Compounds having the following formula I: or a stereoisomer or pharmaceutically-acceptable salt thereof, where R
1
, R
2
, R
3
, R
4
, and R
5
are as defined herein, are useful in the modulation of IL-12, IL-23 and/or IFNα, by acting on Tyk-2 to cause signal transduction inhibition.
具有以下公式I的化合物,或其立体异构体或药学上可接受的盐,其中R1,R2,R3,R4和R5如本文所定义,可用于通过作用于Tyk-2来引起
信号转导抑制,从而调节IL-12,I
L-23和/或IFNα。