The oxidativecleavage of indoles (Witkop oxidation) involving the use of H2O2 or urea hydrogenperoxide in combination with a polar solvent has been described. Among these solvents, 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) stands out as the one affording the corresponding 2-ketoacetanilides generally in higher yields The protocol described has also enabled the oxidation of different pyrroles and furans
已经描述了涉及使用 H 2 O 2或过氧化氢尿素与极性溶剂的吲哚的氧化裂解(Witkop 氧化)。在这些溶剂中,1,1,1,3,3,3-六氟异丙醇 (HFIP) 脱颖而出,通常以更高的产率提供相应的 2-酮乙酰苯胺。所描述的协议还能够氧化不同的吡咯和呋喃衍生物。此外,该程序是大规模实施的,从反应混合物中蒸馏出 HFIP 并重复使用(最多 4 个循环),而不会显着损害反应结果,这说明了其可持续性和适用性。
Acridines As Inhibitors Of Haspin And DYRK Kinases
申请人:Higgins Jonathan
公开号:US20130102627A1
公开(公告)日:2013-04-25
The present disclosure is directed to compounds of Formula I: which are inhibitors of Haspin kinase and DYRK kinases. The compounds of the present disclosure, and compositions thereof, are useful in the treatment of disease related to Haspin kinase and DYRK kinase expression and/or activity.
Structure–activity relationship study of acridine analogs as haspin and DYRK2 kinase inhibitors
作者:Gregory D. Cuny、Maxime Robin、Natalia P. Ulyanova、Debasis Patnaik、Valerie Pique、Gilles Casano、Ji-Feng Liu、Xiangjie Lin、Jun Xian、Marcie A. Glicksman、Ross L. Stein、Jonathan M.G. Higgins
DOI:10.1016/j.bmcl.2010.04.150
日期:2010.6
Haspin is a serine/threonine kinase required for completion of normal mitosis that is highly expressed during cell proliferation, including in a number of neoplasms. Consequently, it has emerged as a potential therapeutic target in oncology. A high throughput screen of approximately 140,000 compounds identified an acridine analog as a potent haspin kinase inhibitor. Profiling against a panel of 270 kinases revealed that the compound also exhibited potent inhibitory activity for DYRK2, another serine/threonine kinase. An optimization study of the acridine series revealed that the structure-activity relationship (SAR) of the acridine series for haspin and DYRK2 inhibition had many similarities. However, several structural differences were noted that allowed generation of a potent haspin kinase inhibitor (33, IC(50) <60 nM) with 180fold selectivity over DYRK2. In addition, a moderately potent DYRK2 inhibitor (41, IC(50) <400 nM) with a 5.4-fold selectivity over haspin was also identified. (C) 2010 Elsevier Ltd. All rights reserved.
Beer et al., Journal of the Chemical Society, 1954, p. 4139,4141
作者:Beer et al.
DOI:——
日期:——
Dioxygen transfer from 4a-hydroperoxyflavin anion. 3. Oxygen transfer to the 3-position of substituted indoles