BACKGROUND AND METHODS Until recently, bupivacaine had been the anesthetic of choice for loco-regional blocks due to the quality and duration of the anesthesia. But its cardiovascular toxicity is a source of concern for anesthesiologists who seek new pharmacological options with a smaller degree of this problem. Its levorotatory isomer, levobupivacaine, that would be less cardiotoxic due a smal...

During an implementation of current research, a set optically pure chiral aziridines and aziridine imines bearing phosphine moiety was prepared with high values chemical yield. The above heteroorganic derivatives were tested for catalytic utility as ligands in asymmetric Simmons-Smith cyclopropanation diethylzinc addition to various aldehydes. Most the desired products formed yields, satisfacto...

A new method for the determination of enantiomeric compositions of a variety of drugs including propranolol, atenolol, and ibuprofen has been developed. The method is based on the use of the near-infrared technique to measure diastereomeric interactions between an added carbohydrate compound and both enantiomeric forms of a drug followed by evaluation of the data by partial least square analysi...

Introduction: Meteorites provide a record of the chemical processes that occurred in the early solar system before life began on Earth. The delivery of organic compounds by carbonaceous meteorites to the early Earth and other planetary bodies could have been an important source of prebiotic compounds required for the emergence of life as we know it [1]. The finding of slight to significant enan...

The wild-type bacterial phosphotriesterase catalyzes the stereoselective hydrolysis of racemic pairs of organophosphorus compounds. The enzymatic stereoselectivity can be substantially enhanced via systematic alteration of the pKa for the leaving group phenol in the target substrates. These changes alter the rate-limiting step for substrate turnover from a diffusional event to phosphorus-oxygen...

We propose an enantio-detection method of chiral molecules in a cavity with external drive. The are coupled quantized field and two classical light fields to form the cyclic three-level systems. chirality-dependent cavity-assisted three-photon process systems leads generation intracavity photons. Simultaneously, drive also results chirality-independent Based on interference between photons gene...

A new method has been developed for the determination of enantiomeric compositions of a variety of compounds. The method is based on the use of the near-infrared technique to measure diastereomeric interactions between an added carbohydrate compound with both enantiomeric forms of an analyte followed by partial least-squares analysis of the data. The fact that the method works well with all thr...