Patents by Inventor Vasantha Gowda Nekkilar

Vasantha Gowda Nekkilar 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 E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidino prop-1-ene and acid addition salts thereof
    Patent number: 8350045
    Abstract: A process for preparation of E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula-I, and acid addition salts thereof, said process comprising; dehydrating 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinopropan-1-ol of Formula III followed by adding a base solution to obtain a mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene, and washing said mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene with water to dissolve Z isomer and to obtain E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula I, which is substantially free from Z isomer.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: January 8, 2013
    Assignee: Hikal Limited
    Inventors: Rajender Pershad Gupta, Veerabhadra Swamy Hiremath, Raghavendra Arekal Vasanna, Vasantha Gowda Nekkilar
  • PROCESS FOR PREPARATION OF E-ISOMER OF 1-(4-METHYLPHENYL) - 1-(2-PYRID YL)-3-PYRROLIDINO PROP-1-ENE AND ACID ADDITION SALTS THEREOF
    Publication number: 20110046384
    Abstract: A process for preparation of E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula-I, and acid addition salts thereof, said process comprising; dehydrating 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinopropan-1-ol of Formula III followed by adding a base solution to obtain a mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene, and washing said mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene with water to dissolve Z isomer and to obtain E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula I, which is substantially free from Z isomer.
    Type: Application
    Filed: December 16, 2008
    Publication date: February 24, 2011
    Applicant: HIKAL LIMITED
    Inventors: Rajender Pershad Gupta, Veerabhadra Swamy Hiremath, Raghavendra Arekal Vasanna, Vasantha Gowda Nekkilar