A new protocol for the catalytic denitrative generation of radicalsfrom nitroalkanes was disclosed. 9-Fluorenol acts as a single-electron transfer catalyst that reduces nitroalkanes to promote the C-NO2 bond cleavage, followed by the formation of alkyl radicals. The obtained radicals participate in diverse transformations such as hydrogenation, Giese addition, spirocyclization, and Minisci reactions
4,6-SUBSTITUTED-PYRAZOLO[1,5-a]PYRAZINES AS JANUS KINASE INHIBITORS
申请人:ARRAY BIOPHARMA INC.
公开号:US20170362240A1
公开(公告)日:2017-12-21
Compounds of Formula I: and stereoisomers and pharmaceutically acceptable salts and solvates thereof in which R
1
, R
2
, R
3
and R
4
have the meanings given in the specification, are inhibitors of one or more JAK kinases and are useful in the treatment of JAK kinase-associated diseases and disorders, such as autoimmune diseases, inflammatory diseases, rejection of transplanted organs, tissues and cells, as well as hematologic disorders and malignancies and their co-morbidities.