Multiple n* Triplet Reactions in the Photochemistry of Alkyl-Substituted Acylpyrazines, Ketones with Four Low-Lying Zero-Order Triplets
摘要:
Irradiation of 7a-c and 11a-c leads to triplet-state abstraction of hydrogen by both nitrogen and oxygen with formation of the products shown in Schemes 1 and 2. Stern-Volmer quenching studies yield indistinguishable k(q) tau's far abstraction by carbonyl oxygen and adjacent nitrogen in 11a, and also for intermolecular comparisons both of abstraction by nitrogen in 11b and 11c, and also of abstraction by oxygen in 7a and nitrogen in 7b. Reactions of 7a and 11a are sensitized by acetone, but fragmentation of 7c is not.
Triplet states mediating hydrogen abstraction in 4-acylpyrimidines, 2-acylpyridines, 2-acylpyrazines, and 3-acylpyridazines
作者:Sreedharan Prathapan、Kevin E. Robinson、William C. Agosta
DOI:10.1021/ja00031a044
日期:1992.2
Irradiation of 9 leads to hydrogenabstraction by N(1) and fragmentation to 8 from a triplet with E τ ∼78 kcal/mol. Irradiation of 2-acylpyridines (10) leads to abstraction by both nitrogen and oxygen (cf. eq 4), with the same Stern-Volmer k q τ for the two processes
9 的辐照导致 N(1) 夺氢,并从 E τ ~78 kcal/mol 的三联体裂解为 8。2-酰基吡啶 (10) 的辐照导致氮和氧的提取(参见方程 4),这两个过程具有相同的 Stern-Volmer kq τ
TRI-CYCLIC PYRAZOLOPYRIDINE KINASE INHIBITORS
申请人:Jimenez Juan-Miguel
公开号:US20120136000A1
公开(公告)日:2012-05-31
The present invention relates to compounds useful as inhibitors of protein kinase. The invention also provides pharmaceutically acceptable compositions comprising said compounds and methods of using the compositions in the treatment of various disease, conditions, or disorders. The invention also provides processes for preparing compounds of the inventions.