Structural requirements for TLR7-selective signaling by 9-(4-piperidinylalkyl)-8-oxoadenine derivatives
摘要:
We report the synthesis and biological evaluation of a new series of 8-oxoadenines substituted at the 9-position with a 4-piperidinylalkyl moiety. In vitro evaluation of the piperidinyl-substituted oxoadenines 3a-g in human TLR7- or TLR8-transfected HEK293 cells and in human PBMCs indicated that TLR7/8 selectivity/potency and cytokine induction can be modulated by varying the length of the alkyl linker. Oxoadenine 3f containing a 5-carbon linker was found to be the most potent TLR7 agonist and IFN alpha inducer in the series whereas 3b possessing a 1-carbon linker was the most potent TLR8 agonist. (C) 2015 Elsevier Ltd. All rights reserved.
The present invention relates to compounds of formula (I):
wherein R
1
is C
1-6
alkylamino, or C
1-6
alkoxy; R
2
is a group having the structure:
n is an integer having a value of 1 to 6; Het is a 6-membered saturated heterocycle containing one nitrogen atom wherein Het is attached to the —(CH
2
)
n
— moiety at any carbon atom of the heterocycle; R
3
is hydrogen, C
1-8
alkyl, or C
3-7
cycloalkylC
0-6
alkyl; and salts thereof are inducers of human interferon. Compounds which induce human interferon may be useful in the treatment of various disorders, for example the treatment of allergic diseases and other inflammatory conditions for example allergic rhinitis and asthma, the treatment of infectious diseases and cancer, and may also be useful as vaccine adjuvants.
The present invention relates to compounds of formula (I):
wherein R1 is C1-6alkylamino, or C1-6alkoxy; R2 is a group having the structure:
n is an integer having a value of 1 to 6; Het is a 6-membered saturated heterocycle containing one nitrogen atom wherein Het is attached to the —(CH2)n— moiety at any carbon atom of the heterocycle; R3 is hydrogen, C1-8alkyl, or C3-7cycloalkylC0-6alkyl; and salts thereof are inducers of human interferon. Compounds which induce human interferon may be useful in the treatment of various disorders, for example the treatment of allergic diseases and other inflammatory conditions for example allergic rhinitis and asthma, the treatment of infectious diseases and cancer, and may also be useful as vaccine adjuvants.