Discovery of novel Ponatinib analogues for reducing KDR activity as potent FGFRs inhibitors
摘要:
FGF receptors (FGFRs) are tyrosine kinases that are overexpressed in diverse tumors by genetic alterations such as gene amplifications, somatic mutations and translocations. Owing to this characteristic, FGFRs are attractive targets for cancer treatment. It has been demonstrated that most multi-targeted, ATP competitive tyrosine kinase inhibitors are active against FGFRs as well as other kinases. The design of new and more selective inhibitors of FGFRs, which might be reduced off-target and side effects, is a difficult yet significant challenge. The results of the current investigation, show that novel Ponatinib analogues are highly active as FGFR inhibitors and that they possess reduced kinase insert domain receptor (KDR) activities. Observations made in a structure and activity relationship (SAR) investigation led to the development of a promising, orally available lead compound 4, which displays a 50-100 fold in vitro selectivity for inhibition of FGFR1-3 over KDR. In addition, biological evaluation of compound 4 showed that it displays significant antitumor activities in FGFR1-amplificated H1581 and FGFR2amplificated SNU-16 xenograft models. (C) 2016 Elsevier Masson SAS. All rights reserved.
Formamide as an Unconventional Amine Protecting Group for PET Radiochemistry
作者:Jimmy Erik Jakobsson、Gaute Grønnevik、Waqas Rafique、Karoline Hartvig、Patrick Johannes Riss
DOI:10.1002/ejoc.201800554
日期:2018.8.1
yielding radiochemistry adapted protocol utilising formamides as masking groups for secondary and tertiary amines. Selective reducing conditions were devised using borane reagents. In this protocol formamide functionalities were found to have an orthogonal reactivity to most other carbonyl functions, while effectively protectingamines from oxidative degradation. We exemplify the newly developed methodology
The invention relates to compounds of formula (I)
wherein
one of R
5
and R
6
is hydrogen or R
2
and the other is (a)
pharmaceutical compositions containing them and their use in the treatment of conditions or disorders which are mediated via the S1P1 receptor.
The invention relates to compounds of formula (I)
wherein
one of R5 and R6 is hydrogen or R2 and the other is (a)
pharmaceutical compositions containing them and their use in the treatment of conditions or disorders which are mediated via the S1P1 receptor.
The invention relates to compounds of formula (I)
wherein
one of R5 and R6 is hydrogen or R2 and the other is (a)
processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of conditions or disorders which are mediated via the S1P1 receptor.