Patents by Inventor Bhoopendra Tiwari

Bhoopendra Tiwari 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).

  • Method of preparing chiral ketones from aldehydes
    Patent number: 9120721
    Abstract: Present invention relates to a method of preparing a chiral ?- or ?-substituted ketone from the corresponding ?- or ?-substituted aldehyde, wherein the ketone has formula (I), (III) or (V), and the corresponding aldehyde has formula (II), (IV) or (VI), respectively, the method comprising reacting the aldehyde of formula (II), (IV) or (VI) in the presence of an amine, oxygen and an organic solvent, wherein the reaction is carried out in the absence of a metal-based catalyst or a metal-based oxidant, wherein: R is H, a substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C15 alkenyl, substituted or unsubstituted C2-C15 alkynyl, substituted or unsubstituted C3-C15 cycloalkyl, substituted or unsubstituted C3-C15 cycloalkenyl, substituted or unsubstituted C3-C15 heterocycloalkyl, substituted or unsubstituted C3-C15 heterocycloalkenyl, substituted or unsubstituted C6-C15 aryl, or substituted or unsubstituted C6-C15 heteroaryl; and R? is H, a substituted or unsubstituted C1-C10 alkyl, substitut
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: September 1, 2015
    Assignee: Nanyang Technological University
    Inventors: Yonggui Chi, Bhoopendra Tiwari
  • METHOD OF PREPARING CHIRAL KETONES FROM ALDEHYDES
    Publication number: 20140309459
    Abstract: Present invention relates to a method of preparing a chiral ?- or ?-substituted ketone from the corresponding ?- or ?-substituted aldehyde, wherein the ketone has formula (I), (III) or (V), and the corresponding aldehyde has formula (II), (IV) or (VI), respectively, the method comprising reacting the aldehyde of formula (II), (IV) or (VI) in the presence of an amine, oxygen and an organic solvent, wherein the reaction is carried out in the absence of a metal-based catalyst or a metal-based oxidant, wherein: R is H, a substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C15 alkenyl, substituted or unsubstituted C2-C15 alkynyl, substituted or unsubstituted C3-C15 cycloalkyl, substituted or unsubstituted C3-C15 cycloalkenyl, substituted or unsubstituted C3-C15 heterocycloalkyl, substituted or unsubstituted C3-C15 heterocycloalkenyl, substituted or unsubstituted C6-C15 aryl, or substituted or unsubstituted C6-C15 heteroaryl; and R? is H, a substituted or unsubstituted C1-C10 alkyl, substitut
    Type: Application
    Filed: December 13, 2012
    Publication date: October 16, 2014
    Inventors: Yonggui Chi, Bhoopendra Tiwari