Pfizer Inc.
6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxamide compounds

Abstract:

The present invention is directed to PDE4B inhibitors of Formula I: (I) or a pharmaceutically acceptable salt thereof, wherein the substituents R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are as defined herein. The invention is also directed to pharmaceutical compositions comprising the compounds, methods of treatment using the compounds, and methods of preparing the compounds. ##STR00001##