerase (PARP) inhibitors which may be useful for the treatment of cancer.

Abstract: A novel process is provided for the efficient preparation of an asymmetric compound of structural formula I: employing dynamic kinetic resolution (DKR). The DKR process involves an enzymatic enantioselective amination reaction catalyzed by transaminases. The process can be used to manufacture key intermediates in the preparation of poly (ADP-ribose) polymerase (PARP) inhibitors which may be useful for the treatment of cancer.

Abstract: A novel process is provided for the efficient preparation of an asymmetric compound of structural formula I: employing dynamic kinetic resolution (DKR). The DKR process involves an enzymatic enantioselective amination reaction catalyzed by transaminases. The process can be used to manufacture key intermediates in the preparation of poly (ADP-ribose) polymerase (PARP) inhibitors which may be useful for the treatment of cancer.

Abstract: This invention relates to a resolution process for the preparation of fluoroleucine alkyl esters.

Abstract: A novel process is provided for the efficient preparation of an asymmetric compound of structural formula I: employing dynamic kinetic resolution (DKR). The DKR process involves an enzymatic enantioselective amination reaction catalyzed by transaminases. The process can be used to manufacture key intermediates in the preparation of poly (ADP-ribose) polymerase (PARP) inhibitors which may be useful for the treatment of cancer.

Abstract: The instant invention describes a novel asymmetric synthesis of fluoroleucine alkyl esters which utilizes a phase transfer catalyst and a solid additive.

Abstract: This invention relates to a resolution process for the preparation of fluoroleucine alkyl esters.

Abstract: Substituted bicyclic beta-lactams of Formula I: are ?-lactamase inhibitors, wherein a, X, R1 and R2 are defined herein. The compounds and pharmaceutically acceptable salts thereof are useful in the treatment of bacterial infections in combination with ?-lactam antibiotics. In particular, the compounds can be employed with a ?-lactam antibiotics (e.g., imipenem, piperacillin, or ceftazidime) against microorganisms resistant to ?-lactam antibiotics due to the presence of the ?-lactamases.

Abstract: Substituted bicyclic beta-lactams of Formula I: (I), are ?-lactamase inhibitors, wherein a, X, R1 and R2 are defined herein. The compounds and pharmaceutically acceptable salts thereof are useful in the treatment of bacterial infections in combination with ?-lactam antibiotics. In particular, the compounds can be employed with a ?-lactam antibiotics (e.g., imipenem, piperacillin, or ceftazidime) against microorganisms resistant to ?-lactam antibiotics due to the presence of the ?-lactamases.

Abstract: Substituted bicyclic beta-lactams of Formula I: (I), are ?-lactamase inhibitors, wherein a, X, R1 and R2 are defined herein. The compounds and pharmaceutically acceptable salts thereof are useful in the treatment of bacterial infections in combination with ?-lactam antibiotics. In particular, the compounds can be employed with a ?-lactam antibiotics (e.g., imipenem, piperacillin, or ceftazidime) against microorganisms resistant to ?-lactam antibiotics due to the presence of the ?-lactamases.

Abstract: An efficient synthesis for the preparation of N-[(3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-yl]-4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1 -carboxamide, by coupling (3R,6S)-3-amino-6-(2,3-difluorophenyl)-1-(2,2,2-trifluoroethyl)azepan-2-one and 2-oxo-1-(4-piperidinyl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine dihydrochloride with 1,1?-carbonyldiimidazole (“CDI”) as carbonyl source; and an efficient preparation of the potassium salt of N-[(3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-yl]-4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1-carboxamide.

Abstract: An efficient synthesis for the preparation of N-[(3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-yl]-4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1-carboxamide, by coupling (3R,6S)-3-amino-6-(2,3-difluorophenyl)-1-(2,2,2-trifluoroethyl)azepan-2-one and 2-oxo-1-(4-piperidinyl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine dihydrochloride with 1,1?-carbonyldiimidazole (“CDI”) as carbonyl source; and an efficient preparation of the potassium salt of N-[(3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-yl]-4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1-carboxamide.

Abstract: The present invention relates to a process for the efficient preparation of enantiomerically enriched beta amino acid derivatives wherein the amino group is unprotected. The product chiral beta amino acid derivatives are useful in the asymmetric synthesis of biologically active molecules. The process comprises an enantioselective hydrogenation of an amine-unprotected prochiral beta-amino acrylic acid or derivative thereof in the presence of a rhodium metal precursor complexed with a chiral mono- or bisphosphine ligand.

Abstract: The present invention relates to a process for the efficient preparation of enantiomerically enriched beta amino acid derivatives which are useful in the asymmetric synthesis of biologically active molecules. The process comprises an enantioselective hydrogenation of a prochiral beta amino acrylic acid derivative substrate in the presence of a transition metal precursor complexed with a chiral ferrocenyl diphosphine ligand.