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Nitrogen-containing heterocycles

  • US 6,927,294 B1
  • Filed: 03/10/2003
  • Issued: 08/09/2005
  • Est. Priority Date: 03/08/2002
  • Status: Active Grant
First Claim
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1. A compound of formula embedded imagewherein:

  • R1 is hydrogen, alkyl, aryl, heteroaryl, hydroxy, or alkoxy;

    R3 is aryl, heteroaryl, alkenyl, or alkynyl, or R1 and R3 can be joined to form a ring of 5 to 10 atoms;

    R4 is hydrogen, alkyl, aryl, heteroaryl, alkenyl, alkynyl, acyl, carboxy, or carboxamido.

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