Patents by Inventor Anand Vinod Shindikar

Anand Vinod Shindikar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for Preparation of Dextrorotatory Isomer of 6-(5- chloro-pyrid-2-yl)-5-[(4-methyl -1-piperazinyl) carbonyloxy] -7-oxo-6,7-dihydro-5H-pyrrolo [3,4-b] pyrazine (Eszopiclone)
    Publication number: 20090198058
    Abstract: Disclosed herein is the process for preparation of 6-(5-chloro-pyrid-2-yl)-5-[(4-methyl-1-piperazinyl)carbonyloxy]-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazine (Zopiclone), its resolution to get the dextrorotatory isomer of formula (I) substantially free of R(?) enantiomer and recovery of key raw material i.e. 6-(5-chloro pyrid-2-yl)-5-hydroxy-7-oxo-5,6-dihydropyrrolo[3,4-b]pyrazine from the R-isomer of Zopiclone followed by conversion of the recovered compound to get pure Eszopiclone (I) in high yield and high purity.
    Type: Application
    Filed: August 6, 2008
    Publication date: August 6, 2009
    Inventors: Dhananjay Govind SATHE, Nandu Baban Bhise, Harish Kashinath Mondkar, Anand Vinod Shindikar, Manoj Madhukarrao Deshpande