PYRAZOLOPYRIMIDINE JAK INHIBITOR COMPOUNDS AND METHODS
申请人:Genentech, Inc.
公开号:US20140107099A1
公开(公告)日:2014-04-17
The invention provides JAK kinase inhibitors of Formula Ia, enantiomers, diasteriomers or pharmaceutically acceptable salts thereof, wherein R
1
, R
2
, R
7
and Z are defined herein, a pharmaceutical composition that includes a compound of Formula Ia and a pharmaceutically acceptable carrier, adjuvant or vehicle, and methods of treating or lessening the severity of a disease or condition responsive to the inhibition of a JAK kinase activity in a patient.
An efficient synthetic approach to synthesize N-aryl-5-aminopyrazoles from anilines via a one-pot, telescoped reaction performed in entirely aqueous conditions has been developed. This protocol provides a rapid, convenient method to prepare N-aryl-5-aminopyrazoles, useful building blocks for the synthesis of several bicyclic nitrogen heterocycles, by avoiding the isolation of the toxic intermediate arylhydrazines and the use of a metallic reductant.