Regioselective arylation of uracil and 4-pyridone derivatives via copper(I) bromide mediated C–H bond activation
摘要:
A facile and effective synthesis of 6-aryluracil derivatives was accomplished by the direct C H bond activation for arylation. A series of 6-aryl-1,3-dimethyluracils were synthesized from the reaction of 1,3-dimethyluracil with various phenyl iodides in DMF, in the presence of copper(I) bromide as the catalyst and lithium tert-butoxide as the base. This methodology is applicable to a variety of 5-substituted uracils as well as 4-pyridone to provide direct accesses to versatile uracil and 4-pyridone derivatives. (C) 2012 Elsevier Ltd. All rights reserved.
PYRIMIDINONE DERIVATIVE HAVING AUTOTAXIN-INHIBITORY ACTIVITY
申请人:The University of Tokyo
公开号:US20170158704A1
公开(公告)日:2017-06-08
A compound according to any one of formula (Ia) to (Ic), or its pharmaceutically acceptable salt:
wherein R
1
, R
2
, R
3
, R
4a
, R
4c
, R
5
are as defined in the description.
A new regioselective synthesis of 5- and 6-aryluracil bases based on direct C–H arylations of diverse 1,3-protected uracils has been developed. Benzyl-protected uracils were selected as the most practical in terms of stability during the arylation and facile cleavage of the benzyl groups. Pd-catalyzed C–H arylations in the absence of CuI gave preferentially 5-aryl-, whereas the reactions in the presence
Pyrimidinone derivative having autotaxin-inhibitory activity
申请人:The University of Tokyo
公开号:US10183949B2
公开(公告)日:2019-01-22
A compound according to any one of formula (Ia) to (Ic), or its pharmaceutically acceptable salt:
wherein R1, R2, R3, R4a, R4c, R5 are as defined in the description.