Patents by Inventor Thomas Nabih

Thomas Nabih 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 the preparation of alkyl 1-methylcyclopropanecarboxylate
    Patent number: 6552217
    Abstract: Disclosed is a 4-step process for the preparation of alkyl esters of 1-methylcyclopropanecarboxylic acid which comprises the steps of (1) converting &ggr;-butyrolactone to &agr;-methyl-&ggr;-butyrolactone; (2) converting the &agr;-methyl-&ggr;-butyrolactone from step (1) to an alkyl 4-halo-2-methylbutyrate; (3) producing a xylene solution of the alkyl 4-halo-2-methylbutyrate; and (4) contacting the xylene solution of an alkyl 4-halo-2-methylbutyrate from step (3) with an alkali metal alkoxide under conditions of temperature and pressure which causes vaporization of (i) an alkanol as it is formed and (ii) an alkyl 1-methylcyclopropanecarboxylate as it is formed from the alkyl 4-halo-2-methylbutyrate. Also disclosed are processes whereby the alkyl 1-methylcyclopropanecarboxylate, prepared as described above, is converted to 1-methylcyclopropylamine.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: April 22, 2003
    Assignee: Eastman Chemical Company
    Inventors: John Clark Hubbs, David Carl Attride, Neil Warren Boaz, James Charles Ciula, John Thorton Maddox, Thomas Nabih, William Dell Nottingham, David Chris Spencer
  • Process for the preparation of alkyl 1-methylcyclopropanecarboxylate
    Publication number: 20020016493
    Abstract: Disclosed is a 4-step process for the preparation of alkyl esters of 1-methylcyclopropanecarboxylic acid which comprises the steps of (1) converting &ggr;-butyrolactone to &agr;-methyl-&ggr;-butyrolactone; (2) converting the &agr;-methyl-&ggr;-butyrolactone from step (1) to an alkyl 4-halo-2-methylbutyrate; (3) producing a xylene solution of the alkyl 4-halo-2-methylbutyrate; and (4) contacting the xylene solution of an alkyl 4-halo-2-methylbutyrate from step (3) with an alkali metal alkoxide under conditions of temperature and pressure which causes vaporization of (i) an alkanol as it is formed and (ii) an alkyl 1-methylcyclopropanecarboxylate as it is formed from the alkyl 4-halo-2-methylbutyrate. Also disclosed are processes whereby the alkyl 1-methylcyclopropanecarboxylate, prepared as described above, is converted to 1-methylcyclopropylamine.
    Type: Application
    Filed: July 2, 2001
    Publication date: February 7, 2002
    Inventors: John Clark Hubbs, David Carl Attride, Neil Warren Boaz, James Charles Ciula, John Thorton Maddox, Thomas Nabih, William Dell Nottingham, David Chris Spencer