Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

30results about How to "Efficient and cost-effective process" patented technology

System and method for automated screening and qualification of employment candidates

A system and method are disclosed which assist an employer in determining qualified candidates for positions of employment with the employer in an efficient and cost-effective manner. A preferred embodiment provides a software product that enables employers to generate a customized application program executable to interact with candidates and determine the qualified candidates for a position with the employer. More specifically, the software product receives as input from the employer a desired hiring criteria, and then generates a customized application program that utilizes the desired hiring criteria to determine the qualified candidates for the employer. Most preferably, a customized application program is generated, with which candidates may interact to effectively self-administer a qualification session for a position with the employer. In a most preferred embodiment, the generated application program may, upon determining a qualified candidate, take actions necessary to assist in further consideration of the qualified candidate. As an example, the application program may access a hiring manager's calendar, and schedule an interview for the qualified candidate at an available time. As a further example, the application program may forward information about the qualified candidate (e.g., resume, responses of the candidate to a questionnaire conducted by the application program, writing sample, letters of recommendation, etcetera) to the hiring manager via e-mail, fax, or some other method of communicating data.
Owner:MAPLEBEAR INC

Process for the preparation of eszopiclone

The invention relates to a process for making 6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo-[3,4-b]pyrazin-5-yl-4-methyl piperazine-1-carboxylate, also known as zopiclone. The invention further describes an effective method for resolving zopiclone into its enantiomers (eszopiclone and (R)-zopiclone) and also provides a method of recycling of (R)-zopiclone. The process for making (S)-6(S)-6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo-[3,4-b]pyrazin-5-yl-4-methyl piperazine-1-carboxylate (eszopiclone), comprises reacting 2-amino 5-chloropyridine with pyrazine 2,3,dicarboxylic acid anhydride at room temperature to obtain 3-(5-chloropyrid-2-yl)carbamoyl-2-pyrazine-2-carboxylic acid; cyclizing the 3-(5-chloropyrid-2-yl)carbamoyl-2-pyrazine-2-carboxylic acid in a second inert organic solvent to obtain 6-(5-chloropyrid-2-yl)5,7-dioxo-5,6-dihydropyrrolo[3,4-b]-pyrazine; reducing the 6-(5-chloropyrid-2-yl)5,7-dioxo-5,6-dihydropyrrolo[3,4-b]-pyrazine to obtain 6-(5-chloropyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo-[3,4-b]pyrazine; pyrazine with 1-chlorocarbonyl-4-methylpiperazine hydrochloride in a third organic solvent in presence of triethyl amine along with a catalytic amount of an acylation catalyst to obtain racemic zopiclone; e) recrystallizing the zopiclone from an alkyl ester solvent followed by purifying in suitable alcohols or mixtures thereof; and resolving the racemic zopiclone by treating with (+)-O—O′ dibenzoyl tartaric acid to obtain eszopiclone.
Owner:CENTAUR CHEM PVT +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products